Hereditary Cancer Genetics: What You Need To Know in 2018 - Larry Geier, MD, MBA

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Hereditary Cancer Genetics: What You Need To Know in 2018 - Larry Geier, MD, MBA
Hereditary Cancer Genetics:
What You Need To Know in 2018

         Larry Geier, MD, MBA
 Medical Oncology and Cancer Risk Management
             TGW Cancer Genetics
                  May, 2018
       drgeiergenetics@gmail.com
Hereditary Cancer Genetics: What You Need To Know in 2018 - Larry Geier, MD, MBA
Disclosure

Speaker Bureau, Myriad Genetic Labs
Hereditary Cancer Genetics: What You Need To Know in 2018 - Larry Geier, MD, MBA
Questions For Today
• Why should we care about hereditary cancer?
• How do we recognize and evaluate suspicious families?

• What is PARP, and why (and in whom?) would we want to
  inhibit it?

• What is all the buzz about hereditary prostate cancer?

• How can we be more effective at diagnosing Lynch syndrome
  (and what in the world is a “microsatellite,” and why do we
  care if it is “unstable?”)
Hereditary Cancer Genetics: What You Need To Know in 2018 - Larry Geier, MD, MBA
Comprehensive Quality Cancer Care
                      Elements
       Genetics and                  Diagnostics
    Risk Management

  Survivorship                              Surgery

         Clinical                         Radiation
        Research
                      Drug Therapy
Kansas City Cancer Center*
  Genetic Testing Results by Year

*27 Med Onc          TOTAL PTS   TOTAL PTS
 8 Rad Onc
              YEAR
                      TESTED      POSITIVE
              2004      28          7
              2005      69          15
              2006      48          10

                                             5
Kansas City Cancer Center
            (Circa 2006)
• At KCCC, this became a quality of care issue, as we had
  been failing our patients and watching them develop
  second cancers that could have been prevented

• In 2007, KCCC initiated a new effort to identify and test
  patients who met guidelines for genetic testing:
       • Better cancer family histories
       • More attention to age and cancer phenotype
       • Expedited in-house testing at the time of analysis

                                                              6
Kansas City Cancer Center*
       Genetic Testing Results by Year

     *27 Med Onc          TOTAL PTS   TOTAL PTS
      8 Rad Onc
                   YEAR
                           TESTED      POSITIVE
                   2004      28          7
                   2005      69          15
 New focus on      2006      48          10
cancer genetics
 and risk mgmt     2007     296          45
                   2008     244          40
                   2009     332          41
                   2010     380          49
                                                  7
Our Collective Report Card

• DNA testing for BRCA and Lynch syndrome has now been
  clinically available for more than 20 years
• We have comprehensive guidelines on who should be tested

• It is estimated that fewer than 15% of all BRCA mutation
  carriers have been found

• Similarly, fewer than 5% of all Lynch carriers have been found

       (Cross et al, Clin Med Res 2012; Singh et al, Clin Gastro Hep 2010)
My Track Record

         • 345 patients with
           pathogenic mutations

         • Over 30% were either
           cancer survivors or
           never had cancer
Relatively Common
    Hereditary Cancer Syndromes
• Hereditary Breast/Ovary Syndrome (BRCA genes)
     • Breast, ovary, prostate, melanoma, pancreas

• Lynch Syndrome (“mismatch repair” genes)
     • Colon, uterus, ovary, stomach, pancreas, others

• Colon polyposis syndromes (APC, MUTYH genes)
     • Colon, upper GI, thyroid, others
BRCA And Lifetime Cancer Risks:
    Female (Approximate)
   CANCER     BRCA1         BRCA2

   Breast      80%           80%

   Ovarian   40-50%          25%

  Prostate     NA             NA

  Pancreas   Elevated        4-7%

  Melanoma   Unknown       Elevated

                        (NCCN 2016)

                                      11
BRCA And Lifetime Cancer Risks:
     Male (Approximate)
   CANCER                    BRCA1                      BRCA2

    Breast                1-2% (15X)                7-8% (100X)

    Ovarian                     NA                         NA

 Prostate (
Approximate Lifetime Cancer Risks
Associated with Lynch Syndrome*
        •    Colorectal 50-80%
        •    Endometrial 25-60%
        •    Ovary 4-24%
        •    Stomach 3-13%
        •    Urothelial 1-7%
        •    Biliary/Pancreas 1-6%
        •    Small intestine 3-6%
        •    CNS (GBM) 1-3%
        •    Breast, Prostate, Bladder (not yet quantified)
 *(NCCN 2016 – risks vary according to the gene affected)
Prevalence of Hereditary Cancer:
       BRCA vs Lynch Syndrome

   • Prevalence of BRCA mutations in U.S. ≈ 1 in 300
         • Prevalence of BRCA in Ashkenazi Jews ≈ 1 in 40
         • Prevalence also high in other types of Jews

   • Prevalence of Lynch syndrome in U.S. ≈ 1 in 300

(Narod, et al. 2004; Anglian, et al. 2000; Roa, et al. 1996; Boland, et al. 2010)
Familial vs Hereditary Cancer Risk
• Familial patterns are seen in several types of cancer
  (e.g., breast, colon, prostate)
       • Generally confer a modest increase in risk
       • Not attributable to a known defect in a single gene

• Hereditary cancer indicates that cancer risk is attributable
  to an inherited mutation that disrupts gene function
       • Often a much higher relative risk compared to
         average, and a tendency to occur at younger age
       • The affected genes are typically DNA repair genes

                                                        15
Categories of Breast Cancer Risk

                          70
                          60
% Risk of Breast Cancer

                          50
                          40                                           BRCA Mutation
                          30                                           Familial
                                                                       Normal
                          20
                          10
                           0
                                     30   40   50   60       70
                               Age

                                                    (Narod, personal communication, 2009)
Hereditary Cancer Syndromes
        Clinical Implications
• Prevention and high-risk management in carriers of
  pathogenic mutations
             • Breast       Uterus
             • Ovary        Colorectal
                    • Others?

• Preventive surgery – eg, breast, uterus, ovary
• Chemoprevention – eg, tamoxifen, OCP, aspirin
• High-risk surveillance – eg, breast MRI, colonoscopy

                                                         17
Hereditary Cancer Syndromes
       Clinical Implications
Optimal management of the newly diagnosed cancer

      • Overall prognosis
      • Surgery options
      • Chemotherapy options:
          • PARP inhibitors in BRCA ovarian, breast cancer
          • Neoadjuvant platinum in BRCA breast cancer
          • Same drugs are promising in hereditary
            prostate cancer

                                                             18
Three Keys To Integrating
Cancer Genetics Into Your Practice
1) Finding the right people to test – more attention to
   obtaining better cancer family histories

2) Testing the right genes to maximize the chance of
   solving the family puzzle

3) Performing the test using the right lab methodology
   to maximize the chance of getting the correct answer

                                                     19
How Many Cancer Patients
  Should Undergo Genetic Testing?
When current NCCN guidelines are applied to large groups of
cancer patients, the following approximate percentages of
patients will be appropriate for genetic testing:

    Ovarian                             100%                              NCCN 2008
     Breast                             > 25%                             NCCN 2017
   Colorectal                           > 25%                             NCCN 2015
  Endometrial                           > 50%                             NCCN 2015
    Prostate                           > 20% ?                            NCCN 2017
       Zhang et al. Gynecol Oncol. 2011; Eisenbraun et al. Community Oncology, 2010;
          Boland et al. Gastroenterology. 2010; Kerber et al. Familial Cancer, 2005;
       Hampel et al. Cancer Res 2006; Lu et al. JCO, 2007; Pritchard et al, NEJM, 2016
Hallmarks of Hereditary Cancer

• Family clustering of specific cancers among
      siblings or across multiple generations
• Younger age at diagnosis compared to
      non-hereditary cases of the same cancer
• Multiple cancers in the same person
• Specific phenotypes in some cancers, eg:
       • Triple negative breast cancer (BRCA)
       • Proximal mucinous colon cancer (Lynch)
       • Higher-grade prostate cancer (BRCA)

                                                  21
“Automatics” For BRCA Testing
Single indicators for DNA testing:

•   Breast cancer by age 45 (invasive or DCIS)
•   ANY epithelial ovarian cancer, regardless of age or family hx
•   ANY male breast cancer
•   Triple negative breast cancer by age 60
•   Breast cancer in a Jewish woman

• First degree family members of any of the above
• Family history of BRCA cancers (3 cancers within 3 degrees)

                                               (NCCN, 2017)
                                                                    22
Sherry
• 32 female with invasive ductal cancer, triple negative,
  4 cm and rapidly growing
• Father’s side of family unknown

• No response to one cycle neoadjuvant AC

• Genetic testing at dx revealed BRCA1 mutation

• Neoadjuvant cisplatin induced pathologic CR at the
  time of bilateral mastectomy
• Remains free of disease 11 years later
                                                            23
“Automatics” For BRCA Testing
Single indicators for DNA testing:

•   Breast cancer by age 45 (invasive or DCIS)
•   ANY epithelial ovarian cancer, regardless of age or family hx
•   ANY male breast cancer
•   Triple negative breast cancer by age 60
•   Breast cancer in a Jewish woman
•   Metastatic HER2-negative breast cancer

• First degree family members of any of the above
• Family history of BRCA cancers (3 cancers within 3 degrees)
                                               (NCCN, 2018)
                                                                    24
PARP Inhibitors For BRCA+ Cancers

• The BRCA genes are critical to the repair of double-strand DNA
  breaks (homologous recombination)

• The cancers that result from germline BRCA mutations are
  BRCA-deficient, and therefore can not efficiently repair these
  DNA breaks

• These cells are therefore more dependent on alternate
  mechanisms of DNA repair to survive

                                                                   25
PARP Inhibitors For BRCA+ Cancers

• The PARP enzymes are integral to one or more of these
  “escape” mechanisms for DNA repair

• BRCA-deficient cancer cells are therefore potentially
  vulnerable to inhibition of these PARP enzymes

• BRCA+ cancers of the ovary, breast, prostate, and pancreas
  have been shown to be sensitive to these PARP inhibitors

                                                               26
The OlympiAD Trial
• 302 patients with germline BRCA mutations and metastatic
  HER2-neg breast cancer, all previously treated with a taxane
  and an anthracycline +/- hormonal therapy

• 2:1 randomization to receive either olaparib or one of 3 single
  agent chemo regimens (capecitabine, eribulin, or vinorelbine)

• All patients confirmed BRCA-positive using the Myriad
  BRACAnalysis CDx as a companion diagnostic

• Primary endpoint was progression-free survival

                                       (Robson, et al NEJM, 2017)
                                                                    27
The OlympiAD Trial
• Median PFS was 7.0 months with olaparib vs 4.2 months with
  single agent chemotx

• Response rate was 60% for olaparib and 29% with chemotx

• Based on this study, NCCN added to the BRCA guidelines that
  all patients with HER2-neg metastatic breast cancer are
  appropriate for germline BRCA testing

• BRACAnalysis CDX is now FDA-approved for this indication

                                     (Robson, et al NEJM, 2017)
                                                                  28
PARP Inhibitors For BRCA+ Cancers
• PARP inhibitors are now FDA-approved for patients who carry
  germline BRCA mutations and have one of the following:

       • Ovarian (epithelial)
       • Metastatic HER2-negative breast cancer

• Also effective in metastatic prostate cancer related to germline
  mutations in BRCA or other DNA repair genes
• Appear to be effective in BRCA+ pancreas cancer

                                                                30
Hereditary Prostate Cancer
• Hereditary prostate cancer is frequently more aggressive
  biologically than sporadic prostate cancer, and this may
  need to be factored into medical decision-making

• Some promising drug therapies for advanced prostate
  cancer may only be effective in hereditary cases

• The patient may have substantial risk for other cancers,
  and these risks must be actively managed

• The family may also be at risk for multiple kinds of cancer

                                                                31
BRCA And Prostate Cancer Biology
• Retrospective European study of 2019 patients with prostate
  cancer (18 BRCA1, 61 BRCA2, and 1940 non-carriers)
• Correlated mutation status with histology, stage, outcome

• BRCA mutations were more frequently associated with:
      • Gleason score 8 or higher (p = .00003)
      • T3/T4 stage (p = .003)
      • Nodal involvement (p = .00005)
      • Metastasis at diagnosis (p = .005)
• Cause-specific survival was significantly worse in BRCA
  mutation carriers than in non-carriers (8.6 vs 15.7 years)
                                      (Castro et al, JCO, 2013)

                                                           32
Implications Of Inherited Mutations
 On Prostate Cancer Management
• Active surveillance may not be appropriate

• EBRT may be associated with excessive radiotoxicity in
  carriers of mutations in certain genes (TP53, ATM)

• EBRT may increase risk of second cancers in the radiated
  field (ATM, rectal cancer in Lynch syndrome patients)

• Platinum and PARP inhibitors may be uniquely effective in
  hereditary patients with advanced prostate cancer
                                   (Castro et al, JCO, 2013)
                                                          33
NCCN Guidelines For BRCA Testing
   In Prostate Cancer (2017)
• Gleason score of 7 or higher (required)
        PLUS
• ANY ONE of the following in the family (among relatives
  within 3 degrees on the same side of the family):
      • One relative with ovarian cancer (any age)
      • One relative with breast cancer by age 50
      • Two relatives with any combination of breast,
         pancreas, or prostate (Gleason > 7) at any age

• Even more suspicious if Jewish or prostate cancer < 55
                             (NCCN V2.2017)
                                                            34
NCCN Guidelines For BRCA Testing
   In Prostate Cancer (2017)

 Any male with metastatic prostate cancer,
    regardless of age, family history, or
               Gleason score

                        (NCCN 2017)
                                             35
Other Genes And Prostate Cancer
• Multicenter registry study of men with prostate cancer,
  unselected for age, family history, or Gleason score
• Each underwent genetic testing with a panel of 20 genes
  involved with DNA repair

• 11.8 % of 692 men with metastatic prostate cancer had
  an inherited pathogenic mutation
       • 5.3% of all men with metastatic prostate cancer
         had a mutation in BRCA2
       • ATM, CHEK2, BRCA1, Lynch genes, others

                                       (Pritchard, NEJM, 2016)

                                                       36
Inherited Pathogenic Mutations
And Metastatic Prostate Cancer

                   (Pritchard, NEJM, 2016)
Other Genes And Prostate Cancer

• Multicenter registry study of men with prostate cancer,
  unselected for age, family history, or Gleason score

• Localized prostate cancer – 499 patients
      • 4.6% had a pathogenic mutation (P < 0.001)

                                        (Pritchard, NEJM, 2016)

                                                        38
David
•   Prostate cancer (Gleason 3+4=7) diagnosed at age 60
•   PSA 4.8, no adverse features
•   No family history of prostate cancer
•   Active surveillance was undertaken
                                                                               76

                                                         Pancreas
                                                            62

               No Cancers

                                                    68                 66            63
                                               Breast 44            Melanoma
                                                                       45

                             62           60                   56
                  64                     Prostate
                                                                                39
David
•   Prostate cancer (Gleason 3+4=7) diagnosed at age 60
•   PSA 4.8, no adverse features
•   No family history of prostate cancer
•   Active surveillance was undertaken
                                                                               76
      Does he meet
     NCCN criteria for                                   Pancreas
        testing?                                            62

                 No Cancers

                                                    68                 66            63
                                               Breast 44            Melanoma
                                                                       45

                              62          60                   56
                     64                  Prostate
                                                                                40
David
2 years later:

• PSA was up to 9.5, but David remained asymptomatic

• Radical prostatectomy, now with positive pelvic
  nodes (Gleason evolved to 4+4=8)

• PSA dropped to zero appropriately

                                                    41
David
4 years later:

• PSA remained zero, but he developed low back pain,
  and a bone scan was suggestive of metastatic disease

• Exam showed a right breast mass, which biopsy proved
  to be invasive ductal cancer
• Mastectomy, spine radiation, and tamoxifen

• Still no consideration of genetic testing

                                                  42
David – The Sister
Soon thereafter, his sister was diagnosed with
breast cancer, and she underwent genetic testing

                                                                     76

                                               Pancreas
                                                  62

       No Cancers

                                         72                  70           67
                                        Breast 44         Melanoma
                                                             45

                     66           64                 60
          68                     Prostate 60
                                                     Breast 60
                                 Breast 64
                                                                           43
David – The Sister
Genetic testing using a broad 28-gene
panel revealed a mutation in BRCA2

                                                                    76

                                              Pancreas
                                                 62

      No Cancers

                                        72                  70           67
                                       Breast 44         Melanoma
                                                            45

         68         66           64
                                Prostate 60
                                                   +   60
                                                       Breast 60
                                Breast 64
                                                                          44
David – The Rest

                                                                      76

                                                Pancreas
                                                   62

No Cancers

                                 +    72
                                                       +      70           67
                                     Breast 44             Melanoma
                                                              45

   68           66        +    64
                              Prostate 60
                                                 +    60
                                                      Breast 60
                              Breast 64

                +    40                     +    36

                                                                                45
Approximate Lifetime Cancer Risks
Associated with Lynch Syndrome*
        •    Colorectal 50-80%
        •    Endometrial 25-60%
        •    Ovary 4-24%
        •    Stomach 3-13%
        •    Urothelial 1-7%
        •    Biliary/Pancreas 1-6%
        •    Small intestine 3-6%
        •    CNS (GBM) 1-3%
        •    Breast, Prostate, Bladder (not yet quantified)
 *(NCCN 2016 – risks vary according to the gene affected)
s.

     FAP
     LYNCH

     AVERAGE
Epidemiology of Colorectal Cancer

Lynch (3%)
FAP (< 1%)
MAP (< 1%)
Others (? %)   ≈8000 New Cases/Year
Lynch Syndrome
     Accelerated Timeline For CRC
• Genomic instability in Lynch syndrome greatly accelerates
  the timeline from colon polyp to CRC
• Instead of the usual 7-10 years, it may be only 1-3 years

• Beware of the colon cancer that seemed to come out of
  nowhere, within 2-3 years of a normal colonoscopy

• This is not only the basis for the annual colonoscopy
  recommendation, but also an important clue to underlying
  Lynch syndrome
Colorectal Cancer Phenotype:
    Sporadic                 Lynch

• Avg age 60-65         • Avg age 45-55
• 2/3 left-sided        • 2/3 right-sided
• Variable histology    • Mucinous, signet ring
• Slow evolution from   • Rapid evolution from
  polyp to cancer         polyp to cancer
• Microsatellite        • Microsatellite
  instability 10-12%      instability 90%
“Red Flags” For Lynch Syndrome

• F - Any patient with a Lynch cancer and a suspicious family
  history of other Lynch cancers (3 cancers within 3 degrees)
• A - ANY pt diagnosed with CRC or uterine cancer by age 50
• M - ANY pt with multiple Lynch cancers, regardless of age

• P - Any colon or uterine cancer with typical Lynch phenotype:
       • Right-sided CRC (proximal to splenic flexure)
       • Lynch histology features (any one): Mucinous, signet
         ring, lymphocytic infiltrate
       • Loss of expression of a mismatch repair protein by IHC
“Pink Flags” For Lynch Syndrome

  • Cancer of the ureter or renal pelvis (transitional)

  • Adenocarcinoma of the small intestine

  • Development of colorectal cancer less than three
    years out from a clean colonoscopy

  • Sebaceous skin tumors (adenomas, carcinomas)
        • Muir-Torre syndrome
Diagnostic Tools For Lynch Syndrome
  Tumor Testing:
  • Microsatellite Instability (MSI)
  • Immunohistochemistry (IHC) for MMR proteins
     • Useful for automatic screening of all CRC patients
       at the pathology level

  Germline DNA Testing:
  • Direct DNA analysis of one or more of the five genes
  • This is the only way to diagnose LS, and the only way
    to track the mutation through the family
Microsatellite Instability (MSI)
• MSI is a functional test
• Detects the failure of mismatch repair in the malignant clone
  compared to the normal tissue
• Confusing nomenclature: abnormal reported as “MSI-High”
• 10-12% of all CRC tumors are MSI-high
• This test is NOT DIAGNOSTIC of Lynch syndrome, and is only
  20% specific (ie, 80% have a different underlying cause
  which is somatic, not hereditary)
• 90% sensitive for LS
Immunohistochemistry (IHC)
• Performed on the cancer tissue, looking for the presence or
  absence of the four mismatch repair proteins in the tumor
• Theoretically, the defective gene will not produce the
  corresponding MMR protein
• An abnormal test is NOT DIAGNOSTIC of Lynch syndrome,
  particularly if the missing protein is MLH1
• Similar to MSI, IHC is 20% specific and 90% sensitive for LS,
  but the 10% it misses is not the same 10% that MSI misses –
  together the tests are about 97% sensitive
• Useful for screening population groups with colon and
  endometrial cancer
BRAF V600E and MLH1 Inactivation
• V600E is a somatic mutation in the BRAF gene that develops
  in the tumor of some patients with CRC
• This mutation can indirectly inactivate the MLH1 gene, and
  thus lead to the tumor expressing microsatellite instability or
  loss of the MLH1 protein on IHC
• This phenomenon occurs in 10-12% of all CRC’s, and can be
  associated with improved overall prognosis

• If IHC shows loss of MLH1 in the absence of a strong family
  history of Lynch cancers, the next step is to do BRAF testing on
  the tumor
Germline DNA Testing
• Performed on blood or saliva

• Testing for inherited mutations in any of the five Lynch genes
  that would render that gene defective, and therefore unable
  to produce the corresponding MMR protein

• This is the only way to confirm the diagnosis of LS, and the
  only way to track a mutation through the family
Screening For Lynch Syndrome:
      The Pathology Approach
• If MSI or IHC is abnormal, further evaluation is warranted
  depending on family history and the protein that is
  missing:

• No family history with absent MLH1 leads to BRAF testing
• No family history with absence of a non-MLH1 protein
  leads to DNA testing of the corresponding gene
• Suspicious family history will cause most clinicians to
  proceed directly to full Lynch testing
Lynch Syndrome Algorithm:
     The Universal Pathology Approach
           ALL CRC And
           Endometrial
                                           Automatic
              Cancer
                                           Pathology
             Patients
                                           Screening:
                                              IHC
                               LH1
                             M         )                       No
                        sent      adic           Absent          rm
                    A b       po r                                 al
                           % s                   MSH2, MSH6,
 BRAF (Colon) or       (80                       or PMS2
Hypermethylation
  (Endometrial)                                          Suspicious      Family Cancer
                                                                        History Analysis
               Negative                                                           OK
                                           DNA Testing
                                                                         Unlikely to be
    Positive
                                                                        Lynch Syndrome
NCCN Guidelines For Lynch Testing
• Personal history of CRC or endometrial cancer:
      • by age 50
      • at any age, plus a second Lynch cancer at any age
      • at any age, plus
          – One 1st or 2nd degree relative with any Lynch cancer by 50, or
          – Two 1st or 2nd degree relatives with any Lynch cancer at any age
      • At any age, with evidence of MMR deficiency by either
        MSI or IHC testing of the tumor
• Personal history of any Lynch cancer and a > 5% probability of
  having Lynch based on predictive computer model (eg, PREMM)
NCCN Guidelines For Lynch Testing In
 Patients Who Don’t Have Cancer
• First degree relative with CRC or endometrial cancer < 50
• First degree relative with CRC or endometrial cancer PLUS a
  second Lynch cancer, regardless of age

• Two 1st or 2nd degree relatives with any Lynch cancer, with at
  least one cancer prior to age 50
• Three 1st or 2nd degree relatives with any Lynch cancer,
  regardless of age

• > 5% probability of having Lynch syndrome based on one of
  the predictive computer models (PREMM5, others)
Impact of Broad Multi-Gene Panels

• There is much more clinical overlap among the various
  syndromes than previously realized

• Taken as a group, numerous clinical studies show that the
  traditional syndromic approach will miss more than one
  third of the pathogenic mutations found using broad
  multigene panels

• Studies have also shown that disease-specific panels still
  miss 10-20% of clinically actionable mutations
Spectrum of Malignancies In
                A Broad 28-Gene Panel
           GENES                Breast Ovary Colon Panc Prost Uterus Gastric   Mel    Other

         BRCA1, BRCA2             X     X            X     X                    X
              TP53                X     X      X     X     X     X      X       X         X
              PTEN                X            X                 X                        X
             STK11                X     X      X     X           X      X                 X
          PALB2, ATM              X                  X     X
             CDH1                 X            X                        X
             CHEK2                X            X           X
          BARD1, NBN              X                        X
        RAD51C, BRIP1             ?     X
MLH1, MSH2, MSH6, PMS2, EPCAM     ?     X      X     X     X     X      X                 X
     APC, SMAD4, BMPR1A                        X     X                  X                 X
            MUTYH                              X                                          X
      POLD1, POLE, GREM1                       X
            RAD51D                      X                  ?
        CDKN2A, CDK4                                 X                          X

                                                                                     63
A Broad 28-Gene Panel And
            Guidelines For Management
           GENES                Breast Ovary Colon Panc Prost Uterus Gastric   Mel    Other

         BRCA1, BRCA2             X     X            X     X                    X
              TP53                X     X      X     X     X     X      X       X         X
              PTEN                X            X                 X                        X
             STK11                X     X      X     X           X      X                 X
          PALB2, ATM              X                  X     X
             CDH1                 X            X                        X
             CHEK2                X            X           X
          BARD1, NBN              X                        X
        RAD51C, BRIP1             ?     X
MLH1, MSH2, MSH6, PMS2, EPCAM     ?     X      X     X     X     X      X                 X
     APC, SMAD4, BMPR1A                        X     X                  X                 X
            MUTYH                              X                                          X
      POLD1, POLE, GREM1                       X
            RAD51D                      X                  ?
        CDKN2A, CDK4                                 X                          X

                                                                                     64
Janice
• 55-yr-old woman with ER+ invasive ductal cancer, 1.5 cm

• Family history:
      • Mother ovarian ca 48
      • Maternal aunt breast ca 57, colon ca 68
      • Maternal uncle pancreas cancer 70
      • Maternal great aunt uterine cancer 49
Janice

             Uterus 49

     76
            Ovary 48     Breast 57   Pancreas 70   78
                         Colon 68

52                             59
            Breast 55

                                                    66
Janice
Hereditary syndromes to consider:

     • BRCA (2 breast, 1 ovary, 1 pancreas)
     • Lynch (1 colon, 1 uterus, 1 ovary, 1 pancreas)
     • Cowden (2 breast, 1 uterus)
Janice
• Hereditary syndromes to consider:

      • BRCA (2 breast, 1 ovary, 1 pancreas)
      • Lynch (1 colon, 1 uterus, 1 ovary, 1 pancreas)
      • Cowden (2 breast, 1 uterus)

• 28-gene panel revealed a pathogenic mutation in MSH2
Janice – The Rest

                 Uterus 49

                                                       Neg
           76
                Ovary 48     Breast 57   Pancreas 70         78
                             Colon 68

                             Neg   59
Neg 52          Breast 55

                                                              69
Key Takeaway Points

• Hereditary syndromes are more common than most realize,
  and this is now also true for hereditary prostate cancer

• Underlying genetic trait affects not only future cancer risk, but
  also may affect optimal management of the cancer at hand
Key Takeaway Points

• Hereditary forms of prostate cancer may be biologically
  aggressive, and this may be important in medical decision-
  making

• Similar to hereditary breast and ovarian cancers, hereditary
  prostate cancer may be uniquely sensitive to the effects of
  PARP inhibitors and other drugs that may not be effective in
  non-hereditary cases
Key Takeaway Points

• Lynch syndrome is terribly under-recognized, yet it is just as
  common as BRCA, has cancer risks just as high as BRCA, and
  the cancers are just as preventable as those in BRCA

• Universal pathology screening of ALL colorectal and
  endometrial cancers with IHC for the four Lynch proteins is
  now considered standard of care, and should also be
  considered for survivors of these cancers
Key Takeaway Points

• Puzzle-solving with a broad multigene panel is simple and
  straightforward, particularly for providers with little
  background in genetics. Single syndrome testing leaves too
  many pathogenic mutations undiagnosed

• You should systematically screen your survivor and non-
  cancer population as well, particularly survivors of breast,
  colorectal, prostate, and endometrial cancers
Key Takeaway Points
• 15% for BRCA and 5% for Lynch after 20 years is a statistic that
  should be embarrassing to providers, but is also potentially
  life-threatening to their patients

• This is a quality of care issue – genetic evaluation of
  appropriate patients can no longer be optional

• Every doctor, nurse, and other members of the healthcare
  team has a potential role to play in finding these patients, and
  helping to prevent the cancers that were destined to occur
Comprehensive Quality Cancer Care
                      Elements
       Genetics and                  Diagnostics
    Risk Management

  Survivorship                              Surgery

         Clinical                         Radiation
        Research
                      Drug Therapy
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