Primary Gastric Non-Hodgkin Lymphoma as Second AIDS-Defining Malignancy in a Patient under - HAART

 
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Primary Gastric Non-Hodgkin Lymphoma as Second AIDS-Defining Malignancy in a Patient under - HAART
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                                                                                                           Annals of Clinical Pathology
Case Report                                                                                              *Corresponding author
                                                                                                         Marcelo Corti, Division of HIV/AIDS, Infectious Diseases

Primary Gastric Non-Hodgkin                                                                              F. J. Muñiz Hospital, Puán 381, 2°floor, Buenos Aires,
                                                                                                         Argentina, Email: marcelocorti@fibertel.com.ar

Lymphoma as Second AIDS-Defining
                                                                                                         Submitted: 01 September 2020
                                                                                                         Accepted: 14 September 2020
                                                                                                         Published: 15 September 2020

Malignancy in a Patient under                                                                            ISSN: 2373-9282
                                                                                                         Copyright
                                                                                                         © 2020 Corti M, et al.

HAART                                                                                                      OPEN ACCESS

                                                                                                         Keywords
Marcelo Corti1*, Astrid Pavlosky2, and Marina Narbaitz3
                                                                                                         • Primary gastric lymphoma; Diffuse large B cell
1
  Division of HIV/AIDS, Muñiz Hospital, Argentina                                                          lymphoma; AIDS; HIV
1
  Department of Medicine, University of Buenos Aires, Argentina
2
  Medical Director, Pavlosky Hematology Center, Argentina
3
  National Academy of Medicine, Histopathology Laboratory, Argentina

    Abstract
         Primary gastric non-Hodgkin lymphoma is a severe complication during the clinical course of human immunodeficiency virus infection. Clinical presentation
    includes symptoms associated with the upper digestive tract and “B” symptoms (fever, night sweats and weight loss). Endoscopic findings can reveal polypoid,
    ulcero-infiltrative or ulcer lesions. Multiple biopsy smears are necessary to determine histopathological subtypes. Diffuse large B cell lymphoma (DLBCL) is the
    most common histopathological subtype in HIV/AIDS patients followed by Burkitt’s lymphoma and plasmablastic lymphoma. Chemotherapy plus highly active
    antiretroviral therapy is the best treatment to achieve a complete remission with prolonged survival in this kind of patients.
         Here we present an HIV seropositive patient who developed a primary gastric DLBCL as second AIDS-defining neoplasm during HAART therapy and
    after three years of successfully controlling HIV-viral load. Patient presented with a past history of anal squamous cell carcinoma several years before and
    gastro esophageal reflux disease treated for a long time with omeprazole. He presented with epigastric pain, nausea and dyspepsia. Upper gastrointestinal
    endoscopy showed erosive gastritis and a large gastric ulcer at the minor gastric curvature. Microscopy examination and immunohistochemistry of the biopsy
    smears of the large ulcer biopsy confirm the diagnosis of primary gastric DLBCL. He was treated with HAART plus chemotherapy with a complete remission for
    a time of three years.

INTRODUCTION                                                                          CASE REPORT
    Non-Hodgkin lymphoma (NHL) is a common complication                                   A 64-year-old man with a large history of HIV infection and
of the disease caused by the human immunodeficiency virus                             under HAART presented with unspecific abdominal symptoms
(HIV). The involvement of the digestive tract, from the oral                          of a month of evolution. The patient referred episodic epigastric
cavity to the anus region, is very frequent [1,2]. One of the most                    pain, postprandial fullness, nausea, eructation and breathe
                                                                                      odor. He denied history of fever and night sweats but the
common characteristic of AIDS-associated NHL is the extranodal
                                                                                      clinical manifestations were associated with a weight loss of 5
compromise at the time of diagnosis. Gastrointestinal tract (GIT)
                                                                                      kg. The patient had history of a numerous episodes of H. pylori
is the most commonly site of primary extranodal lymphomas,                            infection and erosive/ulcerative gastritis. He was treated in all
including 40% to 50% of all cases [3-6].                                              episodes with different antimicrobial regimens. Six years before,
    In the GIT, stomach is the most frequent site of involvement                      on antiretroviral treatment, with undetectable viral load and
(50% to 88%) followed by the small intestine (14% to 38%) and                         immunological reconstitution, he was diagnosed with intra-
                                                                                      anal squamous cell carcinoma associated with HPV-16. He was
the colon (10% to 20%) [4-7,8]. GIT involvement is also frequent
                                                                                      treated with HAART plus chemotherapy based on Nigro’s scheme
in HIV-infected patient’s account 15% to 75% of all cases [9-11].
                                                                                      plus tridimensional radiotherapy with a complete remission and
     Here we present a patient infected with HIV who developed                        without relapse during 10 years.
a primary gastric NHL during highly active antiretroviral therapy                        Her physical examination revealed no abdominal findings,
(HAART) with immune reconstitution and undetectable viral                             no hepatomegaly, no splenomegaly and no lymphadenopathy.
load. Patient was treated with the same scheme of HAART                               Laboratory tests were normal including LDH levels. The CD4-
plus chemotherapy with a prolonged survival and a complete                            T-cell count was 173 cells/uL and the plasma viral load was
remission of the lymphoproliferative disorder.                                        undetectable. Upper gastrointestinal endoscopy was done and

Cite this article: Corti M, Pavlosky A, Narbaitz M (2020) Primary Gastric Non-Hodgkin Lymphoma as Second AIDS-Defining Malignancy in a Patient under
HAART. Ann Clin Pathol 7(1): 1154.
Primary Gastric Non-Hodgkin Lymphoma as Second AIDS-Defining Malignancy in a Patient under - HAART
Corti M, et al. (2020)

                                        

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showed erosive/ulcerative gastritis at the gastric roof and body.
Additionally, a large gastric ulcer at the minor gastric curvature
was observed (Figure 1). Several biopsy smears were taken and
revealed a chronic and active gastritis with H. pylori infection
positive. Microscopy examination of the biopsy smears of the
large ulcer biopsy showed a dense proliferation of atypical
lymphoid cells, of median and large-sized, eosinophilic cytoplasm
and one or various nucleoli infiltration of submucosa and
muscularis propriety (Figures 2 and 3). Immunohistochemistry
revealed that neoplastic cells were positive for CD20 (Figure 4),
BcL2 (+) with negative CD3 (Figure 5) and a Ki67 proliferation
index of 30% (Figure 6). Cytokeratin was also negative. Final
histopathological diagnosis was primary gastric diffuse large
B cell lymphoma (DLBCL). Thorax and abdominal tomography
scan to determine clinical stage were normal. Bone marrow
biopsy was done to stage the disease and was negative to atypical
lymphoid infiltration. He was treated with the same scheme of           Figure 2 Histology with H-E stain on the biopsy (×100) showing
HAART based on tenofovir plus emtricitabine, dolutegravir and           diffuse infiltration of submucosa and muscularis propria by lymphoid
darunavir boosted with ritonavir. Additionally, he received 6           neoplasm.
cycles of chemotherapy based on CHOP plus rituximab. Also, he
received trimethoprim-sulfamethoxazole as primary prophylaxis
for Pneumocystis jiroveci; granulocyte colony stimulating factor,
fluconazole and levofloxacin in each cycle.
    After 3 years of complete remission the patient developed a
new primary gastric DLBCL currently under chemotherapy and
antiretroviral treatment.

DISCUSSION
    Several recent studies have been reported an increased
incidence of both Hodgkin lymphoma and NHL in AIDS patients.
These patients, infected with HIV, are at high risk to develop NHL.
The risk of NHL is 100 to 300-fold higher in HIV infected patients
in comparison with the general population [11], being this the
second most frequent malignancy following Kaposi´s sarcoma
[12]. Primary gastrointestinal NHL is a distinct clinic-pathological
entity. Lymphomas represent only the 2% to 5% of all gastric
malignant tumors. The increase in the incidence of primary gastric      Figure 3 H-E (x 400) showing large atypical lymphoid cells with
lymphoma (PGL) in the last decades is related with the increase in      indented vesicular type of nucleus, prominent nucleoli, with scanty
the number of immunodeficiency patients, especially those with          eosinophilic cytoplasm and atypical mitosis.
HIV infection. Hernandez JA et al [13], detected 15 patients with
                                                                       PGL in a series of 76 patients with HIV-AIDS-related NHL. NHL of
                                                                       extranodal sites, as the digestive tract, is considered as primary
                                                                       when the extranodal compromise is equal or greater compared
                                                                       with the nodal involvement [14]. More than 90% of PGNHL are of
                                                                       B-cell phenotype and generally is not associated with peripheral
                                                                       adenopathy [13]. Clinical findings include abdominal pain,
                                                                       epigastric pain, early satiety, nausea, vomiting, gastrointestinal
                                                                       bleeding and B symptoms as fever, weight loss and night sweets.
                                                                       Generally, the endoscopic findings include thickening of gastric
                                                                       folds, tumor lesions, polypoid lesions, ulcerative lesions or the
                                                                       combination of these [2,16]. Fontes Rezende et al [2], in a series
                                                                       of 243 HIV-seropositive patients evaluated with upper digestive
                                                                       endocopic detected 6 patients (2,5%) with PGL. The endoscopic
                                                                       findings include the involvement of gastric body in all cases, with
                                                                       compromise of the fundus in 3 cases and also the gastric antrum
                                                                       in 2 others.
 Figure 1 Endoscopic findings at initial diagnosis showed a large         Histopathological biopsy smears must be classified
 ulcerated lesion at the minor gastric curvature (white arrow).        according with the Real and WHO classification [17]. Ann Arbor

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Primary Gastric Non-Hodgkin Lymphoma as Second AIDS-Defining Malignancy in a Patient under - HAART
Corti M, et al. (2020)

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classification with Mussohoff modification is used to the staging
of gastric lymphomas in I to IV stadiums. The IIA include gastric
lymphomas with proximal lymphatic nodules involvement and
IIB when the neoplasm also infiltration the distal nodal lymphatic
[18].
    Generally, AIDS-associated NHL are a high grade lymphomas
including DLBCL, Burkitt´s lymphoma (BL) and plasmablastic
lymphoma (PBL), as most frequent subtypes and which are
considered as an AIDS-defining illnesses [19]. These patients
are associated with a rapid progression of neoplasm disease,
frequent extranodal initial manifestations, poor prognosis and a
short survival after diagnosis [20].
    In the stomach, it is possible to show other type of lymphomas,
named as mucosa-associated lymphoid tissue (MALT) lymphoma.
MALT lymphoma is a low grade marginal zone B-cell lymphoma
strongly associated with Helicobacter pylori infection in his
                                                                       Figure 6 Ki 67 showed a high proliferation index.
pathogenesis. MALT lymphoma can occur at different extranodal
sites as the GIT. Within de gastric NHL, MALT lymphoma include
                                                                      around 60% and most of them has a better prognosis and
                                                                      regressed after H. pylori eradication treatment alone. Localized
                                                                      gastric DLBCL do not regress with the H. pylori treatment and
                                                                      eradication and need 4 to 6 cycles of chemotherapy [21].
                                                                          Actually, the best treatment of NHL in AIDS patients is
                                                                      based on the combination of highly active antiretroviral therapy
                                                                      (HAART) plus chemotherapy [22,23]. The survival of patients
                                                                      with AIDS-related NHL is significantly longer compared with
                                                                      the pre-HAART era, with high rates of complete remission and
                                                                      prolonged response to HAART, as we can see in our patient
                                                                      [14,15]. Prolonged survival is significantly associated with
                                                                      achievement of a complete remission and a good virological
                                                                      response to HAART [24]. In comparison with a median survival of
                                                                      7 months after NHL diagnosis in the pre-HAART era, the survival
                                                                      is prolonged in the post-HAART period [25,26]. HAART plus high
                                                                      intensity multi-agent chemotherapeutic regimens including the
                                                                      anti-CD20 monoclonal antibody rituximab is associated with
 Figure 4 Immunohistochemical staining revealed large atypical        a high remission rate in HIV associated-NHL [27]. The role of
 lymphoid cells positive by CD20 antibody.                            surgery is limited to cases of obstruction or uncontrollable
                                                                      bleeding. The spontaneous remission of aggressive lymphomas
                                                                      as DLBCL is extremely rare. Gattiker et al [28], in a retrospectively
                                                                      review of 209 cases of aggressive lymphomas including 69 cases
                                                                      of DLBCL showed no case of spontaneous remission of DLBCL.
                                                                      Watari et al [29], reported 2 cases of remission of gastric DLBCL
                                                                      without any treatment. Finally, Sugiyama et al [30], published a
                                                                      case of gastric DLBCL with a large spontaneous remission for 10
                                                                      years. Also, in the setting of HIV infection, it is possible to show a
                                                                      complete remission of NHL associated with HAART [31]. In this
                                                                      stage, is possible that the immune reconstitution based on HAART
                                                                      can play a role in the tumor remission without chemotherapy.
                                                                          In conclusion, HIV-positive patients have a high risk to
                                                                      develop lymphomas, especially NHL. Nevertheless, the risk has
                                                                      dropped gradually in the HAART era, especially in those with
                                                                      undetectable viral load and immune restoration.

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 Cite this article
 Corti M, Pavlosky A, Narbaitz M (2020) Primary Gastric Non-Hodgkin Lymphoma as Second AIDS-Defining Malignancy in a Patient under HAART. Ann Clin Pathol
 7(1): 1154.

 Ann Clin Pathol 7(1): 1154 (2020)
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