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Brazilian Journal of Infectious Diseases

Print version ISSN 1413-8670On-line version ISSN 1678-4391

Braz J Infect Dis vol.13 no.1 Salvador Feb. 2009

http://dx.doi.org/10.1590/S1413-86702009000100002 

BRIEF COMMUNICATIONS

 

Clinical, endoscopic and prognostic aspects of primary gastric non-hodgkin's lymphoma associated with acquired immunodeficiency syndrome

 

 

Rosamar Eulira Fontes RezendeI,II; Marcos MantelmacherI; Sandro da Costa FerreiraI; Elodie Bomfim HyppólitoII; Alcyone Artioli MachadoIII; José Celso ArdenghII; José Luiz Pimenta MódenaII

IDepartment of Medicine, Division of Gastroenterology, School of Medicine of Ribeirão Preto, University of São Paulo (FMRP-USP)
IIEndoscopy Service, School of Medicine of Ribeirão Preto, University of São Paulo (FMRP-USP)
IIIDepartment of Medicine, Division of Infectious and Tropical Diseases, School of Medicine of Ribeirão Preto, University of São Paulo (FMRP-USP); Ribeirão Preto, SP, Brazil

Address for correspondence

 

 


ABSTRACT

Primary gastric non-Hodgkin's lymphoma (NHL) is a co-morbidity that can be observed during the clinical course of acquired immunodeficiency syndrome (AIDS). We evaluated the prevalence, clinical-evolutive aspects and form of endoscopic presentation of primary gastric NHL associated with AIDS. Two hundred and forty-three HIV patients were submitted to upper digestive endoscopy, with evaluation of clinical, endoscopic and histological data. A CD4 count was made by flow cytometry and viral load was determined in a branched-DNA assay. Six cases (five men; mean age: 37 years; range: 29-46 years) of primary gastric NHL were detected. The median CD4 count was 140 cells/mm3 and the median viral load was 40,313 copies/mL. Upper digestive endoscopy revealed polypoid (in four patients) ulcero-infiltrative (two patients) and ulcerated (two patients) lesions and combined polypoid and ulcerated lesions (two patients). Histology of the gastric lesions demonstrated B cell NHL (four patients) and T cell NHL (two patients). Five of the six patients died of complications related to gastric NHL. We concluded that primary gastric NHL is an important cause of mortality associated with AIDS.

Key-Words: Non-Hodgkin lymphoma, AIDS, stomach, upper digestive endoscopy.


 

 

The immunosuppression triggered by acquired immunodeficiency syndrome (AIDS) predisposes to a series of opportunistic infections and neoplasias, such as Kaposi's sarcoma and non-Hodgkin's lymphoma (NHL) [1,2]. Individuals infected with human immunodeficiency virus (HIV) are at high risk to develop NHL; i.e., they are about 50 times more likely to develop NHL than the HIV-negative population [3,4].

NHL is a common complication in the late phase of HIV infection, with a high frequency of involvement of the gastrointestinal tract (GIT) [2,5]. The occurrence of primary GIT NHL has been associated with reduced survival of HIV-infected patients [3,6]. Highly active antiretroviral therapy (HAART) seems to have a protective effect against the onset of NHL associated with HIV[4,7].

We evaluated the prevalence of primary gastric NHL in 243 HIV-infected patients submitted to upper digestive endoscopy (UDE) from August 1995 to May 2005 in the Service of Digestive Endoscopy of the Special Unit for the Treatment of Infectious Diseases of the University Hospital, Faculty of Medicine of Ribeirão Preto, to assess the clinical-evolutive aspects and forms of endoscopic presentation of primary gastric NHL associated with AIDS. Clinical data were obtained concerning age, sex, risk factors for HIV acquisition, symptoms related to gastric involvement by NHL, use of HAART, survival time, and mortality data. CD4 counts were made by flow cytometry and HIV load was determined by the branched DNA (bDNA) assay six months before the UDE exam. The form of presentation and the location of NHL in the stomach were determined by videogastroscopy [Pentax Model EG 2901 (9.8 mm)].

Fragments of the gastric lesions obtained by endoscopy were evaluated by two experienced pathologists of the service. The material was stained with hematoxylin-eosin and examined by immunohistochemistry with markers for B and T cells. Primary gastric NHL was detected in six of the 243 HIV-positive patients (2.5%) submitted to UDE in our service.

Five of these patients were male; patient age ranged from 29 to 46 years (mean: 37 years) The risk factors for HIV infection detected in patients with primary gastric NHL were sexual for four of the six cases and intravenous drug use for two patients. Median time between diagnosis of HIV and the appearance of NHL was 42 months (range: 8-96 months). Only three patients were using HAART before the diagnosis of NHL.

Median CD4 count was 140 cells/mm3 (range: 55 to 326 cells/mm3) and median viral load was 40,313 copies/mL (range: 50 to 1,200,000 copies/mL), measured in blood collected up to six months before UDE. The main complaints reported by the patients with NHL that led to the indication of UDE were epigastric pain in four cases, nausea and vomiting in two cases, and hematemesis in one case.

All six patients with gastric NHL presented lesions in the gastric region. Concomitant lesions in the fundus were found in three cases and there was involvement of the antrum in two cases. The UDE revealed a polypoid lesion in four cases (Figure 1a), ulcero-infiltrative lesions in two cases (Figure 1b), and ulcerated lesions in two cases (Figure 1c), with combined polypoid and ulcerated lesions observed in two cases (Figure 1d). Histology of the gastric lesions demonstrated B cell NHL in four cases and T cell NHL in two.

Five patients died of complications related to gastric lymphoma. The median survival time after the diagnosis of NHL was 185 days (range: 11 to 600 days). None of the patients who died had received specific chemotherapy. The most common causes of death were bacterial pneumonia in three cases and acute renal failure in two cases. Only one patient was still alive at the time we prepared this article, with a survival time of two years and 10 months. This patient had been submitted to three sessions of specific chemotherapy and continues to be clinically followed up, with no indication of cure of lymphoma thus far.

Lymphomas are common tumors in HIV-infected patients and, together with Kaposi's sarcoma, are responsible for approximately 95% of the neoplasias associated with AIDS [6,8]. Gastrointestinal tract (GIT) involvement by NHL is frequent in HIV-positive individuals, occurring in 15% to 75% of all cases [1,2,9-13]. In this population, the GIT sites most frequently involved are the stomach (24% of cases), the small bowel (10% of cases), and the colon and rectum (7% of cases) [2,5,6]. The frequency distribution of GIT involvement by NHL in immunocompetent patients is similar, even more frequent in the stomach (50% to 80% of cases) and rarely affecting the small intestine, colon and perianal region [2,5,14]. In our study, among the 243 HIV-positive patients evaluated by UDE, six (2.5%) had primary gastric NHL. All six patients had involvement of the gastric body, with involvement of the fundus in three cases and also of the antrum in two cases.

Involvement of the gastrointestinal tract by NHL frequently causes specific symptoms, the most common being abdominal pain, weight loss, and gastrointestinal bleeding. In our series, the main complaints of the patients were epigastric pain, nausea and vomiting. Hematemesis occurred in only one case.

AIDS-associated NHL are usually high-grade B-cell lymphomas; most of them are of extranodal origin [1,2]. Our histological findings revealed B cell NHL in four of the six cases and T cell NHL in two cases.

There are reports that the prognosis of gastrointestinal NHL is poor in patients with AIDS, with a survival of approximately six months [1,13,15]. We found a similar mean survival of about 185 days. A combination of chemotherapeutic agents is the treatment of choice for NHL. However, the rate of response to chemotherapy is normally low, usually less than 40% [2,16,17].

The presence of high CD4 counts and of polyclonal lymphomas, and the absence of Epstein-Bar virus infection and of AIDS-defining disease before diagnosis are associated with improved survival of these patients [2,10,11,16-19]. We conclude that NHL is a common complication occurring in the late phase of HIV infection, with a high frequency of stomach involvement. Despite all the advances in diagnosis and therapy, the occurrence of primary gastrointestinal NHL associated with HIV has been associated with reduced patient survival, being an important cause of AIDS-associated mortality.

 

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Address for correspondence:
Dr. Rosamar Eulira Fontes Rezende
MD. Departamento de Clínica Médica
Divisão de Gastroenterologia
Faculdade de Medicina de Ribeirão Preto-USP
Av. Bandeirantes, 3900, Monte Alegre
Zip code: 14048-900. Ribeirão Preto-SP-Brazil
Phone: +55 16 602 2456. Fax: + 55 16 633 1144
E-mail: rosamarrezende@uol.com.br.

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