Linfomas en pacientes con VIH: una asociación compleja y frecuente. Revisión narrativa de la literatura / HIV-related lymphomas: a complex and frequent association. A narrative review of the literature

En Colombia, la infección por el virus de la inmunodeficiencia humana (VIH) es una epidemia en aumento. Ante la mejoría de la supervivencia general con la terapia antirretroviral altamente efectiva, la aparición de neoplasias malignas ha ido desplazando las complicaciones infecciosas como principal problema en esta población. Los linfomas no Hodgkin son las neoplasias malignas definitorias de síndrome de inmunodeficiencia adquirida (SIDA) más frecuentes después del sarcoma de Kaposi, siendo el linfoma B difuso de células grandes y el linfoma de Burkitt las variantes más comunes; por otra parte, el riesgo de desarrollar linfoma de Hodgkin clásico es 5 a 20 veces mayor en pacientes positivos para VIH en comparación con la población general. Realizar un diagnóstico temprano es un reto, debido a infecciones oportunistas y a la presentación atípica de la enfermedad en este grupo de pacientes. El tratamiento de la enfermedad también supone un desafío debido a las comorbilidades y el estado funcional de los pacientes al momento del diagnóstico; sin embargo, en conjunto con esquemas combinados de quimioterapia y al uso concomitante de la terapia antirretroviral, se ha mejorado considerablemente el pronóstico, el cual actualmente se acerca al de los pacientes seronegativos. Por medio de esta revisión, se pretende describir las principales características de los linfomas asociados al VIH, de tal forma que permita a los trabajadores en salud, tener mayores elementos para el abordaje integral de esta población en nuestro país

In Colombia, human immunodeficiency virus (HIV) infection is a growing epidemic. Given the improvement in overall survival with highly effective antiretroviral therapy, cancer has been displacing infectious complications in this population. Non-Hodgkin's lymphoma is the most common AIDS defining malignancy after Kaposi's sarcoma. Diffuse large B-cell lymphoma and Burkitt's lymphoma are the most common variants; meanwhile, the risk of developing classical Hodgkin lymphoma is 5 to 20-fold higher compared to HIV-negative individuals. Making an early diagnosis is a challenge, due to opportunistic infections and the atypical presentation of the disease in this group of patients. Treatment of the disease is also a challenge given the comorbidities and patient condition at diagnosis; however, in conjunction with combined chemotherapy regimens and the concomitant use of antiretroviral therapy, the outcome of patients with AIDS-related lymphomas has significantly improved, currently approaching that of seronegative patients. The aim of this review article is to describe the main characteristics of the disease, in such a way that it allows health workers to have more elements for a comprehensive approach in patients with AIDS-related lymphomas in our country

A Case of Rectal Squamous Cell Carcinoma with Metachronous Diffuse Large B Cell Lymphoma in an HIV-Infected Patient / 감염과화학요법

Diffuse large B cell lymphoma (DLBCL) is one of the most common acquired immune deficiency syndrome (AIDS)-defining malignancies among human immunodeficiency virus-infected patients, and rectal cancer has recently emerged as a prevalent non-AIDS-defining malignancy. We report a case of rectal squamous cell carcinoma that was metachronous with DLBCL in an HIV-infected patient who was receiving highly active antiretroviral therapy. The patient was diagnosed with DLBCL and showed complete remission after chemotherapy. Follow-up imaging showed increased uptake at the rectum, previously treated as lymphoma. Repeated biopsy was performed and squamous cell carcinoma of the rectum was reported. After concurrent chemoradiation therapy, curative resection was performed.

Expression of immunohistochemical markers in patients with AIDS-related lymphoma

AIDS-related lymphomas (ARL) present high biological heterogeneity. For better characterization of this type of lymphoma, the objectives of the present study were to evaluate the expression of immunohistochemical markers of cell differentiation (CD10, Bcl-6, MUM-1) and determine cell origin profile according to Hans' classification of diffuse large B-cell lymphoma in AIDS patients. This study included 72 consecutive patients with ARL diagnosed at the University Hospital, Universidade Federal do Rio de Janeiro (UFRJ) and at the Brazilian Instituto Nacional de Câncer (INCA) from 2000 to 2006. The morphologic distribution of the lymphomas was the following: 61 percent were diffuse large B-cell lymphomas (DLBCLs), 15 percent were Burkitt's lymphomas, 13 percent were plasmablastic lymphomas, 10 percent were high-grade lymphomas and 1 percent was follicular lymphoma. The positivity for each immunohistochemical marker in DLBCLs, Burkitt's lymphoma and plasmablastic lymphoma was respectively: CD20, 84 percent, 100 percent, and 0; CD10, 55 percent, 100 percent, and 0; Bcl-6, 45 percent, 80 percent, and 0; MUM-1, 41 percent, 20 percent, and 88 percent. A higher positivity of CD20 (84 percent x 56 percent, p = 0.01) was found in DLBCL compared to non-DLBCL; in Burkitt's lymphomas a higher positivity of CD10 (100 percent x 49 percent, p = 0.04) and Bcl-6 (80 percent x 39 percent, p = 0.035) were found compared to non-Burkitt's lymphomas. Germinal center (GC) profile was detected in 60 percent of DLBCLs. Our study suggests particular findings in ARL, as the most frequent phenotype was GC, different from HIV-negative patients.