Presence of EBV antigens detected by a sensitive method in pediatric and adult Diffuse Large B-cell lymphomas.

In 2017, the World Health Organization (WHO) confirmed a new entity, Epstein Barr virus (EBV) + Diffuse large B cell lymphoma (DLBCL), not otherwise specified (NOS). Traces of EBV transcripts were described in lymphomas, including DLBCL, that were diagnosed as EBV negative by conventional methods. The aim of this study was to detect viral genome by qPCR, as well as LMP1 and EBNA2 transcripts, with a more sensitive method in DLBCL cases from Argentina.

[ASIA syndrome: breast implant and Still's disease].

Connective tissue diseases associated with silicone breast implants have been widely discussed. In the last decade, siliconosis has been included in the autoimmune/inflammatory syndrome induced by adjuvants (ASIA) next to Gulf War syndrome, macrophage myofascitis and postvaccination phenomena. The ASIA syndrome may appear as lupus, rheumatoid arthritis, or more rarely, as adult Still's disease.

[AIDS related lymphomas: Histopathological subtypes and association with Epstein Barr virus and Human Herpes virus type-8].

Non-Hodgkin lymphomas (NHL) of the B-cell type are the second most common neoplasm among patients with human immunodeficiency virus (HIV) infection and AIDS. Here, we evaluated 48 cases of AIDS-related lymphomas (ARL) diagnosed at the Histopathological Division of the Instituto de Investigaciones Hematológicas of the National Academy of Medicine. Five were females and 43 were males with a median of age of 37 years at the time of the diagnosis.

Unusual case of plasmablastic non-Hodgkin's lymphoma located in the liver. First case reported in an AIDS patient.

Plasmablastic lymphoma is a rare and a relatively new entity that was first described in the jaws and the oral cavity of HIV-AIDS patients. We report a case of plasmablastic lymphoma involving the liver in an AIDS patient. Plasmablastic lymphoma is considered a diffuse large B-cell lymphoma with a unique phenotype and predilection for the oral cavity.

Extranodal oral non-Hodgkin's lymphomas. A retrospective study of 40 cases in Argentina.

A retrospective study was conducted of extranodal oral Non-Hodgkin's Lymphomas diagnosed at the Surgical Pathology Laboratory of the School of Dentistry at Buenos Aires University, Argentina, between 1985 and 2004. The 40 cases found represent 0.2% of the oral biopsies diagnosed during that time and 4.

[Ileocolic intussusception due to a large B cell lymphoma in a patient with AIDS].

Adult intussusception is rare. Here, we describe a case of an AIDS adult patient who developed an ileocolic intussusception secondary to a large B cell lymphoma of the cecum. Surgical findings included the ileon free of the tumor and invaginated within the cecum with infiltrating neoplasm.

Burkitt's lymphoma of the duodenum in a patient with AIDS.

Non-Hodgkin's lymphoma of B-cell type is the second most common neoplasm after Kaposi's sarcoma, among patients with human immunodeficiency virus infection. Most non-Hodgkin's lymphoma cases that are associated with acquired immunodeficiency syndrome involve extranodal sites, especially the digestive tract and the central nervous system. We report a case of primary lymphoma of the duodenum in a patient with AIDS.

[Non-Hodgkin's lymphomas of the digestive tract and anexal glands in AIDS patients].

Background: Non-Hodgkin's lymphoma (NHL) is the second most common neoplasm among patients with AIDS. One of the major clinical characteristics of AIDS-associated NHL is the high frequency of extra-nodal involvement, including the gastrointestinal tract, at initial presentation.

Methods: From January 1997 to December 2004, 8 cases of NHL of the digestive tract and anexal glands (liver and parotid gland) were observed at the HIV/AIDS division of the Infectious Diseases FJ Muñiz Hospital from Buenos Aires, Argentina.

Structural aberrations of chromosomes 17 and 12 in chronic B-cell disorders.

Objectives: Genomic aberrations can now be identified in approximately 80% of chronic lymphocytic leukemia, small lymphocytic lymphoma (CLL/SLL) patients. In the present study, four new structural changes involving chromosomes 17 and 12 in CLL/SLL patients are described.

Methods: Five patients were selected for inclusion in the present report among a total of 92 cases with diagnosis of CLL/SLL.