Lymphoid follicular hyperplasia in patients with systemic lupus erythematosus after multiple cycles of rituximab.

Rituximab is indicated in some patients with refractory systemic lupus erythematosus (SLE). Occasionally, this medication is required in chronic form to maintain control of the disease. We described two patients who developed lymphoid follicular hyperplasia (LFH) after multiple cycles of rituximab and evaluated the expression of B cell activating factor belonging to the tumor necrosis factor (TNF) family (BAFF) and its receptors [BAFF-receptor (BAFF-R) and B cell maturation antigen (BCMA)], as possible factors related to lymphoid node enlargement.

Ossifying Lipoma in Costal Arches That Suggest Extensive Pulmonary Involvement: Case Report.

Background: Lipomas are the most common benign soft tissue tumors in the general population. These lesions can appear on any part of the body and usually develop in the subcutaneous superficial tissue. Lipomas that show ossifying changes are very rare, representing less than 1% of the reported lipomas.

Disseminated histoplasmosis as a first clinical manifestation in a patient with small lymphocytic lymphoma: A case report.

The small lymphocytic lymphoma is a mature B cell neoplasm with a broad spectrum of clinical presentations. Opportunistic infections that are not related to the treatment, even in advanced stages, have a low incidence rate. There are few case reports in the medical literature of patients who have not received immunosuppressive therapy and present with small lymphocytic lymphoma associated with disseminated histoplasmosis at diagnosis.

[Histological and clinical characteristics of cases of immunoglobulin G4-related disease in a tertiary hospital, in Cali, Colombia].

Introduction: Immunoglobulin G4 (IgG4)-related disease has been described in the last decade. It is a fibro-inflammatory condition capable of affecting almost every organ and diagnosis requires both clinical and paraclinical confirmation. We present the largest study to date in Colombia.

Lymphomatoid granulomatosis of the brain: A case report.

Background: Lymphomatoid granulomatosis is a rare disorder of the central nervous system (CNS) with few cases being reported in literature. We present the case of an adult with an unusual lesion of the CNS who presented with motor seizures and was diagnosed with lymphomatoid granulomatosis, followed by a discussion of the process of evaluation and management.

Case Description: A 42-year-old male presented with motor seizures and loss of consciousness for 10 minutes along with dysarthria and left hemiplegia.

In situ mantle cell lymphoma: clinical implications of an incidental finding with indolent clinical behavior.

Background: Cyclin D1-positive B cells are occasionally found in the mantle zones of reactive lymphoid follicles, a condition that has been called "in situ mantle cell lymphoma". The clinical significance of this lesion remains uncertain.

Design And Methods: The clinical and pathological characteristics, including SOX11 expression, of 23 cases initially diagnosed as in situ mantle cell lymphoma were studied.