Isolated malakoplakia of inguinal lymph node: a rare case report.

Malakoplakia is rare chronic inflammatory disorder which commonly affects urinary tract. Though it has been reported in several sites outside the urinary tract, isolated lympnode involvement is extremely uncommon. Herein we present a case of 20 year old male with right inguinal lymphnodal mass. Histological findings including special stains and immunohistochemistry findings were characteristic of malakoplakia. This case is being presented to create awareness for inclusion of this entity in the differential diagnosis of lymphadenopathy.

Pulmonary zygomycosis: A clinicopathological study.

BACKGROUND AND OBJECTIVE: Zygomycosis is an emerging infection worldwide. Pulmonary zygomycosis (PZ) is uncommon with only few reported series from India. MATERIALS AND METHODS: All cases of PZ diagnosed on histopathology between 1995 and 2008 were included. Clinical and imageological findings were noted in all cases. Routine hematoxylin and eosin-stained sections were studied to assess the pathology; Gomori's methenamine silver (GMS), periodic acid Schiff were done for delineating fungal morphology. Culture reports were collected wherever available. Treatment and outcome details were noted. RESULTS: Seven patients were diagnosed with PZ during the study period, which included six males and one female patient. Six of these had diabetes mellitus (DM) and one patient was on chemotherapy for the treatment of Hodgkin's lymphoma. Fever and cough were the most common presenting features. Consolidation with or without cavitation was seen in six patients and lung abscess with fungal ball in one patient. All six patients with DM had upper lobe involvement and four had multiple lesions. Histological sections revealed necrotizing inflammation, hemorrhagic infarcts and angioinvasion. Culture was available in two patients, which grew Rhizopus oryzae. Five patients succumbed to disease and remaining two were lost to follow-up. CONCLUSION: Diabetes mellitus is the most common predisposing factor for PZ and carries high mortality.

Epstein-Barr virus as a possible etiologic agent in primary central nervous system lymphoma in immunocompetent individuals.

BACKGROUND: Primary central nervous system lymphoma (PCNSL) occurs in both immunocompetent and immunosuppressed individuals. The role of Epstein-Barr virus (EBV) has been implicated in immunosuppressed individuals but its role is not established in immunocompetent individuals. AIMS: To study the possible role of EBV in PCNSL in immunocompetent individuals. SETTING AND DESIGN: Retrospective study. MATERIALS AND METHODS: Thirty patients with PCNSL were studied immunohistochemically with antibodies to CD45, CD20, CD3 and EBV latent membrane protein-1 (EBV LMP-1). In situ hybridization was done in 19 patients where enough tissue was available using a specific oligonucleotide probe for EBV-Early RNA (EBER). RESULTS: All the patients were immunocompetent and mean age was 41.6 years. Histologically they were diffuse large cell lymphoma: 25 (83.3%) were B cell, 1(3.3%) was T cell and 4 (13.3%) were unclassified. EBV LMP-1 showed variable membrane and cytoplasmic positivity in 24 (80%) patients. In situ hybridization for EBER was negative in all the 19 patients studied. CONCLUSION: In this region of the world probably EBV has no etiologic role in PCNSL in immunocompetent individuals.

Multicentric extramedullary myeloid tumor.

Granulocytic sarcomas or extramedullary myeloid tumors represent the soft tissue counterpart of acute myeloid leukemia. The term is used for any solid collection of leukemic cells. There have been reports of these tumors occurring before the involvement of blood or bone marrow. Our patient had simultaneous involvement of three sites, which was diagnosed on cytology. Further confirmation was done on peripheral blood and bone marrow evaluation.