title: CD2+, CD3-, CD56/NCAM+ malignant lymphoma with TCR beta gene rearrangement: a case report.
abstract: A case of CD56/NCAM+ malignant lymphoma is reported. Only a rare malignant lymphoma cell showed azurophilic granules in the cytoplasm of Giesma-stained preparations, while electron microscopic examination revealed occasional cytoplasmic granules with paracrystalline inclusions. The most common phenotype seen in NK lymphomas, CD2+, CD3-, CD56+, CD16-, CD57-, was present in the case. Cases with this phenotype have been interpreted to represent either true NK lymphoma or T-cell lymphoma with NK expression. Genotyping, where performed, has shown TCR germline configuration. Our case showed TCR beta rearrangement indicating that the above phenotype can be associated with a peripheral T-cell lymphoma.
mesh_terms: D000368:Aged; D018801:CD2 Antigens / Q000032:analysis; D017252:CD3 Complex / Q000032:analysis; D019002:CD56 Antigen / Q000032:analysis; D015333:Gene Rearrangement, beta-Chain T-Cell Antigen Receptor; D006801:Humans; D016130:Immunophenotyping; D008223:Lymphoma / Q000175:diagnosis* / Q000473:pathology / Q000628:therapy; D008297:Male; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics
chemical_list: D018801:CD2 Antigens; D017252:CD3 Complex; D019002:CD56 Antigen; D016693:Receptors, Antigen, T-Cell, alpha-beta