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Journal of Korean Medical Science ; : 833-839, 2002.
Artículo en Inglés | WPRIM | ID: wpr-125135

RESUMEN

Hematopoietic neoplasm coexpressing CD4 and CD56 includes a subset of acute myeloid leukemia with myelomonocytic differentiation, plasmacytoid monocyte tumor, and other immature hematopoietic neoplasms of undefined origin. Herein, we report a CD4+CD56+CD68+ hematopoietic tumor that was thought to be a tumor of plasmacytoid monocytes. This case is unique in the absence of accompanying myelomonocytic leukemia and the faint expression of cCD3 on the tumor cells. The patient was a 22-yr old man presented with multiple lymphadenopathy and an involvement of the bone marrow. Tumor cells were large and monomorphic with an angulated eosinophilic cytoplasm of moderate amount. Nuclei of most tumor cells were eccentric and round with one or two prominent nucleoli. Rough endoplasmic reticulum was prominent in electron microscopic examination. Tumor cells expressed CD4, CD7, CD10, CD45RB, CD56, CD68, and HLA-DR and were negative for CD1a, CD2, sCD3, CD5, CD13, CD14, CD20, CD33, CD34, CD43, CD45RA, TIA-1, S-100, and TdT. cCD3 was not detected in the immunostaining using paraffin tissue, but was faintly expressed in flow cytometry and immunostaining using a touch imprint slide. T-cell receptor gene rearrangement analysis and EBV in situ hybridization showed negative results. Cytochemically, myeloperoxidase, Sudan black B, and alpha naphthyl butyrate esterase were all negative.


Asunto(s)
Adulto , Humanos , Masculino , Antígenos CD/biosíntesis , Complejo CD3/biosíntesis , Antígenos CD4/biosíntesis , Antígenos Comunes de Leucocito/biosíntesis , Antígeno CD56/biosíntesis , Antígenos de Diferenciación Mielomonocítica/biosíntesis , Células de la Médula Ósea/patología , Núcleo Celular/patología , Eosinófilos/metabolismo , Citometría de Flujo , Reordenamiento Génico , Inmunohistoquímica , Hibridación in Situ , Leucemia Linfocítica Crónica de Células B/diagnóstico , Ganglios Linfáticos/patología , Microscopía Electrónica , Monocitos/metabolismo , Receptores de Antígenos de Linfocitos T/metabolismo
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