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American Journal of Pathology, Vol 134, 961-965, Copyright © 1989 by American Society for Investigative Pathology

REGULAR ARTICLES

Expression of the common acute lymphoblastic leukemia antigen (CD10) in mesenchymal tumors

G Mechtersheimer and P Moller
Institute of Pathology, Heidelberg University, Federal Republic of Germany.

The expression of the CD10 antigen, formerly designated as common acute lymphoblastic leukemia antigen and recently identified as neutral endopeptidase, was examined immunohistochemically in 26 benign and in 55 malignant mesenchymal tumors. CD10 expression was found in 4 of 4 leiomyomas, 7 of 10 leiomyosarcomas, 1 of 6 rhabdomyosarcomas, 2 of 2 Triton tumors, 1 of 2 aggressive fibromatoses, 1 of 3 fibrosarcomas, 1 of 4 synovial sarcomas, 1 of 1 giant cell tumors of tendon sheath, 4 of 4 malignant fibrous histiocytomas, 3 of 3 Ewing's sarcomas, and 2 of 3 osteosarcomas. Furthermore, CD10 was expressed consistently in the myoepithelial compartment of 12 fibroadenomas and, in 7 of these cases, in a minor stromal cell population, probably of (myo-) fibroblastic origin. Tumors of adipose tissue (4 lipomas, 5 liposarcomas), tumors of autonomic ganglia (2 ganglioneuromas, 1 ganglioneuroblastoma, 2 neuroblastomas), tumors of peripheral nerves with purely schwannian differentiation (7 malignant schwannomas), and tumors of disputed origin were consistently CD10-negative, however, as were single cases of fibroma and chondrosarcoma. These findings indicate that the expression of CD10 is a frequent but not obligatory feature in some mesenchymal tumors. Therefore CD10 is of value in the differential diagnosis of mesenchymal tumors.


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Copyright © 1989 by the American Society for Investigative Pathology.