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Melanoma-associated antigens in tumours of the nervous system: an immunohistochemical study with the monoclonal antibody HMB-45

Virchows Archiv A Pathological Anatomy and Histopathology, ISSN: 0174-7398, Vol: 420, Issue: 2, Page: 121-126
1992
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Article Description

The aim of this study was to determine the specificity and sensitivity of the commercially available, monoclonal anti-melanoma antibody HMB-45 in brain tumours and peripheral nerve sheath tumours. Hence, a series of 155 different non-melanotic tumours of the central and peripheral nervous system were examined immunohistochemically. The brain lesions consisted of primary tumours and metastases from various carcinomas. Twenty melanotic tumours (cerebral metastases of malignant melanomas, meningeal melanomatosis, meningeal melanocytomas) and dermal blue cell naevi served as controls. All melanotic tumours stained positive. Furthermore, a positive immunohistochemical reaction was observed in the following non-melanotic tumours: gliosarcomas, primitive neuroectodermal tumours, ependymoma, malignant schwannomas and different intracranial hamartomas. Two plasmocytomas and 4 metastatic carcinomas also revealed positive staining for HMB-45. Our results confirm the necessity for cautious interpretation of HMB-45 immunoreactivity as a tool in the immunohistochemical characterization of nervous system tumours. © 1992 Springer-Verlag.

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