This is a case report of extramedullary plasma cell tumors occurring in the nasopharynx, the duodenum and in multiple sites on the skin of a man aged 56. Mattick and Thibaudeau1 deemed all such interesting and rare tumors worthy of reporting, and the multiplicity of the extramedullary sites supplements particularly the interest in this case.
The first case of an extramedullary neoplastic growth simulating that seen in bone lesions of multiple myeloma was described by Schridde in 1905. Since that time there have been about 150 cases described in the literature under the terminology of extramedullary plasma cell tumor, extramedullary plasmoma, plasmocytoma and plasma cell sarcoma. The most comprehensive review of the literature is that by Hellwig2 (1943), covering 127 cases of others and 1 of his own; in 65, the tumor originated in the upper respiratory tract; in 50, in the conjunctiva—their benignity suggesting inflammation rather than neoplasm; in
FUERSTE F, ZUCKERMAN SS. EXTRAMEDULLARY PLASMA CELL TUMOR. Arch Otolaryngol. 1950;51(4):608–615. doi:10.1001/archotol.1950.00700020631011
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