Two patients with multiple myeloma developed cutaneous myeloma tumors. Well-differentiated myeloma cells characterized the tumors of the first case; those of the second case were anaplastic, resembling reticulum cell sarcoma.
The rarity of such cutaneous tumors is noted in a review of the literature. In addition, a morphologically less differentiated group of myeloma patients is apparent. Whether their anaplastic tumors are myeloma or a new malignancy is discussed. Bone marrow films differentiation.
RIVER GL, SCHORR WF. Malignant Skin Tumors in Multiple Myeloma. Arch Dermatol. 1966;93(4):432–438. doi:10.1001/archderm.1966.01600220044015
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