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December 1978

Cutaneous Plasmacytomas in MyelomaRelationship to Tumor Cell Burden

Author Affiliations

From the Cancer Research Institute, University of California Hospitals, San Francisco (Dr Alberts), and the Sections of Hematology and Oncology (Dr Alberts) and Dermatology (Dr Lynch), Department of Medicine, University of Arizona College of Medicine, Tucson.

Arch Dermatol. 1978;114(12):1784-1787. doi:10.1001/archderm.1978.01640240026007

• Solitary cutaneous plasmacytomas may occur as benign tumors that are confined to the skin, whereas multiple lesions are generally associated with systemic plasma cell disease. Cutaneous plasmacytomas developed in two patients with documented multiple myeloma; this development occurred late in the course of their disease at a time when their systemic plasma cell tumor burden was large—approximately 3 kg in mass, which represented 2 to 3 × 1012 cells. The occurrence of cutaneous plasmacytomas in patients with multiple myeloma is generally late in the course of the disease and should be considered as a bad prognostic sign.

(Arch Dermatol 114:1784-1787, 1978)