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Joseph T. Wilson, MD; Leon Sokoloff, MD

JAMA. 1970;214(3):593-595.

Abstract
In four patients with rheumatic disease, a subcutaneous lesion in the olecranon region, which appeared to be a rheumatoid nodule clinically, proved to be an epidermoid cyst histologically. No pathogenetic relationships between the epidermoid cyst and the rheumatic disease were suggested. The biopsy findings must be interpreted with care, because, as illustrated in a fifth case, a degenerated rheumatoid nodule can be confused histologically with a ruptured epidermoid cyst.

Author Affiliations
From the Pathologic Anatomy Branch, National Cancer Institute (Dr. Wilson), and the Laboratory of Expermental Pathology, National Institute of Arthritis and Metabolic Diseases, Bethesda, Md (Dr. Sokoloff).

Footnotes
Reprint requests to LEP/NIAMD, Bldg 10, Rm 3N-114, National Institutes of Health, Bethesda, Md 20014 (Dr. Sokoloff).

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