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Arch Dermatol. 2006;142:775-780.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Diagnosis: Cutaneous metaplastic synovial cyst.

MICROSCOPIC FINDINGS AND CLINICAL COURSE

Histopathologic analysis of the nodule revealed a cystlike cavity in the dermis, with multiple villous or papillary structures protruding into the cavity. Fibrin, mucin, and erythrocytes were also seen within the cavity. The papillary structures were covered by a synoviumlike lining. A tracklike defect was found at the bottom of the cyst (not shown), probably corresponding to the site where the wire was pulled away from the cyst. Away from the main lesion, there was a localized area of degenerated collagen as well as partial necrosis of the blood vessels.

Because the cyst was not located near any peripheral joints, the findings were most consistent with a cutaneous metaplastic synovial cyst. After excision of the lesion, a pelvic plain radiograph showed 13 remaining wire sutures beneath the surgical scar, but there were no other palpable nodules along the scar.

DISCUSSION

Synovial metaplasia was first described by Goldring et al¹ in the . . . [Full Text of this Article]

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Arch Dermatol. 2006;142(6):775-780.
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