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Published on: April 7, 2017
Synovial metaplasia in lipoma
1Soft Tissue Tumor Registry, Sikl's Department of Pathology, Faculty Hospital, Pilsen, Czech Republic.
Abstract:
We present a unique case of a lipoma with widespread synovial metaplasia. A 52-year-old woman had a recurrence 1 year after excision of a subcutaneous lipoma of the neck. Histologically, the primary tumor was an ordinary lipoma. The recurrent tumor was a myxoid lipoma with synovial metaplasia. The synovial metaplastic process manifested as labyrinthlike clefts, which were lined by one or more synovial-like cell layers. Ultrastructurally, the synovial metaplastic cell had secretory, phagocytic, and fibroblastlike features.
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