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What is it? Unusual interstitial fibrohistiocytic tumor or other.

Fibrohistiocytic lesions are capable of presenting in a variety of histologic guises. We have recently encountered two lesions that similarly showed a hitherto described proliferation of atypical spindled and stellate cells with a distinctive deep dermal and interstitial distribution. The pathogenic significance and nosologic status of this neoplasm is unknown.