Tumour in a tumour: a well-differentiated spindle cell sarcoma within a forearm lipoma.

Lipomas are common, benign, soft tissue masses in adults. Sarcomatous change within a giant lipoma is a very rare event. We present a case of a woman presenting with a forearm lipoma that subsequently developed a central, well-differentiated, spindle-cell sarcoma within the lipoma. This case underlines the importance of identifying red flags for referral of soft tissue tumours.
Competing Interests: Competing interests: None declared.
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