Giant cell tumor of soft tissue presenting as a lobulated, polypoid skin tumor

The authors declare no conflict of interest. Data sharing is not applicable to this article as no new data were created or analyzed in this study. F IGURE 1 Clinical image depicting an encapsulated fire-red growth with a pale fibrous septum dividing it into the three lobules F IGURE 2 Representative low-power images of the lesion. Underlying granulation tissue resulting from prior biopsy and overlying ulceration, there is focal osteoid formation (A; H&E, ×20). Deeper within the tumor are large nodules rich in osteoclast-like giant cells which extend to the resection margin (B; H&E, ×20)