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Giant cell tumor of the tendon sheath

Case contributed by Sajoscha A. Sorrentino
Diagnosis certain

Presentation

Growing mass on the radial side of the right index finger. No pain.

Patient Data

Age: 40 years
Gender: Male

Mass on the radial side of the right index finger.

ultrasound

Tumor with 14 x 6 x 11 mm in diameter. Internal vascularity is seen.

Well defined tumor with high signal in PD and TIRM, low signal in T1w. Marked enhancement in T1 C+.

Case Discussion

Local surgical excision was performed. Histology showed the typical composition of fibroblasts and multinucleated giant cells, foamy histiocytes and inflammatory cells on a background fibrous matrix, confirming the diagnosis of giant cell tumor of the tendon sheath.

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