Giant cell tumor of tendon sheath

Case contributed by Dr Nafisa Shakir Batta

Presentation

Slowly growing swelling over the dorsum of foot.

Patient Data

Age: 25
Gender: Female
X-ray

Soft tissue swelling at dorsum of foot. No calcifications or bony erosion.

A variegated hyperintense heterogenous soft tissue SOL at dorsum of foot underneath and lifting the extensor digitorum longus tendons 2nd, 3rd, 4th slips. A tendon is seen to pass through the lesion which represents extensor digitorum brevis tendon slip.  Intraarticular extent is seen at cuboid-4th metatarsal articulation.

No intraosseous extension, no calcification.

Ultrasound

The doppler study demonstrates internal vascularity. Intraarticular extension is also well delineated.

Case Discussion

MRI reveals a heterogeneous soft tissue SOL closely associated with the extensor digitorum longus involving the brevis tendons, with dark intralesional signals on GRE : These findings represent Giant cell tumor of the tendon sheath (GCTTS), also known as Pigmented villonodular tumor of the tendon sheath (PVNTS).

Excision biopsy performed and diagnosis confirmed on histopathology.

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Case information

rID: 37766
Published: 25th Jun 2015
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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