Giant cell tumor of the tendon sheath
Presented to the GP with a painless mass around the flexor aspect of the proximal PIP joint of the right index finger
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Vascular, hyporeflective mass along the superficial surface of the flexor tendon
This case demonstrates the ultrasound appearance of a giant cell tumor of tendon sheath.
50% of cases are diagnosed in patients younger than 40 years of age, with a peak incidence between 40-50 years of age. There is a slight female predilection.
They are associated with degenerative joint disease, especially in the distal interphalangeal (DIP) joint.