July 2013

Symptoms

47 year-old female with palpable ankle mass.

Diagnosis

Pathologically proven giant cell tumor giant cell tumor of the tendon sheath, abutting the posterior aspect of the flexor digitorum longus tendon, Seen on sagittal T1 (black arrow), fat-suppressed T2 (white arrow), and axial fat-suppressed T2-weighted images (white arrowhead).