A rare case of an intratendinous ganglion cyst extending into the muscle belly of flexor carpi radialis: a case report and review of the literature.

ITGCs (intratendinous ganglion cysts) involving the flexor compartment of the wrist are uncommon, and reports are scarce in the literature. The differential diagnosis is wide and can mimic sinister lesions. We report a case of a 62-year-old male, that presented to our tertiary orthopaedic oncology service with an intratendinous ganglion cyst, extending into the muscle belly of flexor carpi radialis. We describe this rare presentation and review the literature.