Giant cell tumors of the tendon sheath: Sonographic and magnetic resonance findings

Giant cell tumors of the tendon sheath (GCTTS) are the second most common tumor affecting the hand. Lesions are often solitary, painless, slow growing, and sub-cutaneous masses. We present here a case of GCTTS involving the dorsal aspect of little finger with sonographic and magnetic resonance findings favoring the disease, which was further confirmed by biopsy. Most of the cases mentioned previously in literature however show these tumors to occur more commonly on the volar aspect whenever there is involvement of the hand.