Giant Cell Tumor of the Tendon Sheaths of the Fingers

The case was a male patient, 65 years old, with no relevant medical history, who was consulted due to painless swelling on the dorsal side of the fifth finger of the left hand which had lasted for 4 years, with no history of trauma. Physical examination confirmed the tumor, elastic on palpation, with preserved finger mobility (Fig. 1) Simple X-rays showed a soft tissue tumor (Fig. 2); the ultrasound demonstrated the same lesion and the MRI showed a lesion measuring 16 × 10 × 12 mm in diameter craneo-caudally, anteroposterior and transversely, unhomogeneous, with a hypointense signal and loculations on T1, predominantly hyperintense on T2 and showing moderate contrast enhancement (Fig. 3).