Investigating the Challenges in Diagnosis and Management of Giant Cell Tumors in the Distal Phalanx: A Case Report.

Giant cell tumors (GCTs) of bone are locally aggressive neoplasms that typically occur in the distal femur or proximal tibia. Infrequently, they may develop in the bones of the hand, including the distal phalanx. This case highlights the importance of a thorough and systematic diagnostic workup of GCTs presenting in rare and challenging locations such as the distal phalanx. A 53-year-old male presented to the clinic with a several-month history of left middle fingertip enlargement, pain, and limited mobility. Plain film X-ray and magnetic resonance imaging revealed a lesion in the left middle distal phalanx. The patient underwent curettage with a working diagnosis of giant cell reparative granuloma with focal fracture callus. Eight months later the mass recurred and amputation of the distal phalanx tip was performed. The histopathological evaluation confirmed a diagnosis of a giant cell tumor of bone. The postoperative course was unremarkable. No further treatment was required. In rare and difficult-to-diagnose tumors clinicians should consult with experienced pathologists to improve diagnostic accuracy. This approach is essential for optimizing patient outcomes, preventing treatment delays, and reducing the risk of adverse events.