Adamantinoma of the Ulnar Shaft Reconstructed With a Vascularized Free Fibula

We describe a 36 -year -old man with a long-standing diagnosis of ulnar fi- brous dysplasia with associated fracture of the ulna. He presented with a growing and increasingly tender forearm mass and was diagnosed with adamantinoma of the ulna, for which he underwent wide resection of the ulnar diaphysis followed by reconstruction with a vascularized fibula au- tograft. This case serves to emphasize the importance of performing a stepwise workup for the diagnosis of osseous neoplasms even in cases with long-standing diagnoses. [Orthopedics. 2024;47(2):el02-el05.]