Os subepicondylare mediale ossicle as a cause for cubital tunnel syndrome: A case report

Figure 2 Computed tomography and magnetic resonance imaging. A: Computed tomography scan (sagittal view) of the left elbow joint (orange arrow = ossicle, blue arrow = medial humeral epicondyle, yellow arrow = ulna); B: Magnetic resonance imaging of the left elbow joint. The orange arrow indicates the small corticated ossicle separated from the medial epicondyle with a thin, low-intense signal cleft. It lies within or adjacent to the ulnar collateral ligament; the fibers remain continuous. The fragment demonstrates marrow signal identical to native bone with thickened ulnar nerve (T1 hyperintense, T2 intermediate), suggestive of synchondrosis (accessory ossicle).