Os lunatum bipartitum

Congenital

bipartite lunate presenting as a misdiagnosed lunate fracture: a case report. (A) Lateral and (B) posteroanterior radiographs of the patient"s left hand. The bipartite lunate is clearly visible on the lateral radiograph (A; arrow). The margins of both lunate portions are smooth and well corticated.

Congenital

bipartite lunate presenting as a misdiagnosed lunate fracture: a case report. Axial T1-weighted magnetic resonance imaging (MRI) scan of the left wrist demonstrating the linear hypointense signal (arrow) between the dorsal and palmar parts of the lunate.

Congenital

bipartite lunate presenting as a misdiagnosed lunate fracture: a case report. T1-weighted MRI scan of the wrist in the sagittal plane. The divided lunate (arrow) aligns well with the capitate and the radial articular surface.