Intraosseous ganglia of the dorsal lunate. Axial STIR-w images (A, C) and axial T1-w images (B, D) show intraosseous ganglia (arrows) in the dorsal lunate at the attachment of the dorsal extrinsic ligaments. Sagittal STIR-w images (E, F) of intraosseous ganglia in the dorsal lunate. Images (A, B, E) are of symptomatic wrists, and images (C, D, F) are of asymptomatic wrists. Dorsal extraosseous ganglia (arrowheads) originating at the same site are shown in C and E.