Anatomical variations to the human skeletal system are common and frequently reported in the literature. The structures around the hand and wrist are no exception, and these variations can affect ligaments, tendons, muscles, nerves, arteries, joints, and bone morphology. Musculoskeletal health care providers must be familiar with normal, individual variations when encountered during patient care and diagnostic imaging. In some instances, morphological variations have resulted in differences in kinematics, while others have been found in association with certain medical conditions. We discuss an unusual variation of the capitate-trapezoid joint. To the best of our knowledge, no prior studies have previously reported on this topic.

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