The fingers are commonly referred to as the thumb, index finger ... OA often affects the joint connecting the thumb and wrist ...

DIP joints are the closest to the fingertips ... most often in the middle knuckle of the little, ring, middle, or index ...

A mallet finger is a flexion deformity of the DIP joint. It is caused by a disruption of the extensor mechanism near its insertion into the distal phalanx. A mallet deformity can lead to a swan ...