Dislocation of Interphalangeal Joint of Thumb – Anteroposterior Xray

In contrast to other digits, thumb has only two phalanges. These are joined by interphalangeal joint.

Phalangeal dislocations are not very common.

The dislocation at this joint usually occurs due to a force causing hyperextension of the  joint.

The following xray is of a 22 years old man who sustained this injury after he struck his thumb inadvertantly with a moving object.

The dislocation was noted in the interphalangeal joint and was reduced closed.

The reduction was stable ans thumb has been immobilized in the plaster for two weeks.

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