Hammertoe is a deformity of the second, third, or fourth toe in which the tip of the toe is bent downward at the middle joint (known as the proximal interphalangeal, or PIP, joint), and the middle of the toe is cocked upward, resembling a hammer. It is strongly associated with hyperextension of the metatarsophalangeal (MTP) joint (where the base of the toe attaches to the rest of the foot), as well as having a longer second toe than the first. Hammertoe deformity can be either flexible or fixed. Initially, the toe maintains ...

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