Deformities of the toes are not uncommon and can occur from
muscle imbalance, or other causes such as rheumatoid arthritis, diabetes,
compartment syndrome, synovitis, or neurological disorders. Hammer toe occurs
as flexion of the proximal interphalangeal (PIP) joint. Hammer toe is similar
to the Boutonniere deformity of the finger. Claw Toe is a hyperextension deformity
of the MTP joint and flexion of the PIP and DIP, resembling a pirate hook. Claw
toe is similar to an intrinsic minus deformity of the hand, or “claw hand”.
Mallet toe is similar in appearance to mallet finger, and is a flexion
deformity of the DIP joint.
