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Missed acute isolated peroneal compartment syndrome.

This paper outlines 3 cases of acute isolated peroneal (lateral) compartment syndrome following exertion, minor trauma or overuse. Compartment syndromes are usually associated with crush injuries or fractures; they are an uncommon development following minor trauma or overuse. In acute isolated peroneal compartment syndrome the diagnosis is often delayed, resulting in permanent impairment. Persistent or worsening pain following a minor injury or overuse is typical, and the initial physical findings are often nonspecific, although swelling and tenderness out of proportion to the described injury are common. Marked increase in pain with passive inversion and dorsiflexion of the ankle should suggest the diagnosis. In cases that present late or where the diagnosis is initially missed, there is often a common peroneal nerve palsy. As with all compartment syndromes, prompt diagnosis and surgical decompression is necessary to prevent permanent impairment.