Kohler disease (or "Köhler") is rare bone disorder of foot found in children of age between 6 and 9. It was first described in 1908 by Alban Kohler (1874-1947), a German physician. It is causes when navicular bone temporarily loses its blood supply. As a result tissue in the bone dies and bone collapses. more...
Pain and swelling in the middle part of the foot, due to which patient usually limps. Typically disease effects boys, but it can affect girls. Mostly boys of around 5 years of age are affected and patient complains of pain in foot over apex. X-ray of both feet is used to diagnose disease. The affected foot has dense flattened navicular bone.
There are theories, but no definitive cause is found yet. It may be due to strain on a weak navicular bone.
Use below knee cast. Encourage patient to exercise moderately. It causes no long term problem. As navicular bone gets back to normal, symptoms improves.
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