Köhler disease
（重定向自Koehler disease）
Köhler disease (also spelled "Kohler" and referred to in some texts as Kohler Disease II) is a rare bone disorder of the foot found in children between six and nine years of age. The disease typically affects boys, but it can also affect girls. It was first described in 1908 by Alban Köhler (1874–1947), a German radiologist.