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The aseptic osteonecrosis of the femoral head in children, today called Legg-Calvé-Perthes disease , was described almost simultaneously by three different authors in 1910. None of the authors, however, had an exact understanding regarding the underlying etiology of the disease. Legg described trauma as a possible activator, Calvé thought it was due to an altered osteogenesis, and Perthes suggested that an inflammatory process could change the shape of the femoral head’s epiphysis. It wasn’t until 1963 that the name “Legg-Calvé-Perthes disease” was established through the official medical subject headings of the national Library of Medicine. Prior to this, the condition had many names, such as arthritis deformans juvenilis, coxa plana, and osteochondritis deformans juvenilis.