ijortho-49-10-g001

The stages of evolution of Perthes’ disease. The early part of the disease is from the onset till Stage IIa (early fragmentation stage). The late part of the disease is from Stage IIb to Stage IIIb. Intervention aimed at preventing femoral head deformation is only feasible during the early part of the disease | Joseph, B. (2015). Management of Perthes’ disease. Indian Journal of Orthopaedics, 49(1), 10–16. https://doi.org/10.4103/0019-5413.143906

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