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  • Title: The Herring lateral pillar classification for prognosis in Perthes disease. Late results in 49 patients treated conservatively.
    Author: Farsetti P, Tudisco C, Caterini R, Potenza V, Ippolito E.
    Journal: J Bone Joint Surg Br; 1995 Sep; 77(5):739-42. PubMed ID: 7559701.
    Abstract:
    We reviewed the radiographs of 49 patients with Perthes' disease at the stage of fragmentation and also after the end of skeletal growth to assess the value of the lateral pillar classification of Herring. The average age of the patients at diagnosis was 7 years 6 months and the mean follow-up was 24 years. Ten of the 11 Herring group-A hips showed good reconstruction of the femoral head. There were good results in group-B hips when the patients were less than nine years of age at diagnosis. All 11 group-C patients showed hip deformity at follow-up. The Herring classification provides a valid long-term prognosis in Perthes' disease, although age at diagnosis is also an important prognostic factor. The classification is relatively easy to apply, is reliable, and requires only an anteroposterior radiograph taken during the fragmentation stage of the disease.
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