Welcome to Classifications and Online Calculators in Radiology

This site was build along with the Atlas of Radiology Images to support your knowledge in radiology.

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that are used in radiology and related fields with free access.

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The concept of this website is based on a previous site that was founded in 2008 and is still up and running. The website is composed as a book, where all sources are properly referenced, according to a good practice in scientific publications.

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    Aseptic necrosis of femoral head - m. Perthes, lateral pillar classification by Herring

    Herring classification was published in 1992 and it was based on observation of 86 patients treated by bracing.

    Group Description
    Group A the height of the lateral pillar is maintained and no density changes can be identified
    Group B the lateral pillar is reduced between 50 nad 100% of original height
    Group C the lateral pillar is <50% of the original height

    References:

    1. Salter RB, Thompson GH. Legg-Calvé-Perthes disease: the prognostic significance of the subchondral fracture and a two-group classification of the femoral head involvement. Journal of bone and joint surgery American volume. 66(4):479–89.
    2. Herring JA, Neustadt JB, Williams JJ, Early JS, Browne RH. The lateral pillar classification of Legg-Calvé-Perthes disease. J Pediatr Orthop. 1992 Apr;12(2):143–50    .

    Updated 15/11/2013 12:00 by Lambert
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