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Slipped Capital Femoral Epiphysis: Developmental Coxa Vara

  • Frederic Shapiro
Chapter

Abstract

Coxa vara is not a disease; it is a descriptive term referring to the deformed position of the head and neck of the femur in relation to the long axis of the shaft. In a strict structural sense, coxa vara today refers to deformity of the proximal femur in which the head-neck axis on an anteroposterior radiograph forms an angle with the long axis of the femoral shaft which is 110° or less (Fig. 3.1). In a more dynamic and all-inclusive sense, coxa vara can be said to exist when any developing deformity of the proximal femur repositions the femoral head-neck relationship into a more varus conformation than previously existed and that is occurring in a relatively rapid and pathologic fashion not compatible with the normal developmental diminution of the head-neck-shaft angle. In the childhood years, the normal head-neck-shaft angle passes from a value as high as 145° to the normal adult range of 120–130°. When defined this way, the term coxa vara includes the broad range of developmental and acquired disorders that predispose to that shape of the proximal femur.

Keywords

Coxa vara overview Slipped capital femoral epiphysis, Clinical profile, Pathoanatomy, Imaging, Avascualar necrosis, Chondrolysis, Surgical management Proximal femoral focal deficiency Infantile coxa vara 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Frederic Shapiro
    • 1
    • 2
  1. 1.Visiting Scholar, Stanford University School of Medicine, Department of Medicine/Endocrinology (Bone Biology)Palo AltoUSA
  2. 2.Formerly, Associate Professor of Orthopaedic Surgery, Harvard Medical SchoolBoston Children’s HospitalBostonUSA

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