Hip Disorders
A 3-year-old boy presents with a painless limp and waddling gait that has been present since he started walking. Examination reveals bilateral positive Trendelenburg sign, limited hip abduction bilaterally, and apparent limb length discrepancy. Pelvic radiograph shows bilateral decreased neck-shaft angles of 100 degrees with triangular ossification defects in the inferomedial femoral neck. The Hilgenreiner epiphyseal angle measures 65 degrees on the right and 72 degrees on the left. Regarding coxa vara:
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Coxa vara is defined as a neck-shaft angle less than 120 degrees (normal is 135 degrees at birth, de...
The Hilgenreiner epiphyseal angle (HEA) is the key prognostic indicator in developmental coxa vara; ...
Developmental coxa vara typically presents in adolescence; the primary defect is in the superior fem...
Fairbank's triangle (inverted Y sign) is a triangular radiolucent ossification defect in the inferom...
Clinical features include Trendelenburg gait (due to abductor weakness from shortened lever arm), li...
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