The upper femoral notch.
A notch-like defect in the cortex of the medial side of the femoral neck is described in asymptomatic children. Its appearance is similar to the metaphyseal cortical defects seen in other locations as normal variants.
D002648:Child; D002675:Child, Preschool; D005260:Female; D005272:Femur Neck / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D011859:Radiography