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HIP
DEFINITION:
Angle formed between slope of cup and line drawn through base of ischial tuberosities (RID2550 ) -- or teardrop
ABNORMAL:
if < 30 degrees then reduced abduction
if > 50 degrees then increased dislocation
RADLEX:
hip ( RID2639 ), hip joint ( RID2640 ), ischium ( RID2545 )