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. 2017 Apr-Jun;27(2):187–199. doi: 10.4103/ijri.IJRI_367_16

Figure 2.

Figure 2

Pelvis radiograph in achondroplasia shows square shape of the iliac bone, horizontal acetabular roof (squiggly arrow), and rhizomelic shortening of the femur. Also note the trident sign in achondroplasia. The three-pronged pear shape of the sciatic notch is well visualized in this radiograph (straight arrow)