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. Author manuscript; available in PMC: 2021 Apr 7.
Published in final edited form as: Am J Sports Med. 2020 Nov 23;49(1):35–41. doi: 10.1177/0363546520970914

TABLE 1.

Femoroacetabular Impingement–Type Imaging Findings

Type Radiographic Findings
Pincer Crossover sign2,5,16,27
and/or
Coxa profunda or protrusio acetabuli1,5,16,27,28
and/or
Lateral center-edge angle16,27,28 ≥40°
and/or
Tönnis angle5 <0°
Cam Typical pistol grip deformity
and/or
Alpha angle1,2 >55°
Mixed Cam- and pincer-type features