Brian P. Jacob, David C. Chen, Bruce Ramshaw, Shirin Towfigh (eds.) - The SAGES Manual of Groin Pain-Springer International Publishing (2016)

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J.C. Campbell and G.D. Paiement
Fig. 8.8. Anteroposterior (AP) radiograph of the left hip showing the typical
cam deformity of the proximal femur with os acetabulum (an accessory bone
unrelated to the pathology).
joint. As such, the labrum has received new attention regarding its
potential role in preserving the hip cartilage. Patients with tears of the
labrum often present with deep-seated hip or groin pain or report a
popping or clicking sensation with motion.
Physical Exam Painful range of motion is present, most pronounced
with flexion or extension of the hip in abduction, combined with a
rotational movement. Rolling the hip through this range of motion often
produces pain and a popping sensation for a patient with labral pathology.
Diagnostic Exams X-rays may occasionally show a small calcification
at the acetabular rim, indicating a calcified labrum from recurrent trauma
and degeneration. However, most labral pathologies are not diagnosed
with plain radiographs. Magnetic resonance (MR) arthrogram is the
imaging study of choice for diagnosis and when a hip joint preservation
procedure is a consideration (Fig. 8.9 ).