Sagging rope sign of Perthes disease

Case contributed by Dr Simon Vanden Berghe

Presentation

26-year-old male of Middle Eastern origin. Chronic pain in both hips, no history of hip surgery or hip trauma.

Patient Data

Age: 26 years
Gender: Male
Modality: X-ray

Bilateral deformity of the femoral heads. Geodes in both the acetabulum and femoral head on both sides.

Thin sclerotic line that crosses the femoral neck is called the 'sagging rope sign'. It is better seen on the right side.

Modality: X-ray

Irregular femoral head and geode formation. Sagging rope sign on both sides, best visible on the right side.

Case Discussion

The sagging rope sign is visible on a plain radiograph of the hip or pelvis. It describes the thin sclerotic line that crosses the femoral neck and resembles a hanging or sagging rope that is suspended on both ends. This sign indicates a late stage of Perthes disease. 

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Case Information

rID: 52165
Case created: 24th Mar 2017
Last edited: 26th Mar 2017
Inclusion in quiz mode: Included

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