Citation, DOI, disclosures and article data
Citation:
Feger J, Knipe H, Bell D, Acetabular sourcil. Reference article, Radiopaedia.org (Accessed on 28 Feb 2025) https://doi.org/10.53347/rID-81130
Disclosures:
At the time the article was last revised Henry Knipe had the following disclosures:
- Radiopaedia Events Pty Ltd, Speaker fees (past)
- Integral Diagnostics, Shareholder (ongoing)
- Micro-X Ltd, Shareholder (ongoing)
These were assessed during peer review and were determined to
not be relevant to the changes that were made.
View Henry Knipe's current disclosures
The acetabular sourcil is a radiographic feature seen on plain radiographs of the hip and pelvis as well as coronal CT reformats and MR images.
Gross anatomy
The acetabular sourcil refers to the roof or the weight-bearing area of the acetabulum and is characterized by increased sclerosis. It normally has a concave shape and is congruent with the femoral head 5.
Clinical importance
An upsloping lateral or flattened/incongruous sourcil indicates acetabular dysplasia and hip instability 1,4, a downsloping sourcil leads to pincer morphology 5.
Its medial and lateral edges are important landmarks for several signs and measurements in the evaluation of hip morphology 1,2:
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1. Clohisy J, Carlisle J, Beaulé P et al. A Systematic Approach to the Plain Radiographic Evaluation of the Young Adult Hip. J Bone Joint Surg Am. 2008;90 Suppl 4(Supplement_4):47-66. doi:10.2106/JBJS.H.00756 - Pubmed
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2. Popat R, Lee S, George D, Amiras D, Sarraf K. Assessment of the Young Adult Hip Joint Using Plain Radiographs. Musculoskelet Surg. 2020;104(3):245-55. doi:10.1007/s12306-020-00650-2 - Pubmed
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3. Ogata S, Moriya H, Tsuchiya K, Akita T, Kamegaya M, Someya M. Acetabular Cover in Congenital Dislocation of the Hip. J Bone Joint Surg Br. 1990;72(2):190-6. doi:10.1302/0301-620X.72B2.2312554 - Pubmed
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4. Wong T, Jesse M, Jensen A, Kraeutler M, Coleman C, Mei-Dan O. Upsloping Lateral Sourcil: A Radiographic Finding of Hip Instability. J Hip Preserv Surg. 2018;5(4):435-42. doi:10.1093/jhps/hny042 - Pubmed
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5. Welton K, Jesse M, Kraeutler M, Garabekyan T, Mei-Dan O. The Anteroposterior Pelvic Radiograph. J Bone Joint Surg. 2018;100(1):76-85. doi:10.2106/jbjs.17.00500 - Pubmed
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