Supra-acetabular fossa

Case contributed by Dr Andrew Dixon


Hip pain.

Patient Data

Age: 16 years
Gender: Female
Modality: MRI

Focal 3mm deep 8mm wide fossa within the superior aspect of the acetabulum with cartilage continuing to line the fossa consistent with a supra-acetabular fossa (a normal variant). No evidence of any adjacent marrow reaction which you would certainly expect if this region represented an acquired osteochondral defect

Modality: Annotated image

Coronal and sagittal PD weighted images of a supra-acetabular fossa. Note how the fossa remains lined with intermediate signal cartilage. 

Case Discussion

Characteristic MRI appearance of a supra-acetabular fossa which is a normal variant. There is a small hip joint effusion which may indicate synovitis as a cause for the patient's symptoms. 

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Case Information

rID: 24359
Case created: 9th Aug 2013
Last edited: 16th Feb 2016
Inclusion in quiz mode: Included

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