Acetabular dysplasia - adolescent

Case contributed by Henry Knipe
Diagnosis certain

Presentation

Right anterior thigh pain.

Patient Data

Age: 13 years
Gender: Female

Acetabular dysplasia with a shallow acetabulum with lateral deficiency and a subchondral geode. Femoral head undercoverage.

Undercoverage of right femoral head with a shallow dysplastic acetabulum with subchondral geode. Posterosuperior labral delamination with intralabral/paralabral cysts. Focal chondral attenuation at the chondrolabral junction anterosuperiorly. Likely excessive femoral anteversion.

12 months post-op

x-ray

Status post periacetabular osteotomy and femoral derotational osteotomy. No complication seen. Good acetabular coverage of the right femoral head.

Case Discussion

Acetabular dysplasia is common and cannot be diagnosed in infancy. At least for this patient, dysplasia was diagnosed before significant hip degeneration had occurred.

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