case_images: PMC7474778_01
case_images: MRI T2 fat-saturated coronal image demonstrating acetabular and periacetabular soft tissue edema (*) and a small joint effusion (arrow) in the left hip.
case_images: CRIRH2020-8810735.001.jpg
case_images: PMC7474778_01_CRIRH2020-8810735.001.jpg
case_images: fig1
case_images: Initial MR arthrogram of the left hip showed marked edema of the medial and posterior walls of the left acetabulum (Figure 1).
case_images: Bone scan demonstrating abnormal uptake in the left acetabulum, lateral to excreted isotope in the bladder (arrow).
case_images: CRIRH2020-8810735.002.jpg
case_images: PMC7474778_01_CRIRH2020-8810735.002.jpg
case_images: fig2
case_images: Bone scan was unremarkable apart from focal increased uptake in the left acetabulum (Figure 2).
case_images: MRI contrast-enhanced T1 fat-saturated axial image demonstrating enhancing bone edema (*) and medial synovial thickening with enhancement (arrow).
case_images: CRIRH2020-8810735.003.jpg
case_images: PMC7474778_01_CRIRH2020-8810735.003.jpg
case_images: fig3
case_images: Repeat contrast-enhanced MRI showed left hip effusion that decreased from before, with medial focal synovial enhancement and edema of the acetabulum (Figure 3).
case_images: CT scan demonstrating a low attenuation intra-articular lesion with adjacent sclerosis (arrow).
case_images: CRIRH2020-8810735.004.jpg
case_images: PMC7474778_01_CRIRH2020-8810735.004.jpg
case_images: fig4
case_images: It showed 11 x 6 mm low attenuation focus with subtle internal nidus in the posteromedial aspect of the acetabular rim suggestive of intra-articular OO (Figure 4).