Presentation
History of pain in the left thigh
Patient Data
Age: 10 years
Gender: Male
From the case:
Osteoid osteoma
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Subtle sclerotic focus in the left femur neck.
From the case:
Osteoid osteoma
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Small focus in the left femoral neck just above the greater trochanter showing low T1 and high T2/STIR signal intensities with surrounding marrow edema.
Post-contrast enhancement of the nidus with a hypointense rim in all sequences.
Left side moderate hip joint effusion with synovial thickening.
Case Discussion
Features are of osteoid osteoma with possible inflammatory synovitis. CT scan is the modality of choice for osteoid osteoma. MRI can masquerade a malignant lesion.
Additional contributors: Dr. Mohammad Tahir Aien and Dr. Fazel Rahman Faizi
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