Osteoid osteoma

Case contributed by Aditya Shetty
Diagnosis probable


Pain in the arm associated with swelling.

Patient Data

Age: 25 years
Gender: Male

X-ray shows a sclerotic cortical thickening of the mid shaft of the ulna with a lucent area within representing a nidus. Soft tissue swelling is noted at the site of thickening.

Rest of the bones appear normal.

Annotated image

Red arrow: cortical thickening

Yellow arrow: nidus

Case Discussion

Case of osteoid osteoma, which account for 10% of benign bone tumors with a higher incidence in young males.

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