Diagnostic Images: Osteoid osteoma

Sathya Narayanan R

Consultant Interventional Radiologist, Kauvery Hospital, Chennai

Background

A young 17-year-old male with left hip pain, which gets aggravated during the night and is relieved with aspirin.

CT left hip shows a sclerotic lesion in the subcortical location of the neck of the left femur – it is diagnostic of osteoid osteoma.

The patient underwent microwave ablation under spinal anesthesia.

The procedure time was 40 min from induction to ablation completion.

1-month follow-up: the patient is completely relieved of pain. He has started to resume his normal activities.

Fig (A): CT left hip shows a sclerotic lesion in the neck of the left femur

Fig (B): The microwave antenna is within the lesion

Fig (C): The post-procedure CT shows a lucent tract within the center of the nidus indicating perfect positioning of the antenna.

Fig (D): Intra-procedure image showing ablation of the lesion

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