CT guided laser ablation of osteoid osteoma

To present our experience of computed tomography (ct) guided laser ablation of radiologically proven osteoid osteoma in the inter trochantric region of the femur. a 19 year old female presented with severe pain in left upper thigh region since 6-7 months,which was exaggerated during nights and was relived on taking oral non steroid anti inflammatory drugs (nsaids). on ct scan hypodense lesion with surrounding dense sclerosis noted in intertrochanteric region in left femur. magnetic resonance imaging (mri) revealed small focal predominantly cortical,oval lytic lesion in the intertrochanteric region which appeared hypointense on t1 weighted image (t1wi) and hyperintense on t2 weighted image (t2wi) and short tau inversion recovery (stir) image. diffuse extensive sclerosis and hyperostosis of bone was noted surrounding the lesion appearing hypointense on t1w and t2w images. under local anesthesia the laser fibre was inserted in the nidus under ct guidance through bone biopsy needle and 1800 joules energy delivered in the lesion continuous mode. complete relief of pain noted after 24 hours after the treatment. ct guided laser ablation is a safe,simple and effective method of treatment for osteoid osteoma. © journal of krishna institute of medical sciences university.