OSTEOID OSTEOMA IN LESSER TROCHANTER-IN SUBPERIOSTEAL LOCATION

Abstract

Osteoid  osteoma is a benign forming tumor accounts for around 5% of all

bone tumours and 11% of benign bone tumours with male prediliction². Osteoid

Osteoma is benign tumour of young males and females between 10 and 30 years

affecting long bones tibia, femur and  other sites such as spine, humerus.It is classified

based on location as cortical, cancellous or sub periosteal. Nocturnal pain is most

common symptom that usually responds to salicyclates and Non steroidal anti

inflammatory medications².x-ray shows small central radiolucent nidus of <1.5cm.  CT

is modality of choice not only for diagnosis but also for specifying location of lesion i.e

cortical or sub cortical or medullary. Newer surgical procedures include radiofrequency

ablation,CT guided percutaneous bone resection and drilling^3,5,6 and en bloc resection.