Osteoid Osteoma

Courtesy: Dr Amr Abdelgawad,
Texas Tech University, El Paso, USA

This video describes about the benign bone tumor osteoid osteoma.

• It is characterized by presence of a nidus (bone forming area) surrounded by reactive area of thickened bone . It is more common in 2nd & 3rd decades, usually affecting men.
• Common site is the diaphysis of long bones. when it affects spine, it can result in scoliosis
• Patient usually presents with pain which is more during night ,relieved by aspirin & other NSAID’s & not relieved by rest.
• X-ray shows a radiolucent area surrounded by reactive dense sclerotic bone
• CT scan is better than MRI in diagnosing osteoid osteoma as the nidus can’t be seen accurately due to soft tissue oedema.
• CT shows radiolucent area surrounded by dense hypersclerotic bone. Here the nidus is less than 1.5 cm. If it is more than 1.5 cm it will fall into the category of osteoblastoma
• Osteoid osteoma can be seen as region of hotspot in bone scan.
• Medical treatment is by the use of NSAIDs
• Surgical treatment includes excision of the lesion with nidus & CT guided percutaneous radio frequency ablation