Osteoid Osteoma (Subscribe)  

J Bone Joint Surg Br. 1984 Jan;66(1):16-20. The behaviour pattern of the scoliosis associated with osteoid osteoma or osteoblastoma of the spine.Ransford AO, Pozo JL, Hutton PA, Kirwan EO.
The behaviour pattern of the scoliosis associated with osteoid osteoma or osteoblastoma of the spine is described. In patients presenting with...

Osteoid Osteoma
Definition - Small (<1cm diameter of central nidus), solitary, benign, painful bone-forming tumours
Osteoblastoma
Definition - Solitary, benign bone forming tumour of> 2cm in size
Giant osteoid osteoma
Identical histologically but larger
Not surrounded by dense reactive bone

* M:F 2:1, 5 - 25 y/o (90%) (50% 10-20)
* pain at night - prostaglandin E2
* pain responds to salicylates
* tx: surgical excision of nidus, rare spontaneous regression
* location
o metadiaphysis and metapysis of long bones(73%)
...

Synonyms and related keywords: sclerotic bone island, benign bone neoplasm, benign skeletal neoplasm, bone lesion, bone neoplasm, skeletal lesion, skeletal neoplasm, cortical bone sclerosis, endosteal bone sclerosis, bone sclerosis, osteoblastic rimming, osteoblastoma, giant osteoid osteoma
Author: Ali Nawaz Khan, MBBS, LRCP, FRCS, FRCP, FRCR, Chairman of Medical Imaging, Professor of...

Radiology case 455-3122
Immature skeleton, fairly well-defined low density lesion within an area of reactive sclerosis. The lesion is in the diaphysis. The cortex of the bone is thickened medially. The fairly large central nidus of lucency is not typical, but the histology was diagnostic.

Radiology case 436-3122 Clinical presentation: 30 year old man with a history of pain in the left middle finger, relieved by aspirin.
There is sclerosis of the proximal phalanx of the left middle finger. This takes the form of a peripheral mid-diaphyseal fairly well-defined 4mm. lucency and adjacent related cortical thickening.
The isotope...

Radiology case 415-3122 Clinical presentation: Male 23 years old, with a history of increasing pain in the left shoulder, relieved by aspirin.
The view shows a dense sclerosis in the proximal metaphysis of the humerus with a central lucent nidus, which is below 1cm diameter. Medially there is visible thickening by periosteal...

Osteoid osteoma is a benign tumor usually less than 1.5 cm in size. Although it is small, it can produce significant pain and discomfort for prolonged periods. There is virtually no risk of malignant transformation. Its radiological features can mimic other conditions, and surgical treatment is not always successful.

Objectives
1. Describe symptoms and physical findings suggestive of osteoid osteoma
2. Describe the natural history of osteoid osteoma
3. Discuss useful imaging studies for the diagnosis of osteoid osteoma
4. Discuss management of osteoid osteoma of the extremities and of the spine

Section of Orthopedics Hyperguide

Discussion: - benign osseous tumor usually less than 1.5 cm in diameter, comprising 11% of all benign bone tumors; - no cases of malignant transformation has been reported; - occurs primarily in adolescents and less...

Osteoid osteoma is a benign osteoblastic (bone forming) tumor. It consists of a highly vascularized osteoid core. The growing core induces a peripheral zone of sclerosis and periosteal reaction. Diagnostic Radiology/Musculoskeletal Imaging/Tumors Basic/Osteoid ostemoa From Wikibooks, the open-content textbooks collection

Osteoid osteoma presents in the 2nd and 3rd decades. It is slightly more common in males. 90% of cases present between 5 and 25 years. The clinical history is of pain, often at night, which is relieved by Aspirin. 50% of cases occur in the proximal femur, but any bone...

Case Report: an unusual tibial intramedullary osteoid osteoma in a two-year-old Iowa Orthopaedic Journal

osteoid osteoma