Mercer, "Osteoid osteoma
in children and young adults," Pediatrics, vol.
usually presents with nonspecific pain sensation, which increases during the night and responds well to NSAIDs (6,11).
Some tumors have a central sclerotic nidus similar to osteoid osteoma
The behaviour pattern of the scoliosis associated with osteoid osteoma
or osteoblastoma of the spine.
CT guided radiofrequency (RF) ablation has proved to be a very effective, minimally invasive, and safe technique that can be used in the treatment of osteoid osteoma
, and has emerged as the treatment of choice in symptomatic lesions.
Ablations in bone benefit from the oven effect as the bone cortex traps heat within the medulla contributing to complete necrosis of the nidus in the case of osteoid osteoma
. A standard safety procedure is to maintain a distance of 1cm from the probe to vital structures such as nerves, blood vessels and skin.
Recurrence rate is less than 10% with power burr.8 A new non-invasive radiation-free method is under observation - magnetic resonance guided focussed ultrasound ablation technique - which focuses ultrasound waves on osteoid osteoma
If the nidus is clearly expressed, the possibility of diagnosing osteoid osteoma
timely and providing adequate treatment increases.
Table 2 Common Locations of Pediatric Bone Lesions Epiphyseal Lesions Metaphyseal Lesions Diaphyseal Lesions Chondroblastoma Enchondroma Osteoid Osteoma
Aneurysmal Bone Cyst Aneurysmal Bone Cyst Eosinophilic Granuloma Osteomyelitis Fibrous Dysplasia Osteofbrous Dysplasia Giant Cell Tumor of Bone Osteochondroma Ewing's Sarcoma (older) Unicameral Bone Cyst Nonossifying Fibromas Osteomyelitis Osteosarcoma Please Note: Illustration(s) are not available due to copyright restrictions.
Initial radiographic films (Figure 1) were read as unremarkable; however, given high clinical suspicion of osteoid osteoma
, an MRI was obtained which demonstrated a circular hypointense lesion along the dorsal aspect of the trapezium (Figure 2) suspicious for an osteoid osteoma
Histopathologically, the periphery of the cementum-like tissue presents more active growth, and sometimes, resembles osteoblastoma, osteoid osteoma
, or atypical osteosarcoma, which are not distinctively related to tooth roots, and may be difficult to distinguish from these tumors [3, 5].
These reports suggested that the eccentric area could be an osteoid osteoma
or a NOF.