Osteoid osteoma

Case contributed by Dr Ahmed Subaie


Back pain.

Patient Data

Age: 40 years old
Gender: Female

Focal area of sclerosis is noted in the left pedicle of 5th lumbar vertebra.


This is a multi sequential MRI which shows focal area of low T1 and T2 signal intensity related to sclerosis in the left pedicle of L5. There is a central area of high signal intensity within the sclerotic area which shows enhancement post contrast administration. Bone edema is also noted, especially on T2FS sequence.

Case Discussion

Osteoid osteoma is a benign bone lesion that usually present with pain especially at night that relieved by aspirin:

  • on CT it is usually seen as a central sclerotic area, with lucency surrounding reactive bone formation
  • on MRI the sclerotic area appears as low T1 and T2 signal intensities and the nidus is low on T1, high on T2 with enhancement post contrast administration
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Case information

rID: 24216
Published: 31st Jul 2013
Last edited: 8th Jun 2018
Inclusion in quiz mode: Included

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