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Review Question - QID 3010

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QID 3010 (Type "3010" in App Search)
A 17-year-boy has had chronic hip pain for the last 8 months that no longer responds to nonsteroidal anti-inflammatory medications. He reports that the pain is worse at night. He is afebrile and laboratory studies, including an ESR, C-reactive protein, and CBC are within normal limits. Radiographs, computed tomography, and a bone scan are shown in Figure A, B, and C respectively. What is the next step in management?
  • A
  • B
  • C

CT guided biopsy

9%

246/2708

CT of chest , abdomen, and pelvis

5%

141/2708

CT guided radiofrequency ablation

78%

2110/2708

En bloc surgical resection resection

1%

38/2708

Open surgical curettage with chemical cauterization and cementing

6%

160/2708

  • A
  • B
  • C

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The clinical and radiograhic presentation are consistent with osteoid osteoma. The first line of treatment, which should include observation and NSAID administration, has failed so the next step in treatment should be CT guided radiofrequency ablation.

Volkmer et al discusses the use of radiofrequency ablation and state indications for radiofrequency ablation of osteoid osteomas are when medical management fails, the lesion is leading to a scoliotic deformity, or the lesion is periarticular placing the patient at increased risk of cartilage injury and premature degenerative disease.

Moser et al present a therapeutic case series (level IV evidence) that shows an overall clinical success rate of 98% (of 68 patients) when using image-guided laser ablation to treat osteoid osteomas in pediatric patients.

The final reference by Lee et al is a review article of osteoid osteomas.

Incorrect Answers:
Answer 1: A CT guided biopsy alone is not indicated as the clinical and radiographic presentation are diagnostic and it is not worth the added risks of an additional procedure.
Answer 2: Based on imaging studies alone we can establish the diagnosis, and therefore a workup for a malignant process is not required.
Answer 4 & 5: The osteoid osteoma in this case does not meet any surgical indications.

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