Aneurysmal Bone Cyst Clinical Presentation

Updated: Apr 17, 2023
  • Author: Nicholas Tedesco, DO, FAAOS; Chief Editor: Omohodion (Odion) Binitie, MD  more...
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History and Physical Examination

Patients with an aneurysmal bone cyst (ABC) usually present with pain, a mass, swelling, a pathologic fracture, or a combination of these symptoms in the affected area. The symptoms are usually present for several weeks to months before the diagnosis is made, and the patient may also have a history of a rapidly enlarging mass. Neurologic symptoms associated with ABCs may develop secondary to pressure or tenting of the nerve over the lesion, typically in the spine.

Pathologic fracture occurs in about 8% of ABCs, but the incidence may be as high as 21% in ABCs that have spinal involvement.

Other findings may include the following:

  • Deformity
  • Decreased range of motion, weakness, or stiffness
  • Reactive torticollis
  • Occasionally, bruit over the affected area
  • Warmth over the affected area