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Your diagnosis? Aneurysmal bone cyst.

Parag J Patel1, Terrence C Demos, Laurie M Lomasney

  • 1Department of Radiology, Loyola University Medical Center, Maywood, IL 60153, USA.

Orthopedics
|June 11, 2005
PubMed
Summary
This summary is machine-generated.

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Aneurysmal bone cysts (ABCs) are benign lesions, often occurring in young patients. Surgical treatment offers a good prognosis, but recurrence is possible in 10-20% of cases.

Area of Science:

  • Orthopedics
  • Radiology
  • Pathology

Background:

  • Aneurysmal bone cysts (ABCs) are benign, expansile bone lesions of uncertain etiology.
  • They can be primary or secondary to other bone pathologies.
  • ABCs predominantly affect individuals under 20 years old.

Observation:

  • Lesions commonly occur in long bones (50%) and the spine (33%).
  • Pelvic involvement accounts for approximately 10% of flat bone lesions.
  • Characteristic fluid-fluid levels are visible on CT and MRI, though not exclusive to ABCs.

Findings:

  • Despite being benign, ABCs can exhibit aggressive clinical and imaging features.
  • The etiology may involve a localized arteriovenous malformation.

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Implications:

  • Standard treatment involves surgical curettage, adjuvant therapy, and bone grafting.
  • Prognosis post-treatment is generally favorable.
  • A recurrence rate of 10-20% necessitates vigilant follow-up.