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Aneurysmal bone cyst of the parietal bone. Case report
S Ulivieri1, G Oliveri, C Miracco
1Dipartimento di Neurochirurgia, Ospedale Santa Maria alle Scotte, Siena, Italia. simone.ulivieri@tiscali.it
Pathologica
|August 9, 2008
Summary
Aneurysmal bone cysts are benign bone lesions. This report details an unusual case of an aneurysmal bone cyst occurring in the parietal bone, a rare cranial site.
Area of Science:
- Orthopedic Surgery
- Pathology
- Radiology
Background:
- Aneurysmal bone cyst (ABC) is a benign, expansile, osteolytic bone lesion of unknown etiology.
- ABC commonly affects the spine and flat bones, with long bone involvement being less frequent.
- Cranial involvement is exceptionally rare, representing 3-6% of all ABC cases.
Observation:
- This report presents an unusual case of an aneurysmal bone cyst (ABC) located in the parietal bone.
- Skull involvement by ABC is rare, typically occurring in the first three decades of life.
- Histological examination reveals a blood-filled multiloculated cavity lined by fibroblasts and multinucleated giant cells.
Findings:
- The study documents a rare instance of aneurysmal bone cyst in the parietal bone.
- This finding highlights the potential for ABC to occur in unusual cranial locations.
- Histopathological features confirmed the diagnosis of aneurysmal bone cyst.
Implications:
- This case expands the known spectrum of aneurysmal bone cyst (ABC) presentation.
- Highlights the importance of considering rare diagnoses in cranial bone lesions.
- Contributes to the understanding of aneurysmal bone cyst (ABC) pathogenesis and distribution.