Ammar ALNAGEEB, Ali Ufuk KEÇEBAŞ, Said Mohammad HOSAINY, Gurbat AZIZLI, Kadir OKTAY
Çukurova Anestezi ve Cerrahi Bilimler Dergisi - 2026;9(2):546-550
Objective: The aim of this study was to present the clinical, radiological, and surgical features of a rare giant frontal aneurysmal bone cyst (ABC) with orbital, sinonasal, and anterior cranial fossa extension in an adolescent patient. Methods: This study was designed as a single-patient case report. A 15-year-old boy presenting with progressive painless right orbital swelling and visual impairment was included. Clinical examination, computed tomography (CT), and magnetic resonance imaging (MRI) were performed for diagnostic evaluation. Histopathological confirmation was obtained through endonasal biopsy. The patient underwent total microsurgical excision via bicoronal craniotomy using neuronavigation and CUSA assistance. Postoperative clinical and radiological follow-up findings were evaluated. Results: Radiological investigations demonstrated a multiloculated expansile lesion involving the frontal bone, ethmoid and maxillary sinuses, nasal cavity, and anterior cranial fossa with significant orbital compression. Histopathologically examination confirmed the diagnosis of aneurysmal bone cyst. Total surgical resection was successfully achieved without intraoperative complications. Postoperatively, ocular movements returned to normal in all directions, visual acuity improved from 4/10 to 10/10, and no cerebrospinal fluid leakage or neurological deficits were observed. Conclusion: Giant cranial aneurysmal bone cysts involving the skull base and orbit are extremely rare lesions that may present with rapidly progressive orbital symptoms. Combined radiological and histopathological evaluation is essential for accurate diagnosis. Complete surgical excision remains the optimal treatment strategy and may provide excellent functional and cosmetic outcomes.
