PT - JOURNAL ARTICLE AU - Alsabbagh, Badriah M. AU - Alessa, Awn AU - Aljohani, Hanan AU - Alhammad, Othman TI - Large skull osteoblastoma presented as aneurysmal bone cyst (ABC) AID - 10.17712/nsj.2023.4.20230060 DP - 2023 Oct 01 TA - Neurosciences Journal PG - 277--280 VI - 28 IP - 4 4099 - http://nsj.org.sa/content/28/4/277.short 4100 - http://nsj.org.sa/content/28/4/277.full SO - Neurosciences (Riyadh)2023 Oct 01; 28 AB - Aneurysmal bone cysts (ABCs) are rare benign vascular bony lesions mostly encountered in young patients. These cysts can occur as primary lesions or, less frequently, secondary to other pathologies such as osteoblastomas. Skull ABCs are rare and can extend intracranially, presenting with hydrocephalus and bleeding. Here we illustrate the case of a 9-year-old male who presented with headache, nausea, and vomiting, without neurological deficit. Radiological investigations showed a soap-bubble lesion with mass effect over the right cerebellum. The patient underwent right sub-occipital craniotomy with marginal wide resection of the cystic lesion. The patient had excellent outcomes. The histopathological report was consistent with osteoblastoma with an aneurysmal bone cyst.