Occipital Chondroblastic Osteosarcoma in a Pediatric Patient: Imaging Features of a Rare and Aggressive Tumor

Abstract

Primary osteosarcoma of the skull base is a very rare entity, representing less than 2% of all skull tumors. The chondroblastic subtype is the most frequent in this particular localization, the outcome remains poor. Imaging features are not well illustrated in literature. We report the case of a pediatric patient presenting a primary osteosarcoma of the occipital bone revealed by an occipital lump and signs of cranial hypertension. Pathology examination confirmed the diagnosis of chondroblastic osteosarcoma.