动脉瘤性骨囊肿是一种少见的良性膨胀性溶骨的瘤样病变,好发于长骨及脊柱,于颅骨者很少见。此病在临床、X线和病理上易与骨的各种良性或恶性病变混淆。作者曾遇到一例鼻、筛窦部位的动脉瘤性骨囊肿,今报导如下。 Aneurysmal bone cyst is a rare, benign, dilated osteolytic tumor-like lesion that occurs in long bones and the spine. It is rare in skulls. The disease is easily confused with various benign or malignant lesions of bone in clinical, X-ray and pathology. The author encountered a case of an aneurysmal bone cyst at the nasal and ethmoid sinuses, as reported today.