Sheikh Muhammad Mubbashir, De Jesus Orlando
Feinberg School of Medicine
University of Puerto Rico, Medical Sciences Campus, Neurosurgery Section
Schwannomas (also known as neuromas, neurinomas "of Verocay," and neurilemmomas) are benign, well-encapsulated, slow-growing nerve sheath tumors composed exclusively of Schwann cells derived from the neural crest. The tumor can originate from any myelinated central or peripheral nerve with Schwann cells. The World Health Organization classifies schwannoma as a grade I benign tumor. Schwannomas are solitary in 90% of the cases. Multiple tumors in the same patient should bring attention to syndromic associations (neurofibromatosis type 2, schwannomatosis, and Carney complex).
施万细胞瘤（也称为神经瘤、“维罗凯”神经鞘瘤和神经鞘膜瘤）是一种良性、包膜完整、生长缓慢的神经鞘肿瘤，仅由源自神经嵴的施万细胞组成。该肿瘤可起源于任何含有施万细胞的有髓中枢或周围神经。世界卫生组织将施万细胞瘤归类为I级良性肿瘤。90%的施万细胞瘤为单发。同一患者出现多个肿瘤时，应注意是否存在综合征相关性（2型神经纤维瘤病、施万细胞瘤病和卡尼综合征）。
