Iida Yu, Sakata Katsumi, Kobayashi Natsuki, Tatezuki Junya, Manaka Hiroshi, Kawasaki Takashi
Department of Neurosurgery, Yokohama City University Medical center, 4-57 Urafune-cho, Minami-ku, Yokohama, Kanagawa 232-0024, Japan.
NMC Case Rep J. 2016 Sep 1;3(4):107-109. doi: 10.2176/nmccrj.cr.2015-0259. eCollection 2016 Oct.
Intraorbital schwannoma is a rare tumor which accounts for about 1-2% of all neoplasms of the orbit. Orbital schwannomas most commonly arise from the sensory branches of the trigeminal nerve. On the other hand, intraorbital abducens nerve schwannomas are extremely rare, with a search of the English literature identifying only four cases of intraorbital abducens nerve schwannoma. This is the 5th reported case of an orbital schwannoma arising from the terminal branch of the abducens nerve to the lateral rectus muscle. We report a case of an intraorbital abducens nerve schwannoma in a 51-year-old man with no signs of neurofibromatosis. The tumor was totally excised with functional preservation of the nerve by a zygomatic approach with lateral orbitotomy. With knowledge of these anatomic features, total removal of the tumor with preservation of the abducens nerve function might be possible.
眶内神经鞘瘤是一种罕见肿瘤，约占眼眶所有肿瘤的1%-2%。眼眶神经鞘瘤最常起源于三叉神经的感觉分支。另一方面，眶内展神经神经鞘瘤极其罕见，检索英文文献仅发现4例眶内展神经神经鞘瘤。这是第5例报道的起源于展神经至外直肌终末支的眼眶神经鞘瘤。我们报告1例51岁男性眶内展神经神经鞘瘤患者，无神经纤维瘤病体征。通过颧部入路联合外侧眶切开术，完整切除肿瘤并保留神经功能。了解这些解剖特征后，有可能在保留展神经功能的情况下完整切除肿瘤。
