Kumar Nilesh
Department of Oral and Maxillofacial Surgery, School of Dental Sciences, KIMSDU, Karad, Satara, Maharashtra, India.
J Nat Sci Biol Med. 2015 Jan-Jun;6(1):267-71. doi: 10.4103/0976-9668.149229.
Extra-cranial schwannomas although common in head and neck region are very rarely seen originating from the infra-orbital nerve. We report a case of schwannoma arising from infra-orbital nerve in a 40-year-old male patient. The case presented as an isolated, asymptomatic, slow growing sub-cutaneous nodular swelling over left side of mid-face. On ultrasonography, a localized lesion within the sub-cutaneous tissue of cheek was observed, without involvement of orbital, maxillary sinus or underlying bone. Aspiration biopsy of the lesion showed spindle shaped cells predominantly arranged in Antoni A pattern around verocay bodies, with less organized Antoni B tissue in few places. Diagnosis of schwannoma, probably arising from terminal branch of infra-orbital nerve was established. The tumor was approached through skin incision. At the time of exploration, the lesion was found to emanate from the nerve trunk of peripheral branch of infra-orbital nerve, which was dissected and preserved. We correlate our experience with previously reported cases of infra-orbital nerve schwannoma.
颅外神经鞘瘤虽然在头颈部区域较为常见，但起源于眶下神经的情况却极为罕见。我们报告一例40岁男性患者眶下神经起源的神经鞘瘤。该病例表现为孤立的、无症状的、生长缓慢的左侧面中部皮下结节状肿胀。超声检查发现脸颊皮下组织内有一个局限性病变，未累及眼眶、上颌窦或其下方骨质。病变的穿刺活检显示梭形细胞主要围绕Verocay小体呈Antoni A型排列，少数地方有组织较疏松的Antoni B型组织。确诊为可能起源于眶下神经终末支的神经鞘瘤。通过皮肤切口对肿瘤进行处理。探查时发现病变起源于眶下神经外周支的神经干，对其进行了解剖并保留。我们将我们的经验与先前报道的眶下神经鞘瘤病例进行了对比。
