Shen Chih-Yu, Chow Nan-Haw, Tsai Yuh-Shyan
Department of Urology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
J Med Ultrasound. 2021 Jan 9;29(2):123-125. doi: 10.4103/JMU.JMU_68_20. eCollection 2021 Apr-Jun.
Schwannomas, namely neurilemmomas, are benign nerve sheath tumors and comprise the myelin sheaths around the peripheral nerves. Schwannomas commonly occur in the head and neck, or extremities, less found in the mediastinum and retroperitoneum, and rarely in the pelvis. We report a 40-year-old male presenting with an 18-month history of nocturia and urinary frequency. Transrectal ultrasound revealed a well-defined, 2.81 cm × 3.77 cm in size, homogeneous, hypoechoic mass in the tail of the left seminal vesicle, compatible with the finding of a well-demarcated mass at the left seminal vesicle with homogeneous contrast enhancement on computed tomography. He underwent laparoscopic excision of the mass via da Vinci robotic surgical system. Intraoperative sonography showed that the mass exhibited the majority of hypoechoic density with some hyperechoic spots inside. Pathology reveals schwannoma. Both of erectile and ejaculatory functions were claimed postoperatively. Our case report highlights the potential of either intraoperative or preoperative sonography in the assessment of the seminal vesicle schwannoma.
施万细胞瘤，即神经鞘瘤，是一种良性神经鞘肿瘤，由周围神经的髓鞘组成。施万细胞瘤常见于头颈部或四肢，较少见于纵隔和腹膜后，很少见于骨盆。我们报告一例40岁男性，有18个月的夜尿症和尿频病史。经直肠超声显示左精囊尾部有一个边界清晰、大小为2.81 cm×3.77 cm、均匀的低回声肿块，与计算机断层扫描显示的左精囊边界清晰的肿块及均匀的对比增强结果相符。他通过达芬奇机器人手术系统接受了腹腔镜下肿块切除术。术中超声显示肿块大部分为低回声密度，内部有一些高回声斑点。病理显示为施万细胞瘤。术后患者的勃起和射精功能均得以保留。我们的病例报告强调了术中或术前超声在评估精囊施万细胞瘤方面的潜力。
