Imaging in gynecological disease: clinical and ultrasound characteristics of benign retroperitoneal pelvic nerve sheath tumors.

On ultrasound, benign PNSTs were solid, non-uniform, moderately vascular tumors without acoustic shadowing. Most were round, containing small, irregular, anechoic, cystic spaces, and hyperechoic areas, consistent with degenerative changes on pathology. All tumors were well-circumscribed by a hyperechogenic rim composed of epineurium. No imaging characteristics reliably differentiated between schwannomas and neurofibromas. In fact, they overlap with the ultrasound appearance of malignant tumors. Hence, ultrasound-guided biopsy plays a pivotal role in diagnosis, and if confirmed as benign PNSTs, these tumors can undergo ultrasound surveillance. This article is protected by copyright. All rights reserved.