Imaging and Outcomes for a New Entity: Low-Grade Sinonasal Sarcoma with Neural and Myogenic Features

• Published in: Journal of neurological surgery reports Vol. 78; no. 1; pp. e15 - e19
• Main Authors: Cannon, Richard B., Wiggins, Richard H., Witt, Benjamin L., Dundar, Yusuf, Johnston, Tawni M., Hunt, Jason P.
• Format: Journal Article
• Language: English
• Published: Stuttgart · New York Georg Thieme Verlag KG 01.01.2017
• Subjects: Case Report; hyperostotic bone formation; imaging characteristics; locally aggressive; low-grade sinonasal sarcoma with neural and myogenic features; sinonasal sarcoma; skull base malignancy; surgical outcomes; low-grade sinonasal sarcoma with neural and myogenic features; surgical outcomes; sinonasal sarcoma; imaging characteristics; skull base malignancy; hyperostotic bone formation; locally aggressive
• ISSN: 2193-6358; 2193-6366
• DOI: 10.1055/s-0037-1598198

Abstract Objectives  Low-grade sinonasal sarcoma with neural and myogenic features (LGSSNMF) is a new, rare tumor. Our goal is to describe the imaging characteristics and surgical outcomes of this unique skull base malignancy. Design  Retrospective case series. Setting  Academic medical center. Participants  There were three patients who met inclusion criteria with a confirmed LGSSNMF. Main Outcome Measures  Imaging and histopathological characteristics, treatments, survival and recurrence outcomes, complications, morbidity, and mortality. Results  Patients presented with diplopia, facial discomfort, a supraorbital mass, and nasal obstruction. Magnetic resonance imaging and computed tomography imaging in all cases showed an enhancing sinonasal mass with associated hyperostotic bone formation that involved the frontal sinus, invaded the lamina papyracea and anterior skull base, and had intracranial extension. One patient underwent a purely endoscopic surgical resection and the second underwent a craniofacial resection, while the last is pending treatment. All patients recovered well, without morbidity or long-term complications, and are currently without evidence of disease (mean follow-up of 2.1 years). One patient recurred after 17 months and underwent a repeat endoscopic skull base and dural resection. Conclusions  The surgical outcomes and imaging of this unique, locally aggressive skull base tumor are characterized.