Depicting multiple schwannomas—a tale of two magnetic resonance neurogram techniques

Hong Kong Medical Journal ©2022 Hong Kong Academy of Medicine. CC BY-NC-ND 4.0 A 40-year-old female with unremarkable past health and no known family history of neurofibromatosis presented with a 3-year history of non-specific discomfort at the right submandibular region and upper neck. No facial nerve dysfunction was evident clinically. Ultrasound of the major salivary glands revealed a soft tissue nodule posterior to the right submandibular gland. Fine needle aspiration cytology findings were compatible with schwannoma. Subsequent magnetic resonance imaging (MRI) revealed a cluster of nodules within the deep lobe of the right parotid gland with a linear orientation. Further delineation with high-resolution MRI and neurography sequences with acquisition of double-echo steady state (DESS) [Fig 1] and postcontrast constructive interference in steady state (CISS) [Fig 2] sequences delineated these nodules arising eccentrically from the main trunk, inferior PICTORIAL MEDICINE