“…As detailed earlier, functional MRN is valuable for detecting features suspicious for diagnosing a malignant PNST. 46,47 The malignant tumors are often large (> 4 cm) at diagnosis, may demonstrate local infiltration into adjacent tissues, foci of necrosis, foci of increased cellularity (low ADCmin < 1.0 Â 10 À3 mm 2 /s), extracapsular extension, and rapid interval growth. 48 Benign PNSTs include schwannoma, neurofibroma (both localized and diffuse/plexiform types), perineurioma, and hybrid PNSTs (e.g., schwannoma and neurofibroma).…”