Malignant melanotic nerve sheath tumors in the spinal canal of psammomatous and non psammomatous type: Two case reports Psammomatous melanotic schwannoma a rare neck lump The Annals of The Royal College of Surgeons of England At MRI, spinal melanotic schwannoma is usually located along a spinal nerve root, The presence of paramagnetic free radicals in melanin creates characteristic T1 hyperintensity and T2 hypointensity, any ddx? #radiology #radiologist # Surgical management of malignant melanotic nerve sheath tumors: an institutional experience and systematic review of the literat Psammomatous Melanotic Schwannoma DoveMed Malignant Melanotic Nerve Sheath Tumor of the Neck: A Case Report Applied Radiation Oncology