Melanotic schwannoma mimicking metastatic pigmented melanoma: a pitfall in cytological diagnosis A para aortic malignant melanotic nerve sheath tumor mimicking a gastrointestinal stromal tumor: a rare case report and review of literature BMC Surgery Springer Nature Link Melanotic Schwannoma Basicmedical Key Primary Psammomatous Melanotic Schwannoma of the Spine ScienceDirect Psammomatous melanotic schwannoma a rare neck lump The Annals of The Royal College of Surgeons of England View of Malignant melanotic nerve sheath tumor with PRKAR1A, KMT2C and GNAQ mutations Free Neuropathology