Psammomatous melanotic schwannoma a rare neck lump The Annals of The Royal College of Surgeons of England Malignant Peripheral Nerve Sheath Tumor grows in the soft tissues such as muscle, fat, tendons, ligaments, lymph and blood vessels, nerves, and other tissue that connects and supports the body. It also Malignant Melanotic Nerve Sheath Tumor A Pitfall in the Diagnosis of Schwannoma Michael E. Kallen, Rima Koka, Petr F. Hausner, Amin Benyounes, 2025 Interosseous Malignant Melanotic Nerve Sheath Tumor of the Sacrum Treated With an Innovative Reconstruction Technique Cureus