peripheral nervous system neoplasm (Monarch Disease Ontology identifier MONDO_0001406) is a benign or malignant neoplasm arising from a peripheral nerve or the perineural sheaths. Also known as: PNS neoplasm, PNS neoplasms, PNS tumor, PNS tumour, neoplasm of PNS, neoplasm of peripheral nerve, neoplasm of peripheral nervous system, neoplasm of the PNS.