A benign or malignant mesenchymal neoplasm arising from the perivascular cells of the connective and soft tissues. It is characterized by the presence of pericytes that grow in a circumferential pattern around vessels. The disease is Monarch Disease Ontology term MONDO_0002604 (pericytic neoplasm). Also known as: Pericytic neoplasm, Pericytic tumor, Pericytic tumour, perivascular neoplasm, perivascular tumor, perivascular tumour.