A benign 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 benign perivascular tumor (Monarch Disease Ontology term MONDO_0003342). Also known as: benign Pericytic neoplasm, benign Pericytic tumor, benign Pericytic tumour, benign pericytic neoplasm, benign perivascular neoplasm, pericytic neoplasm, benign.