Diminution of tendon reflexes, which is an invariable sign of peripheral nerve disease. The phenotype is Human Phenotype Ontology term HP_0001315 (Reduced tendon reflexes). Also known as: Absent or decreased deep tendon reflexes, Decreased deep tendon reflexes, Decreased tendon reflexes, Decreased to absent deep tendon reflexes, Decreased/absent deep tendon reflexes, Depressed tendon reflexes, Diminished deep tendon reflexes, Diminished or absent deep tendon reflexes.