What is the difference between radiculitis and radiculopathy?

Radiculopathy is a term that refers to compression, injury, or dysfunction of a spinal nerve root.

Radiculitis is a term that describes inflammation of a spinal nerve root and may accompany radiculopathy.

Both can result in radicular pain, which is pain that radiates in a dermatomal pattern that is innervated by that particular nerve root. Other sequelae of radiculopathy/radiculitis may include muscle weakness and atrophy, decreased deep tendon reflexes, as well as the possibility of affecting autonomic nerves.