A benign or malignant extra-adrenal parasympathetic paraganglioma arising from paraganglia adjacent to or in the bifurcation of the common carotid artery. Most patients present with a slow growing, painless mass in the neck. The disease is Monarch Disease Ontology identifier MONDO_0021053 (carotid body paraganglioma). Also known as: paraganglioma of carotid body.