noun which may take the genitive case particle 'no', noun
Medical term meaning a condition arises spontaneously or from an unknown cause, not secondary to another disease. Used in compounds like 原発性高血圧 (primary hypertension).
Primary aldosteronism is one cause of secondary hypertension.
primary pulmonary hypertension
primary biliary cirrhosis
primary immunodeficiency syndrome
primary hyperparathyroidism
primary macroglobulinemia