[Inflammatory joint disease affecting the spine. It occurs predominantly in young males and produces pain and stiffness as a result of inflammation of the sacroiliac, intervertebral, and costovertebral joints. Etiology is unknown. ( MSH )]
UMLS (CSP) C0038013 Relation/PAR: ankylosis
Arthritis, Rheumatoid
INFLAM SPONDYLOPATHY NOS