title: Ochronotic spondyloarthropathy.
authors.affiliation: Assistant Professor, Department of Radiodiagnosis and Imaging, Saveetha Medical College and Hospital , Thandalam, Kanchipuram, Tamilnadu - 602105, India .
authors.forename: Upasana
authors.initials: U
authors.lastname: Ranga
authors.forename: Senthil Kumar
authors.initials: SK
authors.lastname: Aiyappan
authors.forename: Natarajan
authors.initials: N
authors.lastname: Shanmugam
authors.forename: Saveetha
authors.initials: S
authors.lastname: Veeraiyan
keywords: Alkaptonuria; Intervertebral disc calcification; Vacuum phenomenon
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