Physiologic vertebral ligamentous calcification:  an aging process.
D002113:Calcification, Physiologic; D003937:Diagnosis, Differential; D004194:Disease; D006801:Humans; D008022:Ligaments; D013122:Spinal Diseases; D013131:Spine; D013166:Spondylitis / Q000175:diagnosis*
CALCIFICATION; LIGAMENTS; SPINE/diseases; SPONDYLITIS/differential diagnosis