Sacro-iliac joints; observations of the gross and histological changes in the various age groups.
D004194:Disease; D006801:Humans; D007592:Joint Diseases; D007596:Joints; D012446:Sacroiliac Joint; D013166:Spondylitis; D013167:Spondylitis, Ankylosing / Q000473:pathology*
SACROILIAC JOINT/diseases; SPONDYLITIS, ANKYLOSING/pathology