[Masked late forms of Bechterew's disease].
D003937:Diagnosis, Differential; D006801:Humans; D013166:Spondylitis; D013167:Spondylitis, Ankylosing / Q000175:diagnosis*
SPONDYLITIS, ANKYLOSING/differential diagnosis
Unerkannte Spätformen der Bechterwschen Erkrankung.