title: Unusual manifestation of hypocalcaemia.
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D006801:Humans; D006996:Hypocalcemia / Q000175:diagnosis* / Q000209:etiology; D007011:Hypoparathyroidism / Q000150:complications*; D008297:Male; D013167:Spondylitis, Ankylosing / Q000175:diagnosis