PMID- 31720191 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 11 IP - 9 DP - 2019 Sep 22 TI - Delayed Diagnosis of Ankylosing Spondylitis: A Missed Opportunity? PG - e5723 LID - 10.7759/cureus.5723 [doi] LID - e5723 AB - Ankylosing spondylitis is an inflammatory condition involving the axial spine, often associated with the human leukocyte antigen (HLA)-B27 genotype and supporting radiographic imaging findings. Patients develop symptomatic low back and/or hip pain beginning in late adolescence or early adulthood. Diagnosis of ankylosing spondylitis is based primarily on clinical presentation and imaging studies. In this article, we are presenting a case of a 40-year-old male patient who presented to the office with chief concerns of chronic mid-thoracic back pain and restricted range of motion of his neck. The imaging study obtained was suggestive of fusion of the sacroiliac joints. This article also highlights the presence of elevated inflammatory markers in the setting of the patients chronic symptomatic complaints which could have guided in early diagnosis. CI - Copyright (c) 2019, Patel et al. FAU - Patel, Pooja AU - Patel P AD - Rheumatology, Advocate Aurora Health, Brookfield, USA. FAU - Hussain, Hira AU - Hussain H AD - Family Medicine, St. George's University School of Medicine, Ft. Lauderdale, USA. FAU - Fahey, John AU - Fahey J AD - Rheumatology, Advocate Aurora Health, Brookfield, USA. LA - eng PT - Case Reports DEP - 20190922 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC6823060 OTO - NOTNLM OT - ankylosing spondylitis OT - chronic low back pain OT - inflammatory arthritis OT - inflammatory markers OT - iritis OT - spondyloarthropathy OT - stiffness COIS- The authors have declared that no competing interests exist. EDAT- 2019/11/14 06:00 MHDA- 2019/11/14 06:01 PMCR- 2019/09/22 CRDT- 2019/11/14 06:00 PHST- 2019/11/14 06:00 [entrez] PHST- 2019/11/14 06:00 [pubmed] PHST- 2019/11/14 06:01 [medline] PHST- 2019/09/22 00:00 [pmc-release] AID - 10.7759/cureus.5723 [doi] PST - epublish SO - Cureus. 2019 Sep 22;11(9):e5723. doi: 10.7759/cureus.5723.