Intestinal tuberculosis Mimicking Crohn's Disease with concomitant axial spondyloarthritis: A diagnostic and therapeutic challenge
Abstract
Introduction: Intestinal tuberculosis (ITB) represents a major diagnostic challenge in endemic regions owing to its substantial clinical and endoscopic overlap with Crohn's disease (CD). This complexity is further amplified when ITB is accompanied by inflammatory musculoskeletal manifestations that resemble axial spondyloarthritis (axSpA), thereby increasing the risk of diagnostic misclassification and potentially hazardous therapeutic decisions, particularly with respect to the use of immunosuppressive agents.
Case report: A clinical case is presented involving a young woman with chronic diarrhea and progressive inflammatory back pain. The diagnostic workup comprised laboratory investigations, imaging studies, colonoscopy with histopathological analysis, microbiological testing, and longitudinal monitoring throughout the course of anti-tuberculous therapy.
Results: Colonoscopy revealed inflammatory lesions suggestive of CD; however, histopathological examination demonstrated large confluent granulomas with central necrosis and acid-fast bacilli (AFB) positivity, establishing the diagnosis of ITB despite initially negative molecular assays and cultures. Radiological findings, inflammatory back pain, and HLA-B27 positivity were consistent with axSpA. Anti-tuberculous therapy led to marked mucosal improvement, although persistent microbiological evidence necessitated extension of treatment duration to nine months. Management of spondyloarthritis was initiated only after…
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