Isolated Sigmoid Tuberculosis Complicated by Colovesical Fistula

Overview

Expand on the specific advanced imaging techniques and molecular diagnostics used.

Background

Intestinal tuberculosis (ITB) is often under-recognized and typically affects the ileocecal region. Isolated sigmoid involvement is rare and can easily be misdiagnosed as colorectal malignancy or Crohn's disease due to overlapping clinical presentations. Understanding these atypical presentations is crucial for timely diagnosis and treatment.

Data Highlights

No numerical data or trial data presented in the article.

Key Findings

• Isolated sigmoid tuberculosis can present as a tumor-like lesion with colovesical fistula formation.
• Initial histopathology may show nonspecific inflammation without granulomas, complicating diagnosis.
• Advanced diagnostic techniques, including acid-fast bacilli staining and metagenomic next-generation sequencing, are essential for accurate identification of ITB.
• Empirical antimicrobial therapy may fail to control symptoms, highlighting the need for thorough diagnostic evaluation.
• Timely initiation of anti-tuberculosis therapy can lead to rapid clinical improvement and resolution of complications.

Clinical Implications

Healthcare professionals should consider ITB in the differential diagnosis of sigmoid lesions, especially when typical histological findings are absent. Integrating imaging and molecular diagnostics can facilitate early and accurate diagnosis, preventing misdiagnosis and ensuring appropriate treatment.

Conclusion

This case underscores the importance of recognizing atypical presentations of intestinal tuberculosis and the need for comprehensive diagnostic approaches to avoid misdiagnosis. Early identification and treatment can significantly improve patient outcomes.

Related Resources & Content

1. Unusual Spread of Perineal Tuberculosis to the Right Flank: A Reflection on J.P. Nesselrod’s 1936 Research on Pelvic Lymphatic Anatomy in the Annals of Surgery, 2012 -- https://link.springer.com/article/10.1007/s00384-012-1624-2
2. Ascending complex anal fistula secondary to lower extremity soft tissue infection: a case report, Frontiers in Surgery, 2026 -- https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2026.1823865/full
3. Fistulizing Crohn's disease, Mayo Clinic -- https://medprofvideos.mayoclinic.org/videos/fistulizing-crohn-s-disease
4. Transforming intestinal tuberculosis management: advances in diagnostics, therapeutics, and prevention, Journal of Rare Diseases -- https://link.springer.com/article/10.1007/s44162-025-00090-1?utm_source=openai
5. WHO consolidated guidelines on tuberculosis. Module 4: Treatment and care, 2025 -- https://www.ncbi.nlm.nih.gov/books/NBK613092/pdf/Bookshelf_NBK613092.pdf
6. Unusual Spread of Perineal Tuberculosis to the Right Flank: A Reflection on J.P. Nesselrod’s 1936 Research on Pelvic Lymphatic Anatomy in the Annals of Surgery
7. Frontiers in Surgery — Ascending complex anal fistula secondary to lower extremity soft tissue infection: a case report
8. mayo clinic — Fistulizing Crohn's disease
9. Frontiers in Surgery — Case Report: Strangulated transverse colon inguinal hernia complicated by cecal perforation in a patient with sclerosing mesenteritis
10. WHO releases an update to the operational handbook on diagnosis of tuberculosis
11. Transforming intestinal tuberculosis management: advances in diagnostics, therapeutics, and prevention | Journal of Rare Diseases | Springer Nature Link
12. WHO consolidated guidelines on tuberculosis. Module 4: Treatment and care.