To highlight the diagnostic challenges of isolated sigmoid tuberculosis (ITB) presenting as a tumor-like lesion complicated by colovesical fistula, which can lead to misdiagnosis.
Key Findings:
Isolated sigmoid colonic tuberculosis is rare and can mimic colorectal malignancy or Crohn's disease, complicating diagnosis.
Initial histopathology may not reveal granulomas, which can delay appropriate treatment.
Integration of imaging, immunological testing, special staining, and mNGS is crucial for accurate diagnosis and timely intervention.
Interpretation:
This case emphasizes the need to consider ITB in differential diagnoses for sigmoid lesions, particularly when typical histological findings are absent, to avoid misdiagnosis.
Limitations:
The case is based on a single patient experience, limiting generalizability.
Initial histopathological findings may not represent all cases of ITB, and further studies are needed to validate these findings.
Conclusion:
Timely diagnosis of ITB can prevent misdiagnosis and ensure appropriate treatment.
