Intestinal tuberculosis: clinicopathologic analysis and diagnosis by endoscopic biopsy

Area of Science:

• Gastroenterology
• Infectious Diseases
• Pathology

Background:

• Intestinal tuberculosis is a significant cause of granulomatous colitis in developing nations.
• Accurate diagnosis from endoscopic biopsies can prevent invasive procedures and unnecessary surgeries.

Purpose of the Study:

• To evaluate clinical, pathological, and diagnostic findings in intestinal tuberculosis patients using endoscopic biopsy.
• To compare the efficacy of various diagnostic methods for intestinal tuberculosis.

Main Methods:

• Analysis of 42 intestinal tuberculosis patients from January 1991 to December 1996.
• Application of tissue culture, immunohistochemical stain, Ziehl-Neelsen stain, and polymerase chain reaction (PCR) on fresh and fixed tissues.
• Comparison of pathological findings with diagnostic method results.

Main Results:

• Characteristic colonoscopic findings included transverse ulcers with surrounding hypertrophic mucosa.
• Granulomas were present in 74% of cases, with diagnostic method positivity ranging from 30-45%.
• Ziehl-Neelsen stain positivity increased with more biopsy particles, while PCR positivity decreased in fixed tissues.

Conclusions:

• Transverse ulcers and granulomas are key indicators of intestinal tuberculosis.
• Tissue culture, Ziehl-Neelsen stain, and PCR offer reliable diagnostic results.
• Endoscopists should obtain sufficient, deep biopsy samples from ulcer bases for improved diagnosis.