Histopathological Insights into Granulomatous Lesions: A Comprehensive Study

Area of Science:

• Pathology
• Immunology
• Dermatology

Background:

• Granulomatous inflammation is a persistent immune response involving histiocytes, epithelioid cells, and giant cells.
• It is associated with various viral and non-infectious diseases, classified as a type IV delayed hypersensitivity reaction.

Purpose of the Study:

• To analyze the prevalence and characteristics of granulomatous lesions in a specific patient cohort.
• To identify the common etiological agents and histological patterns of granulomatous inflammation.

Main Methods:

• A cross-sectional study of 100 cases with granulomatous lesions was conducted.
• Histopathological examination utilized Hematoxylin and Eosin (H&E) stain, with special stains (Ziehl-Neelsen, PAS) applied as needed.
• Clinical data including age, sex, lesion site, and duration were recorded.

Main Results:

• Granulomatous lesions were most common in the third and fourth decades, with a female predilection (1:1.43 ratio).
• Gastrointestinal tract (16%) was the most frequent site, followed by the urogenital tract (15%) and soft tissues (13%).
• Granulomatous pathology-not otherwise specified (52%) was most prevalent, followed by granulomatous pathology-tubercular (15%). Tuberculosis accounted for 25% of etiologies.

Conclusions:

• Histopathology remains the gold standard for diagnosing and classifying granulomatous lesions.
• Despite BCG vaccination, tuberculosis is identified as the leading cause of granulomatous lesions in the studied community.