1 MCQs in Pathology for NEET PG
A 32-year-old undernourished man presents with 8 weeks of low-grade evening fever, night sweats, weight loss, and productive cough with hemoptysis. Chest radiograph shows an upper lobe cavitary lesion with right hilar lymphadenopathy. Sputum AFB smear is 2+ positive and GeneXpert MTB/RIF confirms *Mycobacterium tuberculosis* with rifampicin susceptibility. Histopathology of a resected lung lobe shows multiple firm granulomas with characteristic architecture. The structure marked **A** in the diagram—the central zone of caseous necrosis—is composed of acellular, granular, pink material. Which of the following best describes the pathological significance of this caseous center in tuberculosis?
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