{'fraction_non_alphanumeric': 0.023636363636363636, 'fraction_numerical': 0.007272727272727273, 'mean_word_length': 6.0576923076923075, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Central Nervous System Tuberculosis-Clinicopathologic Characteristics

Tuberculosis is a chronic granulomatous infection occurring due to Mycobacterium tuberculosis, a slow growing, gram-positive rod, which is resistant to acid decoloration when stained with aniline dyes. Tuberculosis is endemic in developing countries, but even in the developed countries after an initial decline up to 1980s, the incidence of tuberculosis is on the rise. Central nervous system (CNS) tuberculosis is a serious, often fatal disease predominantly affecting young children. The CNS involvement comprises approximately 10% to 15% of all tuberculosis infections. Granulomatous inflammatory reaction in CNS caused by Mycobacterium tuberculosis may involve the meninges, brain, spinal cord, and the bones covering the brain and spinal cord, and may manifest clinically as tubercular meningitis, tuberculomas in brain, tubercular brain abscess, tuberculous encephalopathy, spinal tuberculosis and tuberculomas. This review focuses on the various patterns of CNS tuberculosis and various modalities used for the diagnosis.