This document discusses peritoneal tuberculosis and tuberculous mesenteric lymphadenitis. It provides details on the clinical presentation, pathology, types, investigations and treatment for each condition. Peritoneal tuberculosis typically presents with abdominal distension, obstruction, pain and weight loss. Chronic cases can lead to ascites or adhesions. Tuberculous lymphadenitis most commonly involves the right mesenteric lymph nodes and may cause obstruction, presenting like appendicitis. Investigations include imaging, fluid analysis and Mantoux testing. Both conditions are generally treated with anti-tubercular drugs, and sometimes surgery is needed for complications like obstruction.