The following may occur in untreated cases:- A. Spread of original lesion. This includes direct spread to adjacent lung; direct spread to pleura, leading to pleural involvement, thickening, adhesions, T.B. pleural effusion, T.B. empyema; bronchial spread; laryngeal involvement and haematogenous spread. B. Breakdown of original lesion + cavitation : fibrosis, bronchiectasis: haemoptysis. The above conditions and other problems relating to chronic T.B. are discussed alongwith various psychological problems such as anxiety and depression on the part of the patient, loss of initiative and addiction to alcohol.