Tuberculosis is a major public health problem in Bangladesh. Caseous necrosis is the key histomorphological feature for the diagnosis of tuberculosis. This cheesy material is described microscopically as amorphous granular debris. But it has a number of variations in color, appearance, inflammatory cellular content, cellular debris and apoptotic bodies. Does it contain Mycobacteria? Many authors believe that it contains numerous tubercle bacilli, but microscopically it is difficult to demonstrate. Why? Chemical composition of caseous necrosis is another unsolved problem. It is cheesy as...