What kind of lesions are typically associated with Tb post mortem?

In the context of tuberculosis (Tb) post mortem findings, granulomas are the characteristic lesions observed. Granulomas are organized aggregates of macrophages that have transformed into epithelioid cells, often surrounded by a layer of lymphocytes. This formation is part of the body's immune response to the Mycobacterium tuberculosis infection. When the immune system attempts to contain the bacteria, it creates these granulomas in infected tissues, which can be visible during autopsy.

In cases of tuberculosis, granulomas can be found in various organs, especially in the lungs but also in lymph nodes and other tissues. Their presence is indicative of the body's attempt to isolate the infection and prevent its spread, and can often be identified through histological examination of tissue samples after death.

Other lesion types such as cysts, tumors, or ulcers are not typically associated with tuberculosis in the context of post-mortem findings. Cysts are fluid-filled sacs that can occur in other conditions, tumors imply uncontrolled cell proliferation which is not characteristic of an infectious process like tuberculosis, and while ulcers can be caused by many factors, they are not specifically indicative of tuberculosis on their own. Therefore, the identification of granulomas as a specific lesion type highlights their importance in understanding the pathological