What it ismean of granuloma?

A granuloma is a small area of inflammation in tissue, typically formed in response to chronic infection, irritation, or foreign substances. It consists of a collection of immune cells, primarily macrophages, that aggregate to wall off substances the body cannot eliminate. Granulomas are commonly associated with conditions such as tuberculosis and sarcoidosis. Their formation is part of the body's immune response to contain and isolate harmful agents.