After diagnosing Kaposi’s sarcoma, doctors will often attempt to figure out if it has spread and to what extent. Most doctors use the AIDS Clinical Trial Group system to stage Kaposi’s sarcoma. This system considers three factors: the extent of the tumor, the status of the immune system, and the extent of systemic illness. Under each of the three groups, two categories determine whether there is a good risk (0) or poor risk (1). For example, a ranking of T0 means that the tumor is localized to a small area. A ranking of T1 means the lesions are widespread and dangerous.

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