Remission in a patient who was treated for a solid tumor is the disappearance of the tumor and the absence of related signs and symptoms.
Remission in a patient who was treated for a hematological malignancy (i.e., a cancer of cells in the blood) is the disappearance of cancer cells in the body and the absence of related signs and symptoms.
A partial response (abbreviated PR) of a cancer to treatment is a significant decrease in either the size of a tumor or the number of cancer cells in the body, but not a complete disappearance of the tumor or a complete absence of cancer cells in the body.
A complete response (abbreviated CR) of a cancer to treatment is either the complete disappearance of a tumor or a complete absence of cancer cells in the body.
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