Definition:
After treatment completion, an individual is generally assessed for response after a period of time to allow maximal regression of the tumor. At the end of that period if there is some disease remaining but a reduction of disease by 30% or more on clinical examination or x-rays and scans – it is called partial response (or partial regression).
Partial response (PR) implies that further treatment will probably be required to attempt a cure. In some slow growing tumors (including low grade lymphomas) no further treatment may be immediately necessary till the disease starts increasing in size again.
Understand more about other terms used in assessing treatment response in the article How is treatment response described?
Also Known As: PR
