partial response


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partial response

the condition in which the maximum decrease in treated tumor volume is at least 50% but less than 100%.

partial response

Abbreviation: PR
In cancer care, a reduction in the size of readily identifiable tumors by 50% or more.
See also: response
References in periodicals archive ?
Nearly half of evaluable patients in the trial have achieved a best response of stable disease (SD) or better, including two partial responses (PR) according to RECIST (Response Evaluation Criteria in Solid Tumors) guidelines.
Two patients with ovarian cancer achieved a partial response based on reduction in the levels of the tumor marker CA-125.
Of these, 14 patients (78 percent) achieved a response of stable disease or better (10 to 38 weeks), including 3 unconfirmed partial responses according to RECIST (Response Evaluation Criteria in Solid Tumors) criteria.
At week 16, eight percent of patients (3/39) demonstrated a partial response, 21 percent (8/39) had stable disease and 49 percent (19/39) had disease progression.
All three patients with stable disease and one of the patients with a partial response are still receiving their first course of SGN-30 therapy.

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