GA. Ph.2/Breast scan timing (RECIST). Some more digging – I believe it works this way: everybody gets scanned every 8 weeks, except when a patient goes to PR/CR (at any point), he/she gets a one-time “confirmation” scan 4 weeks later (and then goes back to every 8 weeks). Examples:
Patient tests SD after 1st 8-week scan, and stays that way: 8, 16, 24, 32 . . .
Patient tests PR after 1st 8-week scan, and stays that way: 8, 12, 20, 28 . . .
Patient is SD at 8wks, but upgrades to PR at wk16: 8, 16, 20, 28 . . .
Patient is PR at 8 weeks, but slides back to SD at wk12: 8, 12, 20, 28 . . .
RECIST Criteria: 1. COMPLETE RESPONSE (CR) = 100% reduction 2. PARTIAL RESPONSE (PR) = 30-99% reduction . . . [OBJECTIVE RESPONSE (OR) = CR + PR = 30-100% red.] 3. STABLE DISEASE (SD) = 29% reduction – 19% increase 4. PROGRESSIVE DISEASE (PD) = 20% increase or more **ALSO: "to be assigned to SD or PR, patients cannot have the appearance of any new lesions."
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