SLIDE 4 https://www.oncotech.org/gim21
Alessandra Fabi Michelangelo Russillo Edoardo Pescarmona Simonetta Buglioni Paolo Romania Francesco Cognetti Gianluigi Ferretti
TTZ/PTZ + taxanes etc Cycle 1 T-DM1 Cycle 2 T-DM1 Cycle 3 T-DM1 Cycle n T-DM1
relapse
progression Trastuzumab
(T-DM1)
Progression by ctDNA Progression by PET
VAF Blood drawings
0,0% 1,0% 2,0% 3,0% 4,0% 5,0% 6,0%
1 2 3 4 5 6 7 8 9
Lead time: 2.1 months
pt#1 age 54
Progression by ctDNA Progression by CT scan
Blood drawings
0,0% 0,2% 0,4% 0,6% 0,8% 1,0%
1 2 3 4 5 6 7 8 9 101112
Lead time: 2.8 months
pt#2 age 59
Blood drawings
Progression by ctDNA Progression by PET
0,00% 0,04% 0,08% 0,12% 0,16% 0,20%
1 3 5 7 9 11 13
Lead time: 0.9 months
pt#3 age 38
0,0% 0,2% 0,4% 0,6% 0,8% 1,0%
1 2 3 4 5 6 7 Progression by ctDNA Progression by PET
Lead time: 2.9 months Blood drawings
pt#7 age52
primary resistance adaptive resistance Long response
Allegretti, M. … and Fabi, A. 2019, in preparation
response + adaptive resistance
Monitoring T-DM1 treated patients by liquid biopsy
Matteo Allegretti Elena Giordani