*1.Please list your last name and zip code:(Required.)

Last name:

ZIP/Postal Code:

*2.What is your specialty?(Required.)

*3.How many patients with colorectal cancer do you treat each week?(Required.)

1 to 10

11 to 25

26 to 50

I am not directly involved in patient care

*4.True or False: In a patient with known Lynch syndrome, it is unnecessary to test tumors for microsatellite instability/mismatch repair deficiency.(Required.)

True

False

*5.In a patient with colon cancer and loss of MLH1/PMS2 by IHC, which subsequent genomic finding would most likely convince you of sporadic dMMR?(Required.)

KRAS mutation

KRAS wild-type

BRAF V600E mutation

BRAF V600E wild-type