Accuracy of KRAS mutation screening: To test the accuracy of screening KRAS, DNA from 29 pre-tested samples (15 FNAs and 14 FFPEs, 17 thyroid and 12 non-thyroid cancers) with known KRAS mutation status were tested on the two Q48 platforms in the laboratory (Q48 #1 and Q48 #2) and results were compared. The gene discussed is KRAS; the disease is thyroid gland disorder.