| HRA003776
(Controlled Access)
|
The 437panel sequencing of 114 nodules in 36 patients found that EGFR accounted for the largest proportion (55.3%), followed by ERBB2 (9.6%), BRAF, and KRAS (8.8%). Fusion target variation is extremely rare (only 2, 1.8%). ERBB2 Y772_A775dup accounted for 73%, KRAS G12C accounted for about 18%, and BRAF V600E accounted only 10%. ARID1A mutations were significantly higher in invasive adenocarcinoma (IA) containing solid/micro-papillary malignant components (P=0.008). The tumor mutation burden (TMB) distribution is low, with a median TMB of 1.1. In addition, 97.2% of patients (35/36) with MPLC had driver gene mutations, and 47% had co-mutations, mainly in IA (45%) and invasive adenocarcinoma (MIA) (37%) nodule. MPLC has a unique genetic mutation characteristic that differs from advanced patients and usually presents with low TMB. |