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. 2020 Jul 18;1(3):100076. doi: 10.1016/j.jtocrr.2020.100076

Table 4.

Distribution of EGFR and KRAS Mutations According to Histologic Subtypes and Pathologic Stage

EGFR and KRAS Mutations Total Number = 512, n (%)
EGFR mutations, n 201
 Histologic subtypes
 Adenocarcinoma 196 (97.5)
 Papillary predominant 119 (59.2)
 Acinar predominant 35 (17.5)
 Lepidic predominant 24 (11.9)
 Solid predominant 18 (8.9)
 Pleomorphic 1 (0.5)
 Adenosquamous 2 (1)
 Squamous 1 (0.5)
 Clear cell 1 (0.5)
 Pathologic stage
 IA 132 (65.7)
 IB 17 (8.5)
 IIA 4 (1.9)
 IIB 21 (10.4)
 IIIA 27 (13.5)
KRAS mutations, n 42
 Histologic subtypes
 Adenocarcinoma 35 (83.4)
 Papillary predominant 12 (28.5)
 Invasive mucinous 11 (26.1)
 Lepidic predominant 3 (7.1)
 Solid predominant 3 (7.1)
 Acinar predominant 1 (2.3)
 Large 7 (16.6)
 Pathologic stage
 IA 17 (40.4)
 IB 7 (16.7)
 IIA 3 (7.2)
 IIB 8 (19.0)
 IIIA 7 (16.7)