Table 1. Description of clinical variables of mCRC samples.

	N	%
Sex
Male	20	58.8
Female	14	41.4
Age at diagnosis
<50	11	32.4
⩾50	23	67.6
Localisation
Colon right-sided	10	29.4
Colon left-sided	15	44.1
Rectum	9	26.5
Treatment
Cetuximab	20	58.8
Panitumumab	14	41.2
Associated chemotherapy
Monotherapy	4	11.8
Irinotecan	5	14.8
FOLFIRI	21	61.8
FOLFOX	4	11.8
RECIST score
Complete response	0	0.00
Partial response	11	32.4
Stabilisation	11	32.4
Progression	12	35.3
Line of treatment
First line	4	11.8
Second line	13	38.2
Third line	17	50.0
Number of metastatic sites
1	12	35.3
2	13	38.2
3	9	26.5
Mutations in PIK3CA
WT	29	85.3
Mutant	5	14.7
Mutations in BRAF
WT	33	97.1
Mutated	1	2.9

Abbreviations: mCRC=metastatic colorectal cancer; WT=wild type.