Correlation between KRAS and NRAS mutational status and clinicopathological features in 414 cases of metastatic colorectal cancer in Morocco: the largest North African case series

Table 1 Clinicopathological features of patients

	N	%
Age, years
≤ 60	198	47.8
> 60	216	52.8
Gender
Female	199	48
Male	215	52
Tumor tissue
Primary	361	87.2
Metastasis	53	12.8
Liver	29	7
Peritoneum	11	2.7
Lung	8	1.9
Bladder	3	0.7
Ovary	2	0.5
Primary tumor site
Left-sided colon	300	72.5
Right-sided colon	111	26.8
Not specified	3	0.7
Histological type
Adenocarcinoma, NOS	373	90
Mucinous adenocarcinoma	34	8.2
Poorly cohesive carcinoma	4	1
Neuroendocrine small cell carcinoma	3	0.7
Differentiation
Well differentiated	155	37.4
Moderately differentiated	224	54.1
Poorly differentiated	35	8.5
RAS Status
Mutation	226	54.6

ISSN: 1471-230X