Colorectal carcinoma in Lagos and Sagamu, Southwest Nigeria: A histopathological review

Table 1 Site and gender distribution and histological types of CRC in patients 40 yr and above compared with those below 40 yr n (%)

	40 yr and above	Below 40 yr
Site
Cecum	23 (7.14)	11 (11)
Ascending colon	20 (6.21)	4 (4)
Transverse colon	13 (4.04)	6 (6)
Descending colon	13 (4.04)	2 (2)
Recto sigmoid	194 (60.25)	52 (53)
Unspecified	59 (18.32)	23 (23)
Total	322 (100)	98 (100)
Histological grade
Well differentiated adenocarcinoma	191 (59.3)	42 (43)
Moderately differentiated adenocarcinoma	63 (19.6)	25 (26)
Poorly differentiated adenocarcinoma	38 (11.8)	7 (7)
Mucinous carcinoma	15 (4.7)	19 (19)
Signet Ring carcinoma	2 (0.6)	3 (3)
Undifferentiated	13 (4)	2 (2)
Total	322 (100)	98 (100)
M:F ratio	1.3:1	1.2:1

Table 2 Pathological staging of 123 cases of CRC

Duke's stage	n (%)	TNM staging	n (%)
A	17 (14)	Stage I	17 (14)
B	64 (52)	Stage IIA	54 (43)
C	41 (33)	Stage IIB	10 (8)
D	1 (1)	Stage IIIA	13 (11)
		Stage IIIB	28 (23)
		Stage IV	1 (1)