Age distribution, polyps and rectal cancer in the Egyptian population-based cancer registry

Table 2 Age and clinical characteristics of study population in Gharbiah, Egypt (1999-2007)

Variable	n (%)
Age(yr)
<40	300 (22.0)
≥40	1064 (78.0)
Basis of diagnosis
Histology of primary	1210 (88.7)
Histology of metastases	58 (4.3)
Death certificate only	52 (3.8)
Others1	44 (3.2)
Tumor site
Colon	856 (62.8)
Right	347 (40.5)
Left	331 (38.7)
NOS	178 (20.8)
Rectum	508 (37.2)
Grade
I	96 (7.0)
II	702 (51.5)
III	155 (11.4)
IV	61 (4.5)
Unknown	350 (25.7)
Polyps
Present	38 (2.8)
< 40 yr	9 (23.7)
≥ 40 yr	29 (76.3)
Male	19 (50.0)
Female	19 (50.0)
Not present	1326 (97.2)
Mucinous carcinoma
Present	318 (23.3)
< 40 yr	102 (32.1)
≥ 40 yr	216 (67.9)
Not present	1046 (76.7)
Histopathology
Adenocarcinoma	1186 (87.0)
Carcinomas2	50 (3.7)
Other specified types of cancers	16 (1.2)
Unspecified types of cancers	112 (8.2)