Table 2

Characteristics of patients with CRC

All patients with CRC; n (%)127 (29.3)
Patients with two synchronous primary CRCs; n (%)8 (1.8)
Patients with metachronous CRC; n (%)9 (2.1)
Age at diagnosis first CRC; median (range)60.8 (20.3–84.7)
WHO subtype; n (%)
 Criterion-133 (26.0)
 Criterion-344 (34.6)
 Criterion 1+350 (39.4)
Moment of diagnosis CRC (144 cancers); n (%)*
 Before diagnosis SPS74 (51.4)
 At diagnosis SPS68 (47.2)
 During surveillance2 (1.4)
Location CRC (144 cancers); n (%)
 Caecum14 (9.7)
 Ascending colon31 (21.5)
 Transverse colon24 (16.7)
 Descending colon6 (4.2)
 Rectosigmoid69 (47.9)
  • *Carcinomas detected between diagnosis of SPS and clearing of all relevant polyps were included in the ‘at diagnosis’ group.

  • CRC, colorectal cancer; SPS, serrated polyposis syndrome.