Clinical features and long-term outcomes of patients with colonic oligopolyposis of unknown etiology

Table 4 Clinical features of 11 patients with a significant clinical outcome (cancer, advanced dysplasia, or colectomy)

ID (Gender)	Colectomy (age) (yr)	Colectomy – indication	Surveillance (No. yr to colectomy; Total yr)	Total adenoma burden	No. FDR with CRC	No. SDR with CRC
26 (F)	RHC (62)	IMC	12; 16	Multiple (at least 34)	0	0
29(M)	SIG (52)	IMC	0; 12	Multiple at least 15	0	0
76(F)	IPAA (42)	IMC	0; 14	Multiple (at least 15)	0	0
32(M)	IRA (64)	Polyp burden	0; 1	Multiple (>30, many > 1 cm)	0	0
46(M)	IRA (65)	Polyp burden + recurrent diverticulitis	15; 24	Multiple (at least 47)	0	0
72(M)	IRA (69)	Polyp burden	12; No data post colectomy	Multiple (at least 31)	0	0
62(F)	IPAA (58)	Polyp burden	3; 8.5	Multiple (approx. 83)	0	1 (65)
37(M)	APR (63)	Rectal CRC a	0; 17	27	1 (66)	0
56(F)	SIG (71)	Sigmoid CRC1	0; 4.5	38	1 (68)	0
68(F)	Colectom3(69)	Transverse CRC2	1; No data post colectomy	Multiple (at least 28)	1 (70)	0
82(M)	None(70)	SigmoidMP4	15; 16	16	0	0

¹CRC diagnosed at 1^st colonoscopy.

²CRC diagnosed at 3^rd colonoscopy.

³No data about the type of colectomy.

⁴Resected endoscopically.

Adenoma burden, surgical data and familial burden of CRC (1^st and 2^nd degree relatives) of 11 patients who had a significant clinical outcome. CRC: Colorectal cancer; F: Female; M: Male; MP: Malignant polyp; IMC: Intramucosal carcinoma; RHC: Right hemicolectomy; IRA: Subtotal colectomy with ileorectal anastomosis; IPAA: total proctocolectomy with ileal pouch anal anastomosis; APR: abdominoperineal resection; SIG: sigmoidectomy; FDR: First-degree relative.