Table I.

Patient characteristics.

Patient no.	Age/gender	Tumor location from anal verge (cm)	Maximum diameter (cm)	Resection margin	Final pathology
1	62/F	4.0	2.7	Negative	pT2, mod, ly(−), v(+)
2	64/M	3.0	3.0	Negative	pT1 (4,000 µm), well, ly(−), v(+)
3	68/F	3.0	2.0	Negative	pT1 (4,000 µm), well, ly(−), v(−)
4	48/M	4.0	3.0	Negative	pT1 (4,000 µm), well, ly(−), v(−)
5	76/F	6.0	1.5	Negative	pT1 (2,500 µm), mod, ly(−), v(+)
6	60/M	6.0	2.3	Negative	pT1 (4,500 µm), mod, ly(−), v(+)

The depth of T1 invasion is indicated (as × µm); well, well-differentiated adenocarcinoma; mod, moderately differentiated adenocarcinoma; ly, lymphatic invasion; v, venous invasion; F, female; M, male.