1

Colon tumor localization, incidence, multiplicity and size in rats exposed to DMH

Parameters
No. of rats10
Total colon
  No. of tumor-bearing rats10 (100%)
  No. of tumors25
  No. of tumors per tumor-bearing rat2.5
  Mean size of tumors, mm261±12.8
Ascending colon
  No. of tumor-bearing rats2 (20%)
  No. of tumors3 (12%)
  No. of tumors per tumor-bearing rat1.5
  Mean size of tumors, mm289±37.8
Transverse colon
  No. of tumor-bearing rats1 (10%)
  No. of tumors1 (4%)
  No. of tumors per tumor-bearing rat1
  Size of the tumor, mm227
Descending colon
  No. of tumor-bearing rats9 (90%)
  No. of tumors17 (68%)
  No. of tumors per tumor-bearing rat2
  Mean size of tumors, mm256±14.4
Rectum
  No. of tumor-bearing rats4 (40%)
  No. of tumors4 (16%)
  No. of tumors per tumor-bearing rat1
  Mean size of tumors, mm270±75.9