T3nomo colon cancer stage 2a had perforation is that high risk?

Partially yes. The staging information is generally favorable. The T3 (liothyronine) means that this tumor was involving the bowel wall but not the surrounding organs and this may have contributed to the perforation during the dissection. My advise is when you see an oncologist, make sure to point out this information. Even though you are node negative, the oncologist may be more willing to recommend chemotherapy to be safer.
Yes, it is high risk. Perforation is one of the high risk features. Thus, adjuvant chemotherapy will be recommended after surgery to decrease risk for recurrence and increase survival. See an oncologist and discuss further with the oncologist.

Related Questions

What will be the cause for 29 years old girl diagnose for colon cancer? Colon abscess? Perforation? Diverticulitis? Stage 2a (t3nomo)

Hereditary cancer. I am sorry for your condition. Stage 2a- is curable. I wish you the best for your therapy etc. If the cancer occurs at a very young age- like 29-in this case-a possibility of genetic mutation/hereditary cancer syndrome should be evaluated. Read more...
Hereditary. Abscesses, perforations, and diverticulitis are not known to cause colon cancer. Colon cancer in a young person may be due to an inherited cancer susceptibility problem like lynch (hnpcc) or gardner's (fap), especially if there is a family history. Genetic counseling and tests can be done to determine if there is a hereditary genetic predisposition. Read more...
Genetics. If she has a perforation, she is unfortunately stage IV and should be treated as such in terms of chemotherapy. Colon cancer at such a young age is genetics. Her siblings and all 1st degree relatives should be screened off the testing from her colon cancer. Read more...

Colon cancer age 30?? RUQ pain, fecal occult test negative- CT- Normal- (GI tract WNL no obstruction or perforation) should I get colonoscopy for pain

Probably. Colon cancer is unlikely in your age group, but other GI and colon diseases can also cause such symptoms. Have you had your gallbladder evaluated? Remember, colon cancer has minimal symptoms and CT is NOT a great test for it. In sum though low yield I would likely recommend colonoscopy to you based on what I've read. Read more...