Up to 12% of these tumours still confined to the bowel wall have already spread to regional lymph nodes.

The five year survival rate of borderline and malignant tumors confined to the ovaries are 100% and 70% respectively.

These tumors tend to be aggressive, the five year survival rate for tumors confined to the ovaries is approximately 65%.

For larger tumors confined to the kidney without venous invasion, survival is still relatively good at 80-85%.

Stage I is a small tumor confined to nasopharynx.

Papillary carcinoma that has invaded adjacent cervical tissue has a worse prognosis than tumors confined to the thyroid.

Follicular carcinoma invading cervical tissue has a worse prognosis than tumors confined to the thyroid gland.

Asymptomatic small tumors confined to the esophageal mucosa or submucosa are detected only by chance.

In the case of borderline tumors confined to the ovary and malignant tumors without invasion, the survival rates are 90% or greater.

Standard-risk was defined as tumor confined to the liver and not involving more than three sectors.