Our health care system is like one of those tumors growing in my patients.

Around then I got a tumor growing in my bladder.

Doctors told the owner that the tumors could have been growing for up to a year.

Do all such tumors eventually grow and spread, or only some?

There may be swelling as well, if the tumor has been growing for a long time.

However, these tumors can grow to be quite large before they are detected.

A better understanding of how tumors form and grow could lead to new treatments.

Four of the patients on this study had previous surgery, but their tumor grew back.

And although the tumor may grow at first, it will shrink over time.

In some patients, the tumor grows so slowly that treatment is not necessary.