Several tests can help distinguish a benign lump from a malignant tumor.

"A benign lump usually has well-defined, clear borders that are not irregular."

The rest of the women have benign lumps.

Uterine fibroids are benign lumps that grow inside the uterus.

These benign lumps are especially common in adolescent boys, and can come and go over a man's lifetime.

It removed the benign but disconcerting lump in Rosie Stelzner's jaw.

However, in 2008, she had a benign lump removed from her breast.

The only safe way to distinguish between a benign lump and cancer is to have the tissue examined by a doctor through a biopsy.

Also, without a biopsy, most tests cannot tell a tumor from a benign lump, as dogs apparently can.

Their cancers were not found earlier, but they had more biopsies for benign lumps.