Glossary
Atypical
(ay-TIH-pih-kul)
Not normal. Describes a state, condition, or behavior that is unusual or different from what is considered normal. In medicine, an atypical lesion or growth in or on the body may be benign (not cancer), precancerous or premalignant (likely to become cancer), or malignant (cancer). Also called abnormal.
Definition from the National Cancer Institute’s NCI Dictionary of Cancer Terms.