abnormality in the tissue of an organism

A lesion is any damage or abnormal change in the tissue of an organism, usually caused by disease or trauma. Lesion is derived from the Latin laesio "injury".[1] Lesions may occur in plants as well as animals.

Lesion on the nose


  1. "Lesion...What Does The Doctor Mean?". MedicineNet. Retrieved 2016-03-03.