dysthymia

dysthymia A type of depressive disorder that involves long-term, chronic symptoms that are not disabling but that nonetheless keep a person from full function or from feeling good. Dysthymia is a less severe type of depression than major depression. However, people with dysthymia may also sometimes experience major depressive episodes, suggesting that there is a…

dysplastic nevus

dysplastic nevus A mole whose appearance is different from that of common moles. Dysplastic nevi are generally larger than ordinary moles, and they have irregular borders. Their color is often not uniform. They are usually flat, but parts may be raised above the skin surface. Dysplastic nevi can be precancerous. See cancer, skin.