​A round,flat area usually distinguished from its surrounding skin by its change in color

A) bulla
B) macule
C) tumor

Macule

A discolored spot or patch on the skin neither elevated nor depressed.

Skin Lesion

Any change in the color or texture of the skin, often regarded as an abnormality, ranging from rashes and blisters to tumors.

Bulla

A large blister containing serous fluid that appears on the skin, often as a result of burns, infections, or other skin conditions.