MedGen

A nevus is a type of hamartoma that is a circumscribed stable malformation of the skin. [from HPO]

A oval and round, colored (usually medium-to dark brown, reddish brown, or flesh colored) lesion. Typically, a melanocytic nevus is less than 6 mm in diameter, but may be much smaller or larger. [from HPO]

Persistent or frequent inner feelings of anger, irritability, or resentment that may be in response to an action or statement by others that is perceived to be a slight or challenge to the person regardless of the nature. Anger may also occur or arise spontaneously in the absence of any provocation and can be directed to another person or social entity. [from HPO]