Blue nevi are moles that appear blue. They are often noncancerous, but make sure to regularly monitor them for changes. Although the cause isn’t clear, blue nevi often appear in children and young ...

The diagnosis is nevus comedonicus. Nevus comedonicus is a rare hamartoma of the pilosebaceous gland unit. It presents clinically as a group of comedo-like dilated pores and sometimes with overlying ...