CancerClark level IV skin cancer Share Tweet Skin cancer that has spread down into the reticular dermis (the thick bottom layer of the dermis).Source: NCI Dictionary of Cancer TermsSearch the Glossary of Medical Terms Previous: Clark level III skin cancer Next: Clark level V skin cancer NewsletterSign up for the QuackTrack.org newsletter below! Click to commentLeave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment *Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ QuackTrack on TwitterTweets by QuackTrack_org Trending Posts