Cancerparietal pericardium Share Tweet The outer layer of the pericardium, which is a thin sac of tissue that surrounds the heart.( puh-RY-uh-tul PAYR-ih-KAR-dee-um )Source: NCI Dictionary of Cancer TermsSearch the Glossary of Medical Terms Previous: parietal cell vagotomy Next: parietal peritoneum 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 Click to commentLeave a Reply Cancel replyYour email address will not be published.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