<prompt> Characteristic pathological finding in carcinoid of heart:Fibrous endocordial thickening of right ventricle and tricuspid valveCollagen deposition in wall of right ventricleInterstitial fibrous thickening of right ventriclesMononuclear inflammatory infiltrate in the wall  <response>: Ans. a Fibrous endocordial thickening of right ventricle and tricuspid valveRef: Robbins 9thpg 562; Heart 2004; 90:1224-1228 doi:10.1136hrt.2004.040329Carcinoid heart disease;Characteristic pathological findings are endocardial plaques of fibrous tissue that may involve the tricuspid valve Q, pulmonary valve Q, cardiac chambers, venae cavae, pulmonary artery, and coronary sinus. 