Pseudopolyps are features of-
Isolated islands of regenerating mucosa often bulge into the lumen to create small elevations, termed as pseudopolyps in Ulcerative Colitis TEXTBOOK OF ROBBINS BASIC PATHOLOGY NINTH EDITION PAGE.590 IMAGE REF: TEXTBOOK OF PATHOLOGY HARSH MOHAN, 6TH EDITION, FIG: 20.27 PAGE :568
Crohn's disease
Ulcerative colitis
Celiac sprue
Whipple's disease
G.I.T