[CLINICAL STUDIES ON CHRONIC COLITIS BY BIOPSY AND CYTOLOGY].
D001706:Biopsy; D003585:Cell Biology; D002908:Chronic Disease; D003092:Colitis; D003093:Colitis, Ulcerative; D003581:Cytodiagnosis; D006801:Humans; D012812:Sigmoidoscopy
BIOPSY; CHRONIC DISEASE; COLITIS; COLITIS, ULCERATIVE; CYTOLOGY; SIGMOIDOSCOPY