[Biopsy of small intestine in Crohn's disease of terminal ileum and/or colon; a histoligical and electron microscopical study (author's transl)].

Jejunal suction biopsies of 41 patients suffering from Crohn's disease of terminal ileum and/or colon were studied histoligically. No typical alteration induced by Crohn's disease were found by light microscope. In order to detect minimal alteration specimen of 7 patients were also examined by electron microscope. The substructure of epithelial cells, cellular conjunctions, basement membranes, nerves and vessels showed no remarkable changes. Only an increased infiltration of lymphocytes and plasma cells were observed.