Beitner H, Nakatani T, Hammar H
DOI: 10.2340/0001555571360363

A case of Crohn's disease complicated by Sweet's syndrome is presented. The main ultrastructural findings were the multiplication of basal lamina surrounding the venulea, interendothelial gaps and in perivascular locations mixed infiltrates of neutrophiles and erythrocytes. The changes indicate that the initial site of the reaction was the walls of the dermal vessels.