Antibodies to <i>Escherichia coli</i> Outer Membrane Porin C in the Absence of Anti–<i>Saccharomyces cerevisiae</i> Antibodies and Anti‐neutrophil Cytoplasmic Antibodies Are an Unreliable Marker of Crohn Disease and Ulcerative Colitis

Abstract

Anti-OmpC, in the absence of ASCA and ANCA, is a serological pattern noted in a subset of medically complex cases in children and young adults without CD or UC.