title: Identification of Blastocystis hominis by colonic brush cytology. A case report.
abstract: Blastocystis hominis is a unicellular organism the pathogenic potential of which in humans remains unclear. It may be identified during a workup for gastrointestinal symptoms, usually in stool examined for ova and parasites. We describe a case in which B hominis was identified by cytologic examination in a patient with Crohn's disease who underwent colonoscopy and brushing of a transverse colon stricture. The morphologic features of this organism are described and contrasted with those of the uninucleate cyst form of Entamoeba histolytica.
authors.affiliation: Department of Pathology, Pennsylvania Hospital, Philadelphia 19107.
authors.forename: E A
authors.initials: EA
authors.lastname: Dellers
authors.forename: J C
authors.initials: JC
authors.lastname: Dunn
authors.forename: P
authors.initials: P
authors.lastname: DeSantis
authors.forename: C A
authors.initials: CA
authors.lastname: Aronchick
mesh_terms: D000368:Aged; D000818:Animals; D016776:Blastocystis Infections / Q000175:diagnosis* / Q000473:pathology; D016845:Blastocystis hominis / Q000302:isolation & purification*; D003108:Colonic Diseases / Q000469:parasitology* / Q000473:pathology; D003424:Crohn Disease / Q000469:parasitology / Q000473:pathology; D003581:Cytodiagnosis / Q000379:methods; D005260:Female; D006801:Humans