title: Bowel "dissection" in microvillus inclusion disease.
abstract: A preterm male neonate was diagnosed as having microvillus inclusion disease based on the characteristics of histological and ultrastructural findings. The peripheral blood sample also revealed MYO5B mutation. He had been on long-term parenteral nutrition. However, a bowel segment was seen in the baby's diaper during hospitalization when he was 5 months old. Serial abdominal ultrasound demonstrated progressive dissection of the bowel wall with detached mucosa in real-time. Small intestinal epithelia were seen on the histology of the detached bowel segment. He died 2 weeks after the episode; postmortem autopsy showed diffuse detachment of mucosa of small bowels without perforation. This is the first report of an infant with microvillus inclusion disease that presented with bowel "dissection". Weakened adhesion and integrity of intestinal epithelial cells caused by MYO5B mutation was speculated to result in the dissection and detachment of the epithelia of the gastrointestinal tract.
authors.affiliation: Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Graduate Institute of Clinical Medical Sciences, Chang Gung University, College of Medicine, Taoyuan, Taiwan.
authors.forename: Ming-Chou
authors.initials: MC
authors.lastname: Chiang
authors.affiliation: Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
authors.forename: Jen-Fu
authors.initials: JF
authors.lastname: Hsu
authors.affiliation: Department of Pathology, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
authors.forename: Chuen
authors.initials: C
authors.lastname: Hsueh
authors.affiliation: Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
authors.forename: Hsun-Chin
authors.initials: HC
authors.lastname: Chao
authors.affiliation: Graduate Institute of Clinical Medical Sciences, Chang Gung University, College of Medicine, Taoyuan, Taiwan; Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Taoyuan, Taiwan.
authors.forename: Tzu-Hao
authors.initials: TH
authors.lastname: Wang
authors.affiliation: Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
authors.forename: Chih-Ping
authors.initials: CP
authors.lastname: Chen
authors.affiliation: Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Graduate Institute of Clinical Medical Sciences, Chang Gung University, College of Medicine, Taoyuan, Taiwan. Electronic address: mingweilai@gmail.com.
authors.forename: Ming-Wei
authors.initials: MW
authors.lastname: Lai
mesh_terms: D006801:Humans; D007231:Infant, Newborn; D007421:Intestine, Small; D008286:Malabsorption Syndromes / Q000209:etiology / Q000473:pathology* / Q000628:therapy; D008297:Male; D008871:Microvilli / Q000473:pathology*; D009081:Mucolipidoses / Q000209:etiology / Q000473:pathology* / Q000628:therapy; D009154:Mutation; D010288:Parenteral Nutrition
keywords: antenatal intestinal obstruction; diarrhea; dissection; microvillus inclusion disease (MVID)