Abstract:
:Enteroendocrine cell dysgenesis was observed in 3 patients with intestinal failure of unknown cause. Enteroendocrine cell dysgenesis is a congenitally acquired life-threatening malabsorptive condition with a unique clinical phenotype paired with a histologically identifiable disease pattern. Two cases were first presented at the Ninth International Small Bowel Transplantation Symposium, Brussels 2005, and were subsequently published (N Engl J Med 2006;355:270). We now present the histopathologic and immunohistochemical findings of the gastric antrum, small bowel, and colon in greater detail. The clinical phenotype of the patients was unusual in that the affected patients demonstrated profound malabsorption of all nutrients, except water, from birth. The small intestine in each patient demonstrated almost no abnormality, except a near absence of endocrine cells in the mucosa. The colon appeared similarly affected. Known causes of congenital malabsorption, inflammatory, and infectious causes of diarrhea were excluded. The defect is secondary to point mutations in NEUROG3, which result in an arrest of endocrine cell development in the small intestine and colon. This work describes the pathologic characterization of enteroendocrine cell dysgenesis using routine techniques. The pattern of injury is distinct from other histopathologically assessed congenital malabsorptive conditions such as microvillus inclusion disease, tufting enteropathy, and abetalipoproteinemia. It is also easily distinguished from inflammatory conditions such as food allergy, gluten-sensitive enteropathy, autoimmune enteropathy, IPEX (immune dysfunction, polyendocrinopathy, enteropathy, and X-linked inheritance), and inflammatory bowel disease. The histopathology of disease is similar to what has been found transiently in a single patient with autoimmune polyglandular syndrome type I.
journal_name
Hum Patholjournal_title
Human pathologyauthors
Cortina G,Smart CN,Farmer DG,Bhuta S,Treem WR,Hill ID,Martín MGdoi
10.1016/j.humpath.2006.10.014subject
Has Abstractpub_date
2007-04-01 00:00:00pages
570-80issue
4eissn
0046-8177issn
1532-8392pii
S0046-8177(06)00622-8journal_volume
38pub_type
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