Duodenal atresia classification

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Hamid Qazi, MD, BSc [2]

Overview

Intestinal atresia, including duodenal atresia, may be classified into four subtypes: Type I, Type II, Type III, and Type IV. Type I is the most common subtype which involves the complete mucosal membrane, with muscularis and serosa remaining intact.

Classification

Intestinal atresia may be classified into several subtypes based on the location of the intestinal atresia:^[1]^[2]
- Duodenum
  - Type I
    - Involves complete mucosal membrane or diaphragm
    - Muscularis and serosa remaining intact
    - No discontinuation of the bowel
  - Type II
    - Fibrous cord connects two discontinued sections of bowel
  - Type III
    - No fibrous cord connecting the proximal and distal duodenum
  - Type IV
    - Several absent areas of bowel
    - String of sausage appearance
- Jejunum
- Ileum

Intestinal atresia according
to the origin of the abnormality

Duodenum

Jejunum

Ileum

•Type I
•Type II
•Type III
•Type IV

References

↑ Morris, Grant; Kennedy, Alfred; Cochran, William (2016). “Small Bowel Congenital Anomalies: a Review and Update”. Current Gastroenterology Reports. 18 (4). doi:10.1007/s11894-016-0490-4. ISSN 1522-8037.
↑ Kao KJ, Fleischer R, Bradford WD, Woodard BH (1983). “Multiple congenital septal atresias of the intestine: histomorphologic and pathogenetic implications”. Pediatr Pathol. 1 (4): 443–8. PMID 6687294.

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[MorrisKennedy2016-1] Morris, Grant; Kennedy, Alfred; Cochran, William (2016). “Small Bowel Congenital Anomalies: a Review and Update”. Current Gastroenterology Reports. 18 (4). doi:10.1007/s11894-016-0490-4. ISSN 1522-8037.

[pmid6687294-2] Kao KJ, Fleischer R, Bradford WD, Woodard BH (1983). “Multiple congenital septal atresias of the intestine: histomorphologic and pathogenetic implications”. Pediatr Pathol. 1 (4): 443–8. PMID 6687294.

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