Difference between revisions of "Pediatric gastrointestinal pathology"

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*Short-segment (75-80%): Rectum, distal sigmoid
*Short-segment (75-80%): Rectum, distal sigmoid
*Long-segment HD (10-20%): Beyond splenic flexure
*Long-segment HD (10-20%): Beyond splenic flexure
*Total colonic aganglionosis (5-15%): Entire colon
*Total colonic aganglionosis (5-15%): Entire colon. <ref name=pmid4223113{{Cite journal  | last1 = Fernando | first1 = SD. | title = Microscopic anatomy and histochemistry of glands in the external auditory meatus of the cat (Felis domesticus). | journal = Am J Vet Res | volume = 26 | issue = 114 | pages = 1157-62 | month = Sep | year = 1965 | doi =  | PMID = 4223113 }}
 
**[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4223113/figure/F0001/ Classification of Hirschsprung's disease according to the aganglionic segment length (https://www.ncbi.nlm.nih.gov)]
**[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4223113/figure/F0001/ Classification of Hirschsprung's disease according to the aganglionic segment length (https://www.ncbi.nlm.nih.gov)]


Revision as of 17:27, 19 August 2017

This article deals with pediatric gastrointestinal pathology. An introduction to pediatric pathology is in the pediatric pathology article.

An overview of (adult) gastrointestinal pathology is in the gastrointestinal pathology article.

Birth defects

Omphalocele

General

Usually genetic (unlike gastroschisis) - associated with:[1]

Presentation:

  • Increased AFP.

Gross

  • Bowel outside of abdomen - covered by membrane/in a sac.

Image:

Gastroschisis

General

  • Defect considered to be more severe than omphalocele.
  • Usually sporadic.

Gross

  • Bowel outside of abdomen - individual loops of bowel are seen.

Image:

Luminal pathology

Esophageal atresia

General

  • Multifactoral.
  • Often associated with other abnormalities.

Forms:[3]

  1. Esophageal atresia with distal tracheoesophageal fistula - most common.
  2. Esophageal atresia without a fistula.

Note:

  • The "H-type" tracheoeosphageal fistula is often lumped together with esophageal atresia.[3]

Image:

Abetalipoproteinemia

  • AKA Bassen-Kornzweig syndrome.

General

Clinical features:[6]

  • Failure to thrive.
  • Pigmented retinopathy.

Blood work:[6]

  • Cholesterol - low.
  • Triglyceride - low.
  • Apolipoprotein B - very low.

Microscopic

Features:

  • Enterocytes have clear cytoplasm (due to lipid accumulation).

Notes:

  • Have abnormal erythrocytes with a spiculated cell membranes acanthocyte - seen on blood films.

Images

  • Abetalipoproteinemia - intermed. mag. (WC)

  • Abetalipoproteinemia - very high mag. (WC)

Microvillous inclusion disease

  • AKA Davidson disease.

General

  • Autosomal recessive inherited condition - due to mutation in MYO5B.[7]

Microscopic

Features:

  • Flat mucosa; no villi.

Notes:

  • Appearance similar to celiac sprue; however, usually lacks the intraepithelial lymphocytic infiltration characteristic of celiac sprue.

Images:

IHC

EM

Images:

Cystic fibrosis

Main article: Cystic fibrosis

General

Microscopic

Features - large bowel:[10]

  • Crypt enlargement.

Notes:

  • Not intracellular and extracellular accumulation of mucus. (?)

Colonic aganglionosis

  • AKA Hirschsprung disease.

General

  • Genetic disorder:[11]
    • 5-10% familial; RET gene most commonly mutated.
    • Several genes involved.
    • Inheritance pattern variable.
  • Treatment: surgery (Swenson's procedure or Duhamel procedure).[12]

Pathology:

  • Failure of neural crest cell migration
    • Parasympathetic ganglion cells in submucosal plexus (Meissner plexus) and myenteric plexus (Auerbach plexus) - absent.[13]

Notes:

  • Most common reason for litigation in paediatric pathology.[14]

Gross

Features:

  • Dilated bowel; stuffed sausage-look.

Classification:

  • Short-segment (75-80%): Rectum, distal sigmoid
  • Long-segment HD (10-20%): Beyond splenic flexure
  • Total colonic aganglionosis (5-15%): Entire colon. Cite error: Invalid <ref> tag; invalid names, e.g. too many

Stains

  • Acetylcholinesterase - marks the abundant, disorganized, nerve fibers.

Image:

IHC

Features:[15]

  • NF-M (neurofilament middle) - highlight hypertrophic nerve fascicules
  • NF-H (neurofilament high) - highlight hypertrophic nerve fascicules.
  • Tau ~ highlights ganglion cells (which are absent in segments affected by Hirschsprung).[16]
    • Nerve fibres +ve control.

Others:[15]

  • NSE ~ normal.
  • S100 ~ normal.

Meconium ileus

General

Gross

Features:

  • Thick.
    • High viscosity.
  • Green.

Image

Microscopic

Features:

  • Meconium-laden macrophages. (???)

Meconium peritonitis

General

Microscopic

Features:

  • Brown granular material - key feature.
  • +/-Multinucleated giant cells.
  • Inflammatory infiltrate (PMNs, lymphocytes, plasma cells).

Image:

Necrotizing enterocolitis

  • Abbreviated NEC.

General

  • Disease primarily of premature babies.
  • Diagnosed by imaging.

Note:

  • Enterocolitis = inflammation of small bowel and colon.[19]
    • Necrotizing enteritis = small bowel only.

Microscopic

Features:

  • Large spaces.

DDx:

Images:

Autoimmune enteropathy

Main article: Autoimmune enteropathy

Pancreas

Main article: Pancreas

Pancreatic islet cell hyperplasia

General

Microscopic

Features:

  • Marked size variation of pancreatic islets.
    • Normal islets ~ 150 micrometers (diameter). Hyperplastic islets - up to ~500 micrometers (diameter).

Image:

Liver

Main article: Liver pathology

Giant cell hepatitis

  • AKA neonatal giant cell hepatitis, abbreviated NGCH.

General

  • Rare.

Etiology:

  • Unknown - possibly viral, autoimmune and/or drugs.[21]
  • One large series suggests that, in the neonatal population, with follow-up the causes are:
    • ~49% idiopathic.
    • ~16% pan-hypopituitarism.
    • ~8% biliary atresia.
    • ~6% Alagille syndrome
    • ~6% bile salt defects.

Notes:

Microscopic

Features:[24]

  • Giant hepatocytes with multiple nuclei - key feature.
    • Typically ~35% of hepatocytes affected.
  • Minimal or absent inflammation portal and lobular inflammation.
  • Lobular cholestasis.

Images

Biliary atresia

General

  • 1/3 of neonatal cholestasis.[25]
  • Etiology - various.
    • Viral - possibly rotavirus.[26]
    • Genetic/syndromic - several.[27]

Microscopic

Features:[25]

  • Bile duct proliferation.
  • Portal tract edema.
  • Portal tract fibrosis.

Image:

See also

References

  1. ↑ Frolov, P.; Alali, J.; Klein, MD. (Dec 2010). "Clinical risk factors for gastroschisis and omphalocele in humans: a review of the literature.". Pediatr Surg Int 26 (12): 1135-48. doi:10.1007/s00383-010-2701-7. PMID 20809116.
  2. ↑ Moore, CA.; Harmon, JP.; Padilla, LM.; Castro, VB.; Weaver, DD. (Aug 1988). "Neural tube defects and omphalocele in trisomy 18.". Clin Genet 34 (2): 98-103. PMID 3191615.
  3. ↑ 3.0 3.1 Spitz, L. (2007). "Oesophageal atresia.". Orphanet J Rare Dis 2: 24. doi:10.1186/1750-1172-2-24. PMID 17498283.
  4. ↑ URL: http://www.ncbi.nlm.nih.gov/omim/200100. Accessed on: 6 April 2011.
  5. ↑ Bassen FA, Kornzweig AL (April 1950). "Malformation of the erythrocytes in a case of atypical retinitis pigmentosa". Blood 5 (4): 381–87. PMID 15411425.
  6. ↑ 6.0 6.1 Hammer, MB.; El Euch-Fayache, G.; Nehdi, H.; Feki, M.; Maamouri-Hicheri, W.; Hentati, F.; Amouri, R. (Feb 2014). "Clinical features and molecular genetics of two Tunisian families with abetalipoproteinemia.". J Clin Neurosci 21 (2): 311-5. doi:10.1016/j.jocn.2013.04.016. PMID 24139731.
  7. ↑ Müller T, Hess MW, Schiefermeier N, et al. (October 2008). "MYO5B mutations cause microvillus inclusion disease and disrupt epithelial cell polarity". Nat. Genet. 40 (10): 1163–5. doi:10.1038/ng.225. PMID 18724368.
  8. ↑ Mills, Stacey E; Carter, Darryl; Greenson, Joel K; Oberman, Harold A; Reuter, Victor E (2004). Sternberg's Diagnostic Surgical Pathology (4th ed.). Lippincott Williams & Wilkins. ISBN 978-0781740517.
  9. ↑ Kennea N, Norbury R, Anderson G, Tekay A (2001). "Congenital microvillous inclusion disease presenting as antenatal bowel obstruction". Ultrasound Obstet Gynecol 17 (2): 172–4. doi:10.1046/j.1469-0705.2001.00211.x. PMID 11251929.
  10. ↑ Neutra MR, Trier JS (October 1978). "Rectal mucosa in cystic fibrosis. Morphological features before and after short term organ culture". Gastroenterology 75 (4): 701–10. PMID 710839.
  11. ↑ Online 'Mendelian Inheritance in Man' (OMIM) 142623
  12. ↑ Okasora, T.; Okamoto, E.; Kuwata, K.; Toyosaka, A.; Ohashi, S.; Ueki, S. (Oct 1983). "Serum and erythrocyte acetylcholine esterase in Hirschsprung's disease.". Z Kinderchir 38 (5): 298-300. doi:10.1055/s-2008-1059992. PMID 6649901.
  13. ↑ Vorobyov, GI.; Achkasov, SI.; Biryukov, OM. (2006). "Hirschsprung's disease in adults.". Acta Chir Iugosl 53 (2): 113-6. PMID 17139897.
  14. ↑ Taylor, G. 19 January 2011.
  15. ↑ 15.0 15.1 Luider, TM.; van Dommelen, MW.; Tibboel, D.; Meijers, JH.; Ten Kate, FJ.; Trojanowski, JQ.; Molenaar, JC. (Jul 1992). "Differences in phosphorylation state of neurofilament proteins in ganglionic and aganglionic bowel segments of children with Hirschsprung's disease.". J Pediatr Surg 27 (7): 815-9. PMID 1640323.
  16. ↑ Deguchi, E.; Iwai, N.; Goto, Y.; Yanagihara, J.; Fushiki, S. (Jul 1993). "An immunohistochemical study of neurofilament and microtubule-associated Tau protein in the enteric innervation in Hirschsprung's disease.". J Pediatr Surg 28 (7): 886-90. PMID 8229560.
  17. ↑ Déchelotte PJ, Mulliez NM, Bouvier RJ, Vanlieféringhen PC, Lémery DJ (1992). "Pseudo-meconium ileus due to cytomegalovirus infection: a report of three cases". Pediatr Pathol 12 (1): 73–82. PMID 1313975.
  18. ↑ URL: http://library.med.utah.edu/WebPath/EXAM/IMGQUIZ/pdfrm.html. Accessed on: 3 December 2011.
  19. ↑ URL: http://medical-dictionary.thefreedictionary.com/enterocolitis. Accessed on: 10 October 2011.
  20. ↑ URL: http://cueflash.com/decks/Pathology_Pediatrics. Accessed on: 11 January 2011.
  21. ↑ Hartl, J.; Buettner, R.; Rockmann, F.; Farkas, S.; Holstege, A.; Vogel, C.; Schnitzbauer, A.; Schlitt, HJ. et al. (Nov 2010). "Giant cell hepatitis: an unusual cause of fulminant liver failure.". Z Gastroenterol 48 (11): 1293-6. doi:10.1055/s-0029-1245476. PMID 21043007.
  22. ↑ Hayashi, H.; Narita, R.; Hiura, M.; Abe, S.; Tabaru, A.; Tanimoto, A.; Sasaguri, Y.; Harada, M. (2011). "A case of adult autoimmune hepatitis with histological features of giant cell hepatitis.". Intern Med 50 (4): 315-9. PMID 21325763.
  23. ↑ Guddat, SS.; Ehrlich, E.; Martin, H.; Tsokos, M. (Sep 2011). "Fatal spontaneous subdural bleeding due to neonatal giant cell hepatitis: a rare differential diagnosis of shaken baby syndrome.". Forensic Sci Med Pathol 7 (3): 294-7. doi:10.1007/s12024-011-9227-8. PMID 21331818.
  24. ↑ Torbenson, M.; Hart, J.; Westerhoff, M.; Azzam, RK.; Elgendi, A.; Mziray-Andrew, HC.; Kim, GE.; Scheimann, A. (Oct 2010). "Neonatal giant cell hepatitis: histological and etiological findings.". Am J Surg Pathol 34 (10): 1498-503. doi:10.1097/PAS.0b013e3181f069ab. PMID 20871223.
  25. ↑ 25.0 25.1 Mitchell, Richard; Kumar, Vinay; Fausto, Nelson; Abbas, Abul K.; Aster, Jon (2011). Pocket Companion to Robbins & Cotran Pathologic Basis of Disease (8th ed.). Elsevier Saunders. pp. 464. ISBN 978-1416054542.
  26. ↑ Hertel, PM.; Estes, MK. (Jan 2012). "Rotavirus and biliary atresia: can causation be proven?". Curr Opin Gastroenterol 28 (1): 10-7. doi:10.1097/MOG.0b013e32834c7ae4. PMID 22123643.
  27. ↑ Santos, JL.; Choquette, M.; Bezerra, JA. (Feb 2010). "Cholestatic liver disease in children.". Curr Gastroenterol Rep 12 (1): 30-9. doi:10.1007/s11894-009-0081-8. PMID 20425482.
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