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Samenvatting pathologie Roskams

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Samenvatting van de lessen van histopathologie van lever, galwegen en pancreas door prof. Roskams.

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Samenvatting Roskams
Steatohepatitis, metabole aandoeningen
Milde lobulaire hepatitis:
- Ballooning
- Apoptose
- Inflammatoir infiltraat: lymfocyten

Ernstige hepatitis
- Portale – centrale necrose = bridging necrose

Postnecrotische collaps: multipele portale-centrale shunts

Interfasehepatitis = basisletsel van chroniciteit + oorzaak periportale fibrose
- Onduidelijkheid aan rand portaveld

Viraal:
- HAV
- HBV:
o Ground glass hepatocyten
o ‘sanded’ nuclei
o Surinfectie met delta mogelijk
- HCV:
o Lymphoide follikels
o Steatose
o Lobulaire hepatitis: apoptotische lichaampjes, inflammatie
o Teken van chroniciteit: interfase hepatitis
- Delta, E, F
- CMV, adenovirus, EBV,…

Toxisch/xenobiotisch
- Inductie
- Centrolobulaire scherp afbegrensde necrose
- Clusters van ceroid macrofagen in centrolobulaire zones
- Eosinofiele polynucleaire leukocyten
- bilirubinostase

Autoimmuun:
- Plasmacellen  antistofproductie
- Biliaire destructie mogelijk = auto-immuuncholangitis
- Mixed vormen van destructie hepatocyten/cholangiocyten

(non)alcholische fatty liver disease (NAFLD)
- Steatosis: vetdepositie in hepatocyten micro- medio - macrovesicular
- Steatohepatitis: (N)ASH steatosis + inflamm met polymorphs,
lymphocytes, Mallory-Denk bodies
• NASH: more randomly distributed fat, glycogenated nuclei
• Mallory bodies zijn veel fijn korreliger: zonder kleuring moeilijk
zichtbaar
• Ubiquitine kleuring

, • ASH: centrolobular steatosis (toxic substance) satellitosis,
megamitochondria
• Satellitosis = Mallory bodies omgeven door polynucleairen
• Acute-on-chronisch: eind stadium cirrotische ASH
• Ductulaire bilirubinostase: bili knopjes in distale takjes
van ductuli
- Fibrosis: pericellular, perisinusoidal type: ‘chicken wire’ fibrosis
• Sirius rood kleuring: collagen = rood
• Capillarisatie van sinusoiden
• Micronodulaire cirrose = eindstadium van doorgedreven
perisinusoidale fibrose
• Phlebosclerose van portale/centrale vene: trombose vorming

Metabole syndromen
Ijzerdepositie
- Alcohol: some periportal deposition in hepatocytes
- Hereditary Haemochromatosis:
o Mostly point mutation in 282Y gene
o In hepatocytes met ↓ gradient from periportal naar centrolobular
o In endothelial cells, fibroblasts, macrophages, cholangiocytes
- Secondary iron deposition: iron in macrophages

Alfa-1-antitrypsine deficientie
- Aberrant iso-enzyme can not be secreted from hepatocyte and
accumulates
- PAS-diastase: PAS positive globules (paars)
- Specific immunohistochemical staining for mutated form
o Antistof voor Z-mutant van alfa-1-antitrypsine (bruin)
- Progression of any other chonic liver disease goes faster
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