Liver & Friends Flashcards
Arteries of the foregut
Celiac trunk
- Left gastric
- Splenic
- Common hepatic
What does ALT test show
Assoc with hepatocellular damage
e.g. paracetamol OD with hepatocellular necrosis, viral hepatitis, ischaemic necrosis, toxic hepatitis
AST:ALT ration
If over 1 = Ischaemia
If over 2.5 Alcoholic hepatitis
GGT
Sensitive to alcohol ingestion
ALP
Elevated with
- Cholestasis
- Malignant hepatocellular damage
- Marker of bone turnover (Paget’s)
Metabolic liver diseases:
Hereditary haemochromatosis (Deficiency of iron regulatory hormone hepcidin)
Wilson’s (accumulation of copper at tissues)
A1AT deficiency (Lungs and liver, enzyme not able to leave liver)
Hereditary haemochromatosis
- Inheritence
- Mechanism
- Organs affected
- Gene
Autosomal recessive
Inc intestinal absorption of iron leading to tissue accumulation. Hepcidin deficient (blocks iron absorption when high levels detected)
- Liver: fibrosis, cirrhosis, HCC,
- Heart
- Skin (bronzing)
- Joints (arthropathy)
- Pancreas (DM)
HFE (Chr 6)
Hereditary haemochromatosis
- Symptoms
- Age of onset
- TIBC
Early: fatigue, weakness, arthralgia, erectile dysfunction
Late: bronzing, diabetes, cirrhosis, arrhythmia, arthropathy
TIBC dec, Ferritin inc, Transferrin saturated (over 45%)
Hereditary haemochromatosis Investigations
Iron studies (high ferritin, Transferring over 45% saturated) HFE genetic testing LFTs MRI: iron overload Liver biopsy with Perls stain (blue)
Rule out Ddx: CRP (other cause of high ferritin - acute phase protein)
Treatment Hereditary haemochromatosis
Venesection/phlebotomy (4-500ml weekly)
Liver transplant in decompensation
Monitor ferritin
Wilson’s
- Hepatic features
- Psychiatric features
- Neuro features
- Opthalmological features
Liver failure, hepatitis,
Severe depression
Asymmetrical tremor, ataxia, clumsiness
Kayser-Fleisher ring
Wilson’s investigations
Copper studies:
- low serum caeruloplasmin
- high 24 hour urine copper
- high free copper
slit lamp: Keyser-Fleisher
Liver biopsy: copper
MRI: density in BG
Wilson’s Treatment
Chelation agents (Penicillamine) binds copper to excrete in urine
Stop copper absorption: Zinc
Avoid copper dense food: mushrooms, liver, chocolate, nuts
Monitor: LFTs, Renal functionalists, FBC
Avoid alcohol and hepatotoxics
A1At deficiency
- Inheritence
- Mechanism
- Consider when…
Autosomal recessive
A1AT is glycoprotein in the liver which controls inflammatory cascades and balances neutrophil elastase in the lung. Deficiency = alveolar destruction
Abnormal A1AT can not leave liver, congesting liver cells.
Young person with emphysema
A1At deficiency
- Hepatic features
- Lung features (Presenting factors)
Hepatitis, cirrhosis, HCC
Dyspnoea wheeze, cough, COPD
A1At deficiency
- Investigations
- Tx
Serum A1AT low
CXR and Lung functions (Peak flow and spirometry)
Smoking and alcohol advice
Treat like COPD (LABA)
Regular LFTs, screen for HCC
A1At deficiency
- Investigations
- Tx
Serum A1AT low
CXR and Lung functions (Peak flow and spirometry)
Smoking and alcohol advice
Treat like COPD (LABA)
Regular LFTs, screen for HCC
4 Things seen with Liver failure
Jaundice
Ascites
Abnormal Bleeding (dec clotting and varices)
Hepatic Encephalopathy
(when liver loses ability to regenerate)
Toxins causing Liver failure
Paracetamol,
Alcohol,
Medications (co-amoxiclav, Abx - cipro, doxy, erythro, methotrexate, gold)
Infective liver failure
Viral hepatitis (A, B, C, E) EBV, CMV
Neoplastic liver failure
Primary HCC
Secondary
Metabolic liver failure causes
Haemochromatosis
Wilson’s
A1ATd
Vascular Liver failure causes
Ischaemia (Atherosclerosis)
Budd-Chiari (hepatic vein thrombosis - triad 1) Abdo pain, 2) Ascites, 3) Hepatomegaly)
Inflammatory Liver failure
Autoimmune hepatitis