Pathophysiology
KU Patophysiology learning cards
KU Patophysiology learning cards
Fichier Détails
Cartes-fiches | 501 |
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Langue | English |
Catégorie | Médecine |
Niveau | Université |
Crée / Actualisé | 30.08.2022 / 27.12.2023 |
Lien de web |
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What are the clinical manifestations of hepatitis?
Three phases:
Prodromal period: abrupt to slowly progressing with muscle, joint pain, fatigue and anorexia, vomitting diarhea (rise in bilirubin)
Icterus (jaundice=jellow skin) period: 7-14 days tenderness around liver, weight loss, swollen blood vessels 90% are asymptomatic
Recovery period: return of appetite, disappearance of jaundice, recovery in 1-4 months. Carrier state (no symptoms but can be transmitted) for certain versions possible
What is the etiology of alcoholic liver disease?
Age and gender. Women produce more toxic substances when metabolizing alcohol and are more prone. Genetic factors also play a role
What is the patophysiology of alcoholic liver disease? explain briefly
Alcohol is absorbed in GI tract (and stomach), 80-90% is metabolized in liver and metabolic products are responsible of alterations that cause liver injury.
Acetaldehyde has toxic effects on liver cells, it impairs mitochondria electron transport (ATP production), which leads to lipid synthesis and ketogenesis. Others attack certain membranes of the liver.
What are the three stages of alcoholic liver disease?
Fatty liver: accumulation of fat in liver cells, becomess yellow and enlarged. Depends on diet and amount of alcohol intake, reversible if stop drinking. no symptoms.
Alcoholic hepatitis: stage between fatty and cirrhosis. Often seen after abrupt alcohol intake. Inflammation of liver and necrosis. Pain, nausea, jaundice, liver failure caused by liver damage. Can be fatal
Alcoholic cirrhosis: end stage. Nodules form on surface and impaire liver function. Can compress veins, and circulationg blood which causes portal hypertension
What are the clinical manifestaions of alchoholic liver disease?
Abnormal accumulation of fat due to glucogenesis. Impaired liver function, and compression of liver veins. Enlarged liver
What is the etiology for cirrhosis?
Alchoholism, obesity, fatty liver disease, viral hepatitis, toxic reaction to drugs, bilary obstruction of metabolic disorders that cause deposition of mineralis in liver
What is the patophysiology of Cirrhosis?
End stage of cronic liver disease where functional tissue is replaced by fibrous tissue. Diffuse fibrosis and formation of nodules (3mm up to several cm large), that consticts the vascular channels and bilary duct system.
Balance between regeneration and construction activity lead to scarring
What are the clinical manifestations of cirrhoss?
Asymptomatic to liver failure. Symptoms show when advanced.
Weight loss, anorexia and weakness, diarrhea, enlarged liver and jaundice is common (bilirubin buildup). Abdominal pain due to liver stretching and enlargement. hypertension and liver cell failure lead to enlarged spleen, abdominal swelling due to fluid accumulation. Bleeding due to dicreased clothing factors. Enlargement of brests (men and women) and feminising pubic hair (testicular atrophy)
What is the etiology of Hepatobilia carcinoma and what is it ?
Most common primary liver tumor (HCC). Large problem in less developed regions due to hepatitis B,C,D, cirrhosis, long-term exposure to environmental agents or drinking conatminated water (arsenik)
What is the patophysiology of HCC?
Unclear how agents contribute to cancer. With viruses it could be that the DNA integrates ino the reproduction of cells causing cancer mutations
What are the clinical manifestations of Hepatobilia carinoma (HCC)?
Similar/same to cirrhosis or chronic hepatitis.
Weakness, anorexia, weight loss, fatigue, abdominal swelling and pain, jaundice, increased liver size,.... Can be more rapid progressive if cirrhosis already present (restoration of tissue impaired).
Hypoglycemia due to hormones produced by tumor, or hypocalcemia
What is cholangiocarcinoma?
Bile duct cancer. Quite rare.
Increased age or inflammatory bowel disease are risk factors
Presents with pain, weightloss, abdominal swelling, Jaundice if bile duct is obstructed
Which cancers are most common in the liver?
metastatic tumors!
Spred from brest, colon, lung or urogenital cancers.
What is Cholecystitis?
Diffuse inflammation of the gallbladder. Mostly associated with gallstones
What is the etiology of Cholecystitis?
Gallstones, sepsis, severe traume or infections can cause it. Either acute or chronic (repetitive episodes of inflammation)
What is th patophyiology of Cholecystitis?
Obstuction of cystic duct by gallstones leads to release of phospholipase from epithelium in gallbladder. This enzyme hydrolizes lecithin and releases a membrane-active toxin. Additionally disruption of protective mucous lining increases cell vulnerability (also due to concentrated bile salts)
What are the clinical manifestations of Cholecystitis?
Mild Fever, nausea, anorexia, vomitting (GI-trac is connected to vomitting center). Emotional factor can lead to loss of apetite.
Elevated WBC count, and slightly elevated bylirubin
Explain briefly Cholangitis
Cholangitis is an inflammation of the common duct which can form spontaneously. Symptoms are similar to those of gallstones
Choledocolithiasis=stones in common duct
What is the Etiology of pancreatitis
Acute: Reversible inflammatory process by premature activation of pancreatic enzymes. Due to Gallstones of alcohol abuse. Associated by hypercalcemia, hyperlipidemia, infections and trauma or drugs
Chronic: Progressive destruction by fibrosis (first exocrine then endocrine pancreas). irreversible. Long term alcohol abuse, long standing, chronic pancreatitis, inflammatory bowel disease or hereditary pancreatitis can be factors
What is the pathophysiology of acute Pancreatitis?
Inflammation of pancreas, or serum amylase/lypase much higher than normal.
Autodigestion of pancreatic tissue begins with activation of trypsin which activates digestive enzymes. Bilary tract obstruction (gallstones) or bilary reflux can activate enzymes in pancreatic duct system
(Chronic: progressive fibrotic destruction)
What are the clinical manifestations of acute panceatitis?
Mild to severe organ dysfunction. Abdominal pain.
Fever, tachycardia, hypotension, respiratory distrress, thirst, poor urine output,
Tachycardia can lead to hypoxemia, confusion, rising hematocrit levels
Can lead to necrosis and organ failure