Metabolic Diseases Flashcards
A metabolic disease is an abnormality that occurs
Globally in the body
A metabolic disease affects ____ and is dependant on
Several organs
The stage of the disease
What makes the underlying cause of a metabolic numerous
Many substances metabolized in the body
What are the different metabolic diseases of the liver
Hepatocellular disease
Glycogen storage disease
What are the different types of hepatocellular disease
Fatty infiltration
Cirrhosis
What is hepatocellular disease
A diffuse process what is caused by the dysfunction of hepatocytes
What is normal liver tissue replaced with in hepatocellular disease
Fat or fibrosis
Hepatocellular disease ranges from
Simple fatty changes to cirrhosis
What does hepatocellular disease often result in
Abnormal LFT’s
Hepatocellular disease often affects the
Liver size
What is Fatty infiltration
Steatosis
Define steatosis
Accumulation of triglycerides within hepatocytes
Is fatty infiltration uniform throughout the liver
No, not always
Fatty infiltration can be what kind of processes
Focal or diffuse
Fatty infiltration is
Acquired and reversible
What are the 2 most common causes of fatty infiltration
Alcohol abuse
Obesity
Fatty infiltration is the precursor to
Significant chronic disease
What is assessed when evaluating the liver for fatty infiltration
Echogenicity changes
Echotexture changes
Attenuation characteristics
Ability to visualize vessels
What is imperative when assessing for fatty infiltration
Appropriate gains, TGC’s and focus
What is the sonographic characteristics for mild fatty infiltration
Slight increase in liver echogencity
Diaphragm and vessels clearly defined
What is the sonographic characteristics for moderate fatty infiltration
Increase in liver echogencity
Vessels and diagram not sharply defined
What is the sonographic characteristics for severe fatty infiltration
Liver echogencity is markedly increased
Extremely difficult to define diaphragm and vessel walls
What are the different types of focal fatty changes
Infiltration
Sparing
What is the sonographic characteristics of infiltration
Focal areas of increased echogencity (fatty deposits)
Mostly normal liver parenchyma
What is the sonographic characteristics of sparing
Focal hyperechoic areas (normal liver tissue)
Majority if liver parenchyma has fatty infiltration
What lab values could potentially be elevated with fatty infiltration
ALT
AST
BBT is associated with alcohol abuse
What is cirrhosis
A diffuse process that destroys the liver cells
What does cirrhosis result in
Fibrosis of the liver parenchyma with nodular changes
What are the underlying causes for cirrhosis
Alcohol abuse
Chronic viral hepatitis
Primary sclerosing cholangitis
What is the progressive change of cirrhosis
Cell death
Fibrosis
Regeneration
Is cirrhosis reversible
No
What are the 2 types of nodular changes with cirrhosis
Micro nodular
Marco nodular
What is mirco nodular changes in cirrhosis caused by
Alcohol consumption
What is macro nodular changes in cirrhosis caused by
Chronic viral hepatitis
What does the acute stage of cirrhosis look like
Some appearance of severe fatty infiltration
Enlarged liver
Textural changes
What does the chronic stage of cirrhosis look like
Small liver (CL/RL >0.65)
Course echotexture
Nodular surface
Paucity of vessels
What is quite common with liver cirrhosis
Ascites
Cirrhosis has the potential to progress to what
End stage liver failure
What do the lab values for cirrhosis depend on
The stage of the disease
What are the increased lab values for cirrhosis
AST ALT LDH ALK PHOS (ALP) Bilirubin (conjugated) Gamma globulins (BBT)
What lab value is decreased with liver cirrhosis
Serum albumin
Which other organ is affected by liver cirrhosis and why
Spleen and because of portal hypertension
What is the classic clinical presentation of liver cirrhosis
Hepatomegaly
Jaundice
Ascites
What are the other clinical presentations for liver cirrhosis
Diarrhea
Feeling of fullness
Weight loss
What is glycogen storage disease
Autosomal recessive disorder
What is another name for glycogen storage disease
Von Gierke’s disease
Glycogen storage disease is cause by what
An enzyme deficiency (G6P) which leads to excess glycogen deposits in hepatocytes
What is the most common disease of the gallbladder
Cholelithiasis
What are the factors affecting gallstone formation
Abnormal bile composition
Stasis of bile
Infection
What is the compulsion of gallstones
Cholesterol
Bilirubin
Calcium
What is the most common composition of gallstones
Cholesterol
What is the stone called when it is composed of bilirubin
Pigment stone
What are the risk factors for cholelithiasis
Female Fat Fertile Forty Family history
What is the clinical presentation of cholelithiasis
Can be asymptomatic
RUQ pain (after meals)
Nausea and vomiting
Belching
If a patient is found to have cholelithiasis and has RUQ pain how does the pain radiate
Towards the back
What is the sonographic appearance of cholelithiasis
Echogenic focus Posterior shadowing Mobility May float in the bile WES sign
If a cholelithiasis stone is <5mm what may it not have
A shadow
When is the WES sign seen
When the gallbladder is filled with multiple stones or one large stone
What does WES stand for
Wall
Echo
Shadow
What lab values will be altered with cholelithiasis
ASTT
ALT
ALP
Bilirubin
What are the complications of gallstones
Biliary colic Obstruction of the cystic duct or CBD Bacterial infection Cholecystitis Ascending cholangitis
What is the most common complication of gallstones and what does it cause
Biliary colic; causes severe pain
What does the obstruction of the cystic duct or CBD lead to
GB hydrops
An US examination to investigate possible obstruction of the biliary tree tree should focus on which 3 questions
- Is the bile duct or GB dilated
- If yes, to what level
- If yes, what is the cause
What are the 2 different types of biliary tree obstruction
Biliary dilation
Choledocholiathiasis
Biliary dilation can be
Intra-hepatic or extra-hepatic
Mild, moderate or severe
What causes the ducts to dilate
Obstruction
Loss of duct elasticity
Ampulla of vaster dysfunction
What is the most common cause of duct dilation
Obstruction
What is the typical cause of biliary obstruction
Stone
Tumor
What is the clinical presentation of obstruction
Painless jaundice
Painful jaundice
What causes painless jaundice
Neoplastic conditions
Choledochal cysts
When is painful jaundice seen
With acute obstruction (stones)
And/Or
Infection of the biliary tree
What are the signs and symptoms of obstruction
Jaundice Clay coloured stool Abnormal LFT’s Pain Nausea
Can choledocholiathiasis be intrahepatic or extrahepatic
Yes
What is choledocholiathiasis
Stones in the biliary tree
Are there primary and secondary causes of choledocholiathiasis
Yes
What is the secondary cause of choledocholiathiasis
Stones that pass from the gallbladder to ducts
What is the primary cause of choledocholiathiasis
Stones that form in the ducts
What is the most common cause of choledocholiathiasis
Secondary
What causes the primary cause of choledocholiathiasis
Inflammation
Infection
Caroli’s disease
Prior surgery
What kind of infection will lead to the primary cause of choledocholiathiasis
Parasitic
What is the most common location for stones in the biliary tree
Distal CBD at the ampulla of Vater
when does glycogen storage disease begin
neonatally
what is associated with glycogen storage disease
begin adenomas
HCC
how is glycogen storage disease managed
through controlled and monitored diet
what is the sonographic appearance of glycogen storage disease
presents as diffuse fatty infiltration
adenomas
what is the metabolic disease that affects the peritoneum
ascites
define ascites
accumulation of free serous fluid in the peritoneal cavity
what are the 2 different types of ascites fluid
transudate
exudate
what does transudate fluid contain
little protein or cells
what does transudate fluid suggest
a non-inflammatory process
what kind of non-inflammatory processes does transudate fluid typically indicate
cirrhosis
CHF
why does cirrhosis cause transudate fluid to be leaked
because pressures in the liver increases which causes fluid to leak out of the hepatocytes
or
hypoalbuminemia
what is the sonographic appearance of transudate fluid
anechoic fluid
what does exudate fluid contain
high protein
blood (hemoperitoneum)
pus
chylous
define chylous
milky fluid with a high fat content
where is chyous from
lympathic system
what does exudate fluid suggest
an inflammatory or malignant cause
what is the sonographic appearance of exudate fluid
internal echoes
echogenic
loculations
what are the 2 different ways fluid in the perioneal cavty can present
free
loculated
how does free fluid in the perioteum change
with patient position
does free fluid in the perioteum confrom to the surrounding organs
yes, with acute angles with organ contact
how does loculated fluid in the peritoeum change with movement
it doesn’t
what is the appearance of loculated fluid in the peritoneum
rounded margins mass effect (walled off)
what are the 3 most dependant spaces in the perioneal cavity
morrison’s pouch
pouch of douglas
paragolic gutter