Hepatobilliary Flashcards
Historical Problems Associated w/ Hepatobilliary Dz
- vomiting
- Ds
- PU/PD
- stranguria/pollakiuria/hematuria
- icterus
- seizures or abnormal mentation
- abdominal distension / pain
- excessive salivation
- coagulopathy
- acholic stools
- anorexia / weight loss
- lethargy
- fever
Clinical Pathology Associated w/ Hepatobilliary Dz
- anemia
- target cells
- low BUN
- hypoalbuminemia
- hypoglycemia
- increased ALP, GGT, ALT
- hyperbilirubinemia
- isosthenuria
- hematuria
- bilirubinuria
- ammonium birate or bilirubin crystals
Diagnosing Hepatobilliary Dz
- abdominal rads
- abdominal ultrasound
- pre/post prandial bile acids
- coag panel
- liver fine needle aspirate or biopsy
- bile or liver culture
- abdominocentesis
Indications for Doing a Liver Biopsy or FNA
At least 2 lobes should be sampled
1) Unexplained, persistent increases in liver enzyme activities and/or abnormal hepatic function tests
2) determine cause of architectural abnormalities such as irregular contours, nodules or changes in echogenicity
3) stage neoplastic diseases (e.g. mast cell tumors in dogs, lymphoma)
4) assess response to therapy for previously diagnosed disorder
5) follow progression of previously diagnosed disease if not treated
Risks of a Liver Biopsy
bleeding
* try to do caog panel first
When to sample & culture
Bile
- when obtaining liver biopsy in cats or dogs
- cats that have ultrasonographic gallbladder abnormalities
- dogs w/ unexplained liver enzyme increases,
- maybe dogs w/ fever of unknown origin
Reasons for Pure Transudate abdominal effusion
- portal hypertension
- hypoalbuminemia <1
Antibiotics for bacterial hepatobiliary infection
- ampicillin/ penicillin G,
- cefazolin,
- enrofloxacin,
- amikacin/gentamicin,
- tetracycline/doxycycline
- metronidazole
Managing Liver Dz
- treat underlying cause
- low protein diet
- Lactulose (encephalopathy)
- antibiotics
- glucocorticoids to suppress inflammation
- H2 antagonists to reduce ulcers
- diruetics
- Ursodeoxycholic acid decreases viscocity of bile (don’t use in obstruction)
- Colchicine to inhibit fibrin formation
- Vit K
- Vit E
- SAMe
- Silymarin
Portosystemic Shunts; Clinical Signs
- Poor growth
- Mental dullness, seizures or other neurologic abnormalities
- Polyuria/polydipsia
- Pollakiuria/stranguria/hematuria (from cystic calculi)
- Poor anesthetic recovery
- copper irises (cats)
Portosystemic Shunts; Clin Path, Imaging
Clin Path
* Mild microcytic anemia
* Hypoalbuminemia
* Low BUN
* Low urine specific gravity
* urate crystals
* Normal or mildly increased AP and ALT
* increased in pre- and post-prandial bile acids
* Hyperbilirubinemia (acquired shunts)
Imaging
* Small liver on rads
* visible shunt on ultrasound
* visible shunt on Contrast venous portograms or contrast CT (best)
Portal Vein Hypoplasia; Clinical Signs, Diagnosis
Clinical Signs
* Poor growth
* Mental dullness, seizures or other neurologic abnormalities
* Polyuria/polydipsia
* Pollakiuria/stranguria/hematuria (from cystic calculi)
* Poor anesthetic recovery
* abdominal effusion w/ portal hypertension
Diagnosis
* liver biopsy to exclude other shunting dz
Hepatic Cirrhosis; Cause, Clin Path
Cause
* end stage of many liver diseases due to persistent inflammation
Clin Path
* hyperbilirubinemia
* signs of portosystemic shunt
Copper Storage Dz; Pathophysiology, Diagnosis, Treatment
Pathophysiology
* abnormal excretion of copper from hepatocytes into the biliary system
* association w/ Bedlington terriers, West Highland white terriers, Doberman and Labs
Diagnosis
* Copper found in abnormal amounts in liver biopsy
* test for mutations in COMMD1 gene
Treatment
* Zinc acetate to impair copper absorption
* Penicillamine or tetramine to help excrete Cu
Hepatic Neoplasia in Dogs; Common neoplasms, Diagnosis
- Primary - Carcinoma
- Metastatic - Hemangiosarcoma & lymphoma
Diagnosis
* FNA
* biopsy
Vacuolar Hepatopathy; What is it
non-specific cytologic/histologic diagnosis that suggests underlying systemic or liver disease
Hepatic Lipidosis; Pathophysiology, Clinical Signs
- obese cat quits eating for SOME reason (usually 2wks) ->
- accumulation of lipid in liver ->
- hepatobiliary dysfunction
Clinical SIgns
* anorexia / lethargy
* weight loss
* icterus
* vomiting
* coagulopathies
* hepatic encephalopathy
* hepatomegaly
* non-regenerative anemia
* increased ALT/ALP
* hyperbilirubinemia
* hypercholestrolemia
Hepatic Lipidosis; Diagnosis, Treatment
Diagnosis
* lipid vacuolation of hepatocytes on liver biopsies
* rule out underlying dz, such as cholangiohepatitis, pancreatitis, GI/other organ dz
Treatment
* high protein diet (unless encephalopathy)
* Vit K (coagulopathies)
* Vit E
* support
Inflammatory Liver Dz; Signalment, Clinical Signs, Diagnosis, Treatment
Cats
Clinical Signs
* Anorexia/weight loss/ lethargy
* Icterus
* Vomiting
* Fever (neutrophilic cholangitis)
* Increased ALT, ALP, GGT, bilirubin
* Hyperglobulinemia (lymphocytic cholangitis)
* Neutrophilic leukocytosis (neutrophilic cholangitis)
Diagnosis
* Histo
* bile cytology/culture
Treatment
* glucocorticoids (lymphocytic)
* antibiotics (neutrophilic)
Hepatic Neoplasia in Cats
- uncommon
Metastatic
* lymphoma,
* myeloproliferative,
* mast cell,
* hemangiosarcoma
Primary
* bile duct adenoma
* adenocarcinoma
Extrahepatic Bile Duct Obstruction; Causes, Clinical Signs, Diagnosis, Treatment
Causes
* tumors of pancreas, duodenum, bile duct
* choleliths
* stricture or edema
Signs
* icterus
* signs of underlying disorder
Diagnosis
* rads, ultrasound, CT of gallbladder & biliary
* surgery to look at gallbladder & biliary
Treatment
* surgery to remove obstruction
Cholecystitis; Pathophysiology, Clinical Signs
Pathophysiology
* Ascension of bacteria from GI
* E coli, Enterococcus, Bacteroides, Strep, Clostridium
* Bacterial cholecystitis -> common causes of gallbladder rupture
Clinical Signs
* abdominal pain
* fever
* vomiting
* icterus
* poor appetite
* may be abdominal effusion (gallbladder rupture)
* leukocytosis
* hyperbilirubinemia,
* increased ALT, AST, and ALP
Cholecystitis; Diagnosis, Treatment
Diagnosis
* gas in biliary tree on rads
* sludge & wall thickening on ultrasound (cats)
* (+) bile culture
* presence of bacteria on bile cytology
Treatment
* Antibiotics
* maybe surgery to establish patency of bile duct or remove gall bladder
Gallbladder mucocele; Signalment, Diagnosis, Treatment
Signalment
* shetland sheepdogs
* dogs w/ hyperadrenocorticism
Diagnosis
* incidental on ultrasound
* signs of gallbladder rupture
* signs of biliary obstruction
Treatment
* surgery
* may resolve w/ ursodial but takes a LONG time
Diseases in Cats that Can Present w/ Stomatitis/Glossitis
- Calicivirus & herpes
- FELV/FIV
- lymphocytic/plasmacytic stomatitis
- feline eosinophilic granuloma complex
- immune mediated dz
- severe peridontal dz
- physical trauma
Features that Differentiate Regurgitation from Vomiting
- absence of abdominal effort
- lack of prodromal signs of retching and nausea
- appearance of undigested food that may have tubular form
Esophagitis; Causes, Clinical Signs, Diagnosis, Treatment
Causes
* injury from gastric reflux or chronic vomiting
* foreign body
* ingestion of caustic substance
Signs
* clinically silent
* signs of stricture
Diagnosis
* lesions on esophagoscopy
Treatment
* proton-pump inhibitors (omeprazole)
* metoclopramide and cisapride to enhance the tone of the LES
* crushed sucralfate suspended in water?