Idiopathic Neonatal Hepatitis

Neonatal direct hyperbilirubinemia
defined as prolonged elevation of serum levels of conjugated bilirubin in
neonatal period but usually beyond the 1st 14 days of life.
That caused by defect in bile formation and excretion due to hepatocyte
dysfunction or From obstruction to the flow of bile through the intrahepatic and
extrahepatic biliary tree
leading to accumulation of conjugated bilirubin, bile acids, and cholesterol in
blood and extrahepatic tissues .
so there will be retention of bilirubin & bile acid causing malabsorption of fat
& fat soluble vit (A,K,D.E ) , xanthemas ( accumulation of cholesterol ), itching
also develop due to accumulation of bile acid .
associated with dark color urin (usually +ve for bilirubin ) & acholic stool .
We regard the case as direct hyperbilirubinemia when the direct B. is > 20%
of total bilirubin . It is not neurotoxic but it indicate serious disease
Causes of neonatal Direct hyperbilirubinaemia (Cholestasis )
Intrahepatic disease
1 – Hepatocyte injury
Idiopathic Neonatal Hepatitis
Metabolic cause
2 – Intrahepatic billiary dis or flow obst
Extrahepatic bile flow obst.
( neonatal cholestasis )
bile duct
paucity or
biliary atresia
& disease
Intrahepatic disease
Idiopathic Neonatal Hepatitis : which is the most common cause
if patient
not taking TPN
Infection : - Bacterial Sepsis , UTI . Viral Infections
,Varicella Zoster ,Coxacki , Hepatitis. TB , Syphilis .
Metabolic cause
as alpha1Antitrypsin deficiency , Tyrosinaemia
Galactossaemia Fructossaemia , Wolman disease , Nieman pig ,
Glycogen storage disease , Zellweger (cerebro -hepato-renal syndrome ) .
Toxic : - Total Parenteral Nutrition , most common cause in neonatal
care unit .Sepsis with endotoxaemia , Drug related .
Miscellanouse : Hypopituitarism , Hypothyroidism , Cystic Fibrosis
intrahepatic billiary hypoplasia or paucity as Algile synd,
Caroli disease ,
autosomal dominant polycystic liver disease (cysts in liver only) ,
autosomal recessive polycystic kidney disease (cysts in liver and kidney )
Intrahepatic cholestasis due to Disorders of membrane transport and
secretion of bile acid as Progressive familial intrahepatic cholestasis
(formerly known as Byler disease)
Defective bile acid biosynthesis
Extrahepatic bile flow obst.
Biliary atresia ,
Choledochal cysts ,
Neonatal sclerosing cholangitis ,
Spontaneous perforation of common bile duct,
Congenital hepatic fibrosis ,
Bile duct stenosis ,
Inspissated bile/mucous plug ,
Cholelithiasis ,
Tumors/masses (intrinsic and extrinsic)
Clinical presentation
Clinically the jaundice of direct hyperB. is usually greenish yellowish in
contrast to jaundice of indirect hyperB. which is usually orang-yellowish in
colour .
also it is associated with dark color urin (usually +ve for bilirubin ) & light or
acholic stool .
Some time patient may complain itching because of accumulation of bile acid
& salt
Also it may be associated with hepatosplenomegally with signs of chronic
liver disease , bleeding , varices of portal hypertension , xanthemas , or
associated with hepatic encephalopathy , ascites ,
signs of fat soluble vitamin deficiency due to retension of bile salts as Rickets (
D ) , neuromuscular disorder ( E ) , bleeding ( K ) , xerophthalmia ( A ) .
coarse features of trisomy 21 & Zellweger , Algille
Cataract , microcephally , Hx of infection in pregnancy as congenital infection
hypotonia , CNS manifestation in metabolic ,storage disease.
hypoglycemia , vomiting , lethargy , signs of
metabolic disease ,
carbohydrate intolerance , galactosaemia fructossaemia
Hx of neonatal death suggest metabolic dis or infection
delay passage of meconium may suggest cystic fibrosis .
Malnutrition resulting from malabsorption of dietary long-chain triglycerides
Fat-soluble vitamin malabsorption:
Vitamin A deficiency (night blindness, thick skin)
Vitamin E deficiency (neuromuscular degeneration)
Vitamin D deficiency (metabolic bone disease)
Vitamin K deficiency (hypoprothrombinemia)
Micronutrient deficiency , Deficiency of water-soluble vitamins
Retention of biliary constituents such as bile acid , cholesterol causing itch
or xanthomas
Progressive liver disease and biliary cirrhosis; portal hypertension (variceal
bleeding, ascites, hypersplenism)
End-stage liver disease (liver failure)
Lab. Investigation of patient with direct
liver function test and Complete blood count
Radiological examination
Specific test for Dx cause
liver function test
TSB with direct & indirect , direct should be more than 2mg / dL or more than
20 % of total .
Liver enz. ( ALT ) SGPT (liver specific )S. Glutamic Pyruvic Transaminase ,
( AST ) SGOT ; S.Glutamic Oxaloacetic acid Transaminase . increase these enz.
indicate hepatocellular damage , the increase more marked in acute hepatic
dis. than chr. liver dis. & intra or extra biliary obstruction .
test for synthetic function that include (S. Albumin ) hypoalbuminaemia
indicate severe liver dis. also ( PT & PTT ) , prolonged PT & PTT because of
deficiency of vit. K dependant factor ( 1972 ) & other coagulation factor . It
may indicate severe liver dis. Or fulminant hepatic failure .
test for excretory function which include Alk. Phosphatase ( not specific to
liver , also in bone) , also 5 nucleotidase , gamma glutamyl transpeptidase .
They increase when there is defect in bile excretion as in biliary dis. or in
hepatocellular dis.
Cholesterol , increase in cholestasis & decrease in acute liver dis. as hepatitis
serum ammonia, , serum glucose .
Complete blood count, including platelet count
Specific test for Dx cause
Blood , urine & CSF analysis & culture for bact. , virus as HIV , Herpes , CMV .
Serological exam. For TORCH , VDRL for syphilis
Urine for B. , glucose , reducing substance as galactose , Red blood cell
galactose-1-phosphate uridyl transferase.
Paracentesis for ascites (examine for bile and infection)
Serum & urine chromatography for a.a. dis.
Thyroxine , TSH .
Sweat test for cystic fibrosis
analysis for alpha 1 anti trypsin deficiency .
Bone marrow examination and skin fibroblast culture for suspected storage
Genetic testing for Alagille syndrome, three forms of PFIC, other
Ultrasound U / S
 size of liver ,texture , echogencity ( increase echogenicity in fatty liver ) , mass,
stone , choledocal cyst , gall bladder size , biliary tract , ascitic fluid , portal
hypertension , patency of portal vein , presence of collatral . presence of other
anomalies specially renal .
 Findings in infants with biliary atresia include an atretic gallbladder and a thin,
indistinct gallbladder wall with an irregular or lobulated contour , An absent
common bile duct , dilatation of the intrahepatic bile duct occurs infrequently
hepatic parenchyma is often inhomogeneous . triangular cord sign located cranial to
the portal vein bifurcation Central biliary cysts and choledochal cysts may be
associated with biliary atresia , other Congenital anomalies as situs inversus and
Till now the diagnosis of most cases of direct hyperB is done with these Ix
except some time we need to do more investigation to diagnose &
differntiate of idiopathic neonatal hepatitis , intra hepatic bile duct paucity ,
biliary atresia , so we need to do :-
Magnetic resonance cholangiography
Liver scan
Duodenal intubation
Liver biopsy
Magnetic resonance cholangiography
(MRC) , widely used to assess the
biliary tract in all age groups
Liver scan
Tc 99m iminodiacetic acid dye with the use phenobarbitone
5mg/kg/day orally for 5 – 7 days to induce biliary excretion then we do the scan ,
In biliary atresia there is good uptake but no excretion , while in hepatitis uptake is
sluggish with fair excretion .
Duodenal intubation
for measurement of B. in bile befor & after use of
phenobarbitone where there is no B. in biliary atresia while there is good amount
of B. in hepatitis .
liver biopsy provide the most reliable discriminatory evidence & Dx .
In biliary atresia there is bile ductular proliferation , bile plug ,portal or perilobular
oedema & fibrosis , lobular achitecture is intact .
In neonatal hepatitis , severe diffuse hepatocellular dis. , distortion of the lobular
crchitecture , infl. Cell infilteration , focal hepatocellular necrosis , bile ductules show
little alteration . Giant cell transformation present in both condition & have no
dignostic specificity
exploratory laporatomy some time may be needed
treatment of direct hyperbilirubinemia. (cholestasis )
include treatment of complication & original cause
for complication with any cause of neonatal cholestasis, whether idiopathic
neonatal hepatitis, intrahepatic cholestasis, or biliary atresia, affected patients are at
increased risk for chronic complications. These are due to diminished bile flow.
Give diet or formula with medium chain triglyceride , due to malabsorption of
longchain triglyceride (there is fat malabsorption due to bile salt &acid retention ) ,
give high dose fat soluble vit for the same reason .
Give some micronutrient as Ca ,Ph ,zink.
Give choleretics as ursodeoxycholic acid or bile acid binder as cholestyramine to
decrease itching , xanthoma .
develop progressive billiary cirrhosis ,portal hypertention , he may develop
oesophageal varices so we do endoscopy for proper Rx .
Oedema & ascites treated by salt restriction & diuretics as frussemide alone or in
combination with spironolactone .
End stage hepatic failure may need liver transplant .
Rx of the cause of direct hyperB. as in Galactossaemia we give him lactose free
formula , some infection may need Rx , surgery may be needed in biliary atresia or
choledochal cyst .
Biliary Atresia
The incidence is 1/10,000-15,000 live births , it is more in female , involve extrahepatic
billiary duct , but in some cases there is intra & extrahepatic involvement
Etiology It is unknown , but bile duct obliteration may be secondary to infection , toxins , or
autoimmune process . So any patient with jaundice at 2 month must be evaluated for
biliary atresia because surgery most effective before 2 months , otherwise biliary cirrhosis &
ascending cholangitis may occur
Clinical manifestation
Full term infants in whom J. develop during the 2nd – 3rd week of life , Acholic stool ,
Hepatomegally , Splenomegally which detectable by 8 weeks , Other than these physical
findings the infants appear healthy , But if patient not treated , they will develop
progressive liver dis. , cirrhosis & portal hypertesion.
A few infants with fetal onset of biliary atresia have an increased incidence of other
abnormalities, such as the polysplenia syndrome with abdominal heterotaxia, malrotation,
levocardia, and intra-abdominal vascular anomalies.
Lab investigation
LFT It demonstyrate direct Hyperbilirubinaemia & elevated serum alkaline phosphatase ,
gamma glutamyl transpeptidase .
U / S mention previously
Liver scan following 5 days of phenibarbital ( 5mg/kg/day ) ,
Percutaneous liver biopsy show bile duct proliferation with plugging & confirm the Dx in
95 % of cases .
exploratory laporatomy some time may be needed , All patients suspected of having
biliary atresia should undergo exploratory laparotomy and direct cholangiography to
determine the presence and site of obstruction & ; if biliary atresia Kasai procedure
(hepatoportoenterostomy )
Treatment & prognosis
A hepatoportoenterostomy, or Kasai portoenterostomy is a surgical treatment
performed on infants with biliary atresia to allow for bile drainage . the earlier the
operation ( <2 m. of age ) the greater the chance of establishing the bile flow. Surgical
success is judged by improvement in bile drainage ;
Without surgery Kasai procedure , patient will die cirrhosis before 2 yr. of age
25 – 50 % of patients survive 5 yr. after a successful Kasai procedure , but complications
of the procedure include progressive biliary cirrhosis & ascending cholangitis .
Another Rx for most infants is liver transplant which has 80 – 90 % survival rate .
Idiopathic Neonatal Hepatitis ( INH )
It is responsible for most of cases of idiopathic cholestasis in infants who are not
receiving parenteral nutrition . It is more in male , may be associated with growth
retardation . INH represents more than one dis. Resulting from infectiouse Or familial
causes .
Normal color stool with transient acholic stool , little increase ALP or gamma glutamyl
transpeptidase ( GGT ).
Biliary scan show the patency of the bile duct .
Liver biopsy shows numerous giant cells , lobular disorganisation , necrosis , &
inflammation without the neoductular proliferation & fibrosis characteristic of
extrahepatic atresia .
Prognosis is good & most patient recover within
6 - 8 month .
Differentiation of Idiopathic Neonatal Hepatitis & Biliary Atresia
Idiopathic Neonatal Hepatitis
 ¨ Familial incidence is 20 %.
 ¨ Usually no other abnormality
Biliary Atresia
Unlikely to recur in same family .
There is other abnormality as
polysplenia , malrotation levo cardia ,
intra abdominal vascular abnormality
No relation .
Persistant acholic stool
Persistant bile stained fluid after
duodenal intubation against Dx of BA
 More in premature & SGA infants.
 ¨ Normal color stool with transient
acholic stool
 ¨ In duodenal intubation the fluid is bile
stained .
 ¨ Liver size less common to be
 ¨ Hepatobiliary scintography there is
sluggish uptake & fair excretion . en
 ¨Liver biopsy . the most reliable
discreminatory test larged
Abnormal liver size & consistency
There is good uptake but no
¨Liver biopsy , exploratory laporatomy
(intrahepatic bile duct paucity) Biliary Hypoplasia
It is either syndromic as Aligille syndrome , arteriohepatic dysplasia ,or non syndromic .
Infants with Aligille syn.present with sign & symptomes of direct hyperB.with
facial features , cardiac valvular or peripheral pulm. stenosis , butter fly vertebrae ,
dysplastic kidney , hypercholesterolaemia with cutaneous xanthomas , dis. is AD
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