the incidence of acute viral hepatitis a is continuously increasing in korea recently.1 patients present with fever , anorexia , nausea , vomiting , or jaundice , and frequently need hospitalization . the clinical course of acute hepatitis a is usually benign , and it is known that symptomatic treatment is sufficient for recovery.2 however , in rare cases , acute hepatitis a can be associated with serious complications which require prolonged hospitalization , and may result in death or liver transplantation.3 cholestatic hepatitis is one of atypical clinical manifestations of acute viral hepatitis . although it occurs only at a rate of 0.4~0.8% , protracted symptoms of anorexia , weight loss , pruritus , and jaundice are commonly associated.3 these clinical situations prolong the length of hospital stay , which causes increased medical expenses and social costs . it has been presented that there had been a rapid improvement of the clinical symptoms and signs in a patient with cholestatic hepatitis a after use of steroid.4 however , there is no detailed information on the progress of the patient . we recently experienced three cases of acute hepatitis a with severe cholestasis , whose serum bilirubin was promptly decreased following administration of steroid . herein , we report our cases with detailed description of clinical courses and review of literatures . three patients were referred to korea university ansan hospital for admission under the impression of acute hepatitis . the patients denied history of taking any medicines , excessive drinking , and presence of chronic liver disease . serologic tests showed negative responses to hepatitis b surface antigen ( hbsag ) , igm antibody to hepatitis b cores antigen ( igm anti - hbc ) , hepatitis c antibody ( hcv ab ) , and igm antibody to hepatitis e virus ( igm anti - hev ) , while positive immunereactivity to igm antibody to hepatitis a virus ( igm anti - hav ) was observed , in all patients . on the basis of the history and the laboratory findings , acute viral hepatitis a was diagnosed . supportive treatment with ursodeoxycholic acid , silymarin and intravenous fluid was done . however , sustained increase of serum bilirubin was observed . possibility of obstructive jaundice was ruled out based on abdominal ultrasonography or ct scan . to exclude the possibility of infiltrative liver disease or small bile duct injury , liver biopsy was performed . on histopathologic examination , 1 ) . however there was no bile ductular lesion . despite long - term conservative therapy possibility of the systemic infection other than viral hepatitis a was ruled out by absence of fever , leukocytosis , any abnormalities on chest x - ray , and pyuria . prednisolone 30 mg was administered until serum bilirubin fell below the half level of baseline value . thereafter , dose of steroid was tapered at intervals of two weeks and its administration was discontinued after 6 - 10 weeks ( table 1 ) . the more detailed clinical information of the individual cases is described on the followings . a 40-year - old man visited with complaints of general weakness for a week and jaundice for three days . his vital signs were stable , blood pressure of 140/100 mmhg , pulse rates of 94 beats / minute , respiration rates of 20/minute and body temperature of 36 on the visit . hepatosplenomegaly was not noted . neither pitting edema on extremities nor any neurologic abnormalities were found . on laboratory findings , complete blood count showed white blood cell ( wbc ) counts 4,370/mm , hemoglobin 17.3 g / dl , platelets 101,000/mm and his prothrombin time international normalized ratio ( inr ) was 1.64 . on serum biochemistry , the patient showed total bilirubin 23.5 mg / dl , direct bilirubin 12.4 mg / dl , ast 5,558 iu / l , alt 7,090 iu / l , alp 75 iu / l and gamma - glutamyl transpeptidase ( -gt ) 456 transient elastography measured the liver stiffness as high as 28.8 kpa . finally acute viral hepatitis a was diagnosed and he was treated symptomatically . on week 4 , although ast and alt levels decreased to 173 iu / l and 152 iu / l , respectively , total bilirubin was still as high as 19.8 mg / dl with direct bilirubin of 11.5 mg / dl . also , cholestasis maintained , with complaints of severe pruritus , anorexia , and body weight loss . on the 13 day of prednisolone administration , total and direct bilirubin decreased to 11.3 mg / dl and 6.1 mg / dl respectively with improvement of generalized symptoms , and he discharged . after 4 weeks following the administration of prednisolone , it was tapered off by 10 mg at intervals of two weeks . on the 8 weeks , total bilirubin decreased to 1.7 mg / dl ( fig . a 35-year - old man diagnosed with acute hepatitis a was referred to our hospital after 2-weeks of hospitalization in the other hospital . on admission , he looked acutely ill and icteric , but was in a clear mental status . on abdominal examination , a finger breadth of liver was palpable with mild tenderness in right upper quadrant area . complete blood count showed wbc counts 4,960/mm , hemoglobin 14.7 g / dl , platelets 420,000/mm and prothrombin time inr 0.94 . on serum biochemistry , the patient showed total bilirubin 31.79 mg / dl , direct bilirubin 17.3 mg / dl , ast 45 iu / l , alt 53 iu / l , alp 253 transient elastography measured the liver stiffness as 14.1 kpa . despite additional 2-weeks of conservative therapy at our hospital , total and direct bilirubin were still elevated up to 27.97 mg / dl and 16.28 mg / dl , respectively . liver biopsy was done and prednisolone was initiated at a dose of 30 mg . on the 23 day following administration of steroid , total and direct bilirubin declined to 13.2 mg / dl and 6.8 mg / dl . after 4 weeks of prednisolone therapy , it was tapered by 10 mg at intervals of two weeks and stopped after 12 weeks of administration . liver stiffness declined to 7.0 kpa on transient elastography . a 42-year - old man , who had fever and nausea , received a diagnosis of acute hepatitis a at a local clinic . on laboratory findings , complete blood count showed wbc counts 6,710/mm , hemoglobin 12.6 g / dl , platelets 434,000/mm and his prothrombin time inr 1.08 . on serum biochemistry , the patient showed total bilirubin 27.8 mg / dl , direct bilirubin 14.8 mg / dl , ast 475 iu / l , alt 104 iu / l , alp 121 liver stiffness was measured as 23.4 kpa on transient elastography . despite additional 3-weeks of conservative treatment , pruritus persisted , and appetite was decreased with significant body weight loss . on laboratory finding , total and direct bilirubin peaked up to 31.5 mg / dl and 14.8 mg / dl , while ast and alt were decreasing to 59 this led to biopsy of liver , after which 30 mg of prednisolone was administered . on 8 day of prednisolone , total and direct bilirubin were rapidly decreasing to 13.99 mg / dl and 7.73 mg / dl , respectively . liver stiffness declined to 20.1 kpa on 10 day with the improvement of generalized symptoms . the patient discharged and prednisolone was tapered at intervals of two weeks by 10 mg at outpatient clinic . nine weeks after steroid treatment , total bilirubin decreased to 0.32 mg / dl ( fig . a 40-year - old man visited with complaints of general weakness for a week and jaundice for three days . his vital signs were stable , blood pressure of 140/100 mmhg , pulse rates of 94 beats / minute , respiration rates of 20/minute and body temperature of 36 on the visit . hepatosplenomegaly was not noted . neither pitting edema on extremities nor any neurologic abnormalities were found . on laboratory findings , complete blood count showed white blood cell ( wbc ) counts 4,370/mm , hemoglobin 17.3 g / dl , platelets 101,000/mm and his prothrombin time international normalized ratio ( inr ) was 1.64 . on serum biochemistry , the patient showed total bilirubin 23.5 mg / dl , direct bilirubin 12.4 mg / dl , ast 5,558 iu / l , alt 7,090 iu / l , alp 75 iu / l and gamma - glutamyl transpeptidase ( -gt ) 456 finally acute viral hepatitis a was diagnosed and he was treated symptomatically . on week 4 , although ast and alt levels decreased to 173 iu / l and 152 iu / l , respectively , total bilirubin was still as high as 19.8 mg / dl with direct bilirubin of 11.5 mg / dl . also , cholestasis maintained , with complaints of severe pruritus , anorexia , and body weight loss . on the 13 day of prednisolone administration , total and direct bilirubin decreased to 11.3 mg / dl and 6.1 mg / dl respectively with improvement of generalized symptoms , and he discharged . after 4 weeks following the administration of prednisolone , it was tapered off by 10 mg at intervals of two weeks . on the 8 weeks , total bilirubin decreased to 1.7 mg / dl ( fig . a 35-year - old man diagnosed with acute hepatitis a was referred to our hospital after 2-weeks of hospitalization in the other hospital . on admission , he looked acutely ill and icteric , but was in a clear mental status . on abdominal examination , a finger breadth of liver was palpable with mild tenderness in right upper quadrant area . complete blood count showed wbc counts 4,960/mm , hemoglobin 14.7 g / dl , platelets 420,000/mm and prothrombin time inr 0.94 . on serum biochemistry , the patient showed total bilirubin 31.79 mg / dl , direct bilirubin 17.3 mg / dl , ast 45 iu / l , alt 53 iu / l , alp 253 transient elastography measured the liver stiffness as 14.1 kpa . despite additional 2-weeks of conservative therapy at our hospital , total and direct bilirubin were still elevated up to 27.97 mg / dl and 16.28 mg / dl , respectively . jaundice and malaise persisted liver biopsy was done and prednisolone was initiated at a dose of 30 mg . on the 23 day following administration of steroid , total and direct bilirubin declined to 13.2 mg / dl and 6.8 mg / dl . after 4 weeks of prednisolone therapy , it was tapered by 10 mg at intervals of two weeks and stopped after 12 weeks of administration . a 42-year - old man , who had fever and nausea , received a diagnosis of acute hepatitis a at a local clinic . the patient was referred to us after 4-weeks of in - hospital treatment . complete blood count showed wbc counts 6,710/mm , hemoglobin 12.6 g / dl , platelets 434,000/mm and his prothrombin time inr 1.08 . on serum biochemistry , the patient showed total bilirubin 27.8 mg / dl , direct bilirubin 14.8 mg / dl , ast 475 iu / l , alt 104 iu / l , alp 121 liver stiffness was measured as 23.4 kpa on transient elastography . despite additional 3-weeks of conservative treatment , pruritus persisted , and appetite was decreased with significant body weight loss . on laboratory finding , total and direct bilirubin peaked up to 31.5 mg / dl and 14.8 mg / dl , while ast and alt were decreasing to 59 iu / l and 30 iu / l , respectively . this led to biopsy of liver , after which 30 mg of prednisolone was administered . on 8 day of prednisolone , total and direct bilirubin were rapidly decreasing to 13.99 mg / dl and 7.73 mg / dl , respectively . liver stiffness declined to 20.1 kpa on 10 day with the improvement of generalized symptoms . the patient discharged and prednisolone was tapered at intervals of two weeks by 10 mg at outpatient clinic . nine weeks after steroid treatment , total bilirubin decreased to 0.32 mg / dl ( fig . clinical presentations are more severe with increasing age , so adults are more frequently associated with prolonged jaundice compared to children . the genotype of the viral hepatitis a is also reported to affect the severity of the cholestasis.5 however , exact causes of prolonged cholestasis are unknown . recently , the prevalence of its protective antibody has been decreasing in adolescents and adults in korea . according to this , there is a tendency that mean age of patients with hepatitis a is gradually increasing . therefore , it is expected that the number of patients who show severe clinical manifestation including prolonged cholestasis would increase.1 although presence of persistent cholestasis can still be managed symptomatically , this frequently lengthens hospital stay and causes medical expenses and socioeconomic loss . therefore it is imperative that the methods be developed to improve clinical courses more promptly in patients with acute viral hepatitis a complicated by persistent uncontrolled cholestasis . cholestasis can result from any defects in the step of the bilirubin metabolism ; decreased uptake of bilirubin , impaired conjugation in the hepatocytes , disorders of bile excretion into biliary system , or obstruction of bile ducts may involve . it is developed by the systemic and intrahepatic release of endotoxin ( lipopolysaccharide ) and pro - inflammatory cytokines including tumor necrosis factor- ( tnf- ) or interleukin-1 ( il-1).6 it is therefore conceivable that cholestasis associated with this inflammatory process can be improved by the administration of steroids . it is known that multidrug resistance - associated protein 2 ( mrp2 ) , a transporter protein which is involved in excretion of the bilirubin outside the hepatocytes during the steps of bilirubin metabolism , is inhibited by tnf- and il-1.7 dexamethasone inhibits the synthesis of tnf- and il-1 , and thereby prevents impairment of the function of mrp2 in the canaliculi of endotoxemic rats.8 in addition , there are several glucocorticoid responsive elements on the promoter region of the mrp2 gene,9 so dexamethasone induces the expression of mrp2 twice as much even in normal liver tissue and facilitates the metabolism of the bilirubin.10 it was reported that a short course of corticosteroids therapy resulted in a rapid decline of serum bilirubin levels and relief of pruritus in approximately two - thirds of patients with acute cholestatic viral hepatitis.11 however , there are also several contradictory reports that steroid therapy does not affect the clinical course or prognosis in patients with acute hepatitis with cholestasis . a prospective study conducted in 1981 with 77 acute viral hepatitis patients reported that there was no advantage with the use of corticosteroids early in the course of severe viral hepatitis.12 it was also reported that cholestasis spontaneously resolves although corticosteroids may hasten the resolution , but it may predispose the patient to develop a relapse of the hepatitis in a study which dealt with atypical clinical manifestation of viral hepatitis in 1992.13,14 therefore , there are still controversies on the efficacy of steroid therapy . however , there might be variable responses depending on the time point of the administration of steroid , and there would be patient groups which might be clinically benefited from steroid treatment with prudent patient selection . the clinical manifestations of acute cholestatic hepatitis a were presented recently in korea . in 21 patients , mean value of the peak total bilirubin was 17.2 mg / dl ( range , 11.4 - 44.9 ) and the mean time taken for bilirubin to be normalized was 93 days ( range , 70 - 169 ) . the study suggested that that severe cholestasis takes long duration to be improved by supportive care only , considering that most of the patients did not receive corticosteroid or other specific treatment.4 in the current cases , despite the symptomatic treatment , all the patients suffered from pruritus , anorexia , and body weight loss . besides , total bilirubin of 20 mg / dl or higher was not improved following approximately 4 weeks of conservative in - hospital treatment . following steroid administration , the level of total bilirubin decreased to half of the pretreatment value within the mean of 14.7 days ( range , 8 - 23 ) , and the prompt response is considered to have reduced the period of hospital stay . recently , transient elastography is being used to estimate the stages of the hepatic fibrosis in a noninvasive manner . we performed transient elastography in our patients who were in acute phase of viral hepatitis , and it was measured as high as 23.2 kpa in average . comparing the mean value of 11.9 - 13.3 kpa of the peak liver stiffness in acute hepatitis a patients from the studies we reported previously,15,16 it is notable that the patients in the current case series showed significantly higher values . considering that the histopathology showed at most portal or periportal fibrosis in these patients , this marked increase of liver stiffness it was also previously reported that the increased liver stiffness found in patients with acute hepatitis would be related to the severity of the hepatocyte swelling resulted from necroinflammatory process.17 however , there is no report demonstrated the increase of liver stiffness in acute viral hepatitis patients with corresponding histopathologic findings to our knowledge . in this sense , liver stiffness decreased in accordance with the stabilization of bilirubin level after treatment , which is a consistent finding with our previous reports.15 - 16 there was no recurrence of hepatitis in all of our three patients . during the administration of prednisolone it would be mandatory , however , to evaluate the possibility of recurrence of hepatitis following the discontinuation of prednisolone with monitoring of the clinical courses . taken together , corticosteroid therapy is effective in improving clinical courses of the patients with cholestatic hepatitis a. further placebo - controlled studies are also warranted to determine the efficacy of the steroid therapy in patients with cholestatic hepatitis who are refractory to a long - term conservative therapy .
acute hepatitis a is currently outbreaking in korea . 
 although prognosis of acute hepatitis a is generally favorable , a minority of patients are accompanied by fatal complications . 
 severe cholestasis is one of the important causes of prolonged hospitalization in patients with acute hepatitis a. in such cases , higher chances of additional complications and increased medical costs are inevitable . 
 we report three cases of severely cholestatic hepatitis a , who showed favorable responses to oral corticosteroids 
 . thirty milligram of prednisolone was initiated and tapered according to the responses . 
 rapid improvement was observed in all cases without side effects . 
 we suggest that corticosteroid administration can be useful in hepatitis a patients with severe cholestasis who do not show improvement by conservative managements . 
 clinical trial will be needed to evaluate effectiveness of corticosteroids in these patients .