*This machine-generated transcript may have errors. If remediation or a manually-generated transcript is needed, please contact NLM Support at https://support.nlm.nih.gov.* Mhm. Well a United States Army Medical Department continuing education program, liver dysfunction, post transplantation with William A. Briggs, Lieutenant Colonel, US Army Medical Corps Chief nephrology service walter reed Army Medical center Washington, D. C. Now the insidious but progressive or abrupt and striking elevations of serum liver enzymes. With or without hyperbole room anemia or with or without clinical symptoms occur with annoying frequency In this particular population of patients and in the walter reed experience slightly more than a half of patients have demonstrated elevations of serum serum trans am in its and lactic di hydrogen is enzyme levels at some time in their course, which were not readily attributed to extra hepatic disease. This problem is particularly troublesome because in addition to the need to sort out the differential diagnosis, a number of other considerations arise. For example, is the patient infectious and is the handling of the patient's blood hazardous to the staff and other laboratory personnel of the hospital? Will alterations in drug therapy be necessary? And what effects will this development or its management have on the overall course of the patient? Well, like any problem in clinical medicine, we have to face problem of liver dysfunction with the differential diagnosis. I could have the first lot. First of all, it's necessary to consider and exclude or rule in potential sources of confusion relevant to the interpretation of abnormal elevations and S. G. O. T. Or even S. GPT. Or the LDH is so enzymes, muscle necrosis from recent surgery from intra muscular injections, our potential source of confusion resolving large hematomas as red cells break down release can release striking amounts of enzymes, pulmonary disease. Either pneumonia or infarction can cause elevations in enzymes, which might be interpreted as coming from liver renal infarction related to severe rejection or cortical necrosis may cause elevations in serum enzyme. And then interestingly enough, there are a number of drugs which have been reported to interfere with the cholera metric essay for Trans AM in Aces. And looking over the list drugs which have been reported to do this and which might be given to transplant recipients include Aretha mason, hydra, lysine ison, is it alpha methyl dopa? So for fires all and tom you know, mine. So the implication is to not only in terms of considering hepatitis cellular disease or hypersensitivity liver disease, one should look at the drugs of the patients on and then find out from the clinical pathologist running the laboratory where the particular essay or the techniques for the essay would allow a possible interference with S. A. Congestive heart failure, obviously with right sided failure, and the paddock congestion can result in striking liver function abnormalities. In addition, any patient who has recently sustained shock syndrome for many cause may have had a period of inadequate hepatic profusion in the schema, ca paddock necrosis. Now more commonly is the problem of infection Again, patients with factory MIA, predominantly gram negative bacteria, MIA, but also indo toxemia. In some cases with gram positive, back to re miA, one can get Apache non specific hepatitis cellular necrosis or infiltration with abnormal liver function. Test much more commonly considered is that infection related to viral hepatitis and its differential diagnosis. Now, first of all, a lot of attention has been given to the high incidence of cytomegalovirus infection and immuno suppressed patients. In general, patients with cancers and renal transplant patients in the walter reed experience ed Morrison of the infectious disease Service has determined that almost 1/2 of the patients Show a four fold or greater rise in complement fixing anti cmv. E antibody tighter following transplantation. This including rises in antibody tigers, on the basis of both primary responses and secondary responses. A fair proportion of patients come to transplantation already with greater than 1-4 antibiotics. Fighters against c. m. v. And I mentioned earlier that slightly more than half of the patients at some point in time also have abnormalities and liver enzymes. However, in only approximately half of those patients manifesting liver function abnormalities has there been a temporal relationship between the liver dysfunction, often with clinical symptoms and C. M. V. C. Zero conversion to reasonably implicate that virus in the pathogenesis of the hepatitis. Uh huh. So in addition to cytomegalovirus, which obviously is a common cause, one must still consider other viral agents. Hepatitis A is unless one has a family source of infection or some point source of infection to determine incubation time. We, at this point in time do not have access to laboratory assays which will permit the detection of antigens associated with uh hepatitis A virus. But certainly it has to be retained in the differential diagnosis, particularly in patients who are at a negative or a G. B. Negative without evidence of C. M. V. Serial conversion. Obviously hepatitis B is an agent which requires serious consideration in this population of patients and in the walter reed experience, there have been six patients showing Ciro conversion uh or serum manifestation of A G. B. In the serum, some sub clinically others with evidence of hepatitis. Now the information is incomplete at this time on determining how many patients have evidence of zero conversion for anti AGB, evidence for the development of antibody against ah hepatitis virus B. When this information is available, perhaps a greater proportion of those patients with hepatitis, but without C. M. V. Zero conversion will be determined to have sustained infection with hepatitis B. There's another hepatitis viral agent which has been proposed and that's Hepatitis C virus. This was proposed mainly by Prince who followed patients receiving transfusions and determine among those patients with long incubation hepatitis that only approximately half of those patients had evidence for the development or infection with hepatitis B virus. In their examination of that included follow serial examinations for energy and be serial examinations for anti H. A. Antibody. And in addition in the negative patients also testing for antibody against core an urgent of hepatitis the virus. The incubation periods from the point source which was a transfusion were entirely equivalent to the incubation period seen in patients with and Hepatitis B infection. And beyond the point considered reasonable for hepatitis A. These patients were also examined for evidence of serial conversion for antibodies against C. M. V. And what the data showed was that there wasn't any difference in the rate of conversion. Again, C. M. V between uh different groups that is those not developing hepatitis, those developing long incubation hepatitis with evidence for a hepatitis B infection and then the others uh KGB negative, long incubation hepatitis. So on the basis of that, his group felt that this other group of patients could not be explained on the basis of cytomegalovirus hepatitis. That probably is open to argue, but these are the major viral agents considered at this point in time. Hepatitis and renal transplant patients, R. C. M. V. Hepatitis B. And possibly this other very interesting group who may be infected with hepatitis C. Not to be overlooked is the possibility that Epstein Barr virus may be involved in causing hepatitis in this population of patients. Few studies where examination for Ciro conversion for Epstein barr has been examined, it's been found. In addition, there have been studies demonstrating zero conversion for Herpes Simplex virus around the time of hepatitis. But the real confusing thing for me is the overlap and apparent inter relationships between simultaneous zero conversion for hepatitis and it can be C. M. V. Herpes virus so that it becomes very difficult to sort out what's the primary agent causing the hepatitis versus those which may be turned on simultaneously in some sort of animistic response we're related to the same. We're actually in fact simultaneously causing infection. So this is an area of some confusion and no doubt there will be other viruses implicated as time goes on. Coxsackie viruses et cetera, which may be involved in causing the liver dysfunction commonly seen in these patients, which cannot be specifically diagnosed and attributed to recognized agents. Uh, at this point in time for completeness sake, fungal and parasitic involvement of the liver should not be overlooked, especially in high risk patients or in the appropriate clinical setting. Now, the other major differential consideration probably besides viral infection, is drug toxicity, either geppetto cellular or cola stat. And we must, I've selected out of long lists of potential drugs capable of causing a paddock dysfunction, those which may be a utilised in or by transplant patients. Ethanol needs no further comment. He's a thigh. A prim to me is a very interesting consideration. There's always been talk about primary is a thigpen HEPA no toxicity. However, in the vast majority of reported cases or cases talked about it was very difficult for me to be sure that in fact, as a fire brown was the culprit, since they're often multi factorial considerations in the patient who develops hepatic dysfunction. However, there's no question in my mind that is a thigh a prin maybe synergistically HEPA toxic or help a toxic superimposed on previously injured liver. However, there have been cases reported and other people have seen cases where it has felt certain today is a fire pit has in fact been the primary HEPA toxic agent. Al appear in all is an agent which may be prescribed to patients with hyper euros anemia and in addition to the danger associated with its use in a patient on a South I appear in this drug also not infrequently causes liver dysfunction. Virtually all the anti tuberculosis drugs have been associated with liver enzyme elevations if not hepatic dysfunction. Almost all the anabolic steroids, which are not used very commonly but may be utilized been associated with liver dysfunction as have contraceptive medication and then young women who ah In whom birth control is exercised. This is one modality which may be associated with liver disease and a convulsant drugs. Matthias scenes alpha method opa are commonly recognized agents patient undergoes another surgical procedure. One must always look at the record to see if there's any possible association with halothane anesthesia. And then just about all these phantom I'd derivatives, antibiotics, oral hypoglycemic agents, diuretics, et cetera, et cetera, et cetera have been reported to cause hepatic injury or hispanic dysfunction. So obviously it's very important to go back and critically scrutinize the patient's drug list to see if there's any possible agent which can be removed and reverse the the paddock disorder. And again, for completeness sake, it's very important not to forget. Many of the patients who come to transplantation May at one point in time developed separate biliary tract disease and require either medical or surgical treatment for that. And of course the other common association with liver function abnormalities with or without hyper billy, Rubin, EMEA, etcetera. Is that not uncommonly seen in association with pancreatitis, which also is a problem which comes up with some frequency and post transplant patients. The other thing, assuming that one does not identify some extra hepatic disease or is unable to identify a drug which can be discontinued with resolution of the problem. The other consideration is what to do, first of all, is the liver biopsy in the kids. Now, unfortunately, I think in most people's experience liver biopsy all too frequently is not diagnostic and not terribly helpful in the absence of specific hissed a pathologic findings for certain problems. So in individual cases, liver biopsy uh is not necessarily indicated. I think probably an important role for liver biopsy with being a protocol type prospective evaluation of the paddock dysfunction in these patients. Where at the end of collecting a large amount of data, one could hope to come up with some uh correlation between history, pathologic abnormalities and certain ideology. The other consideration is whether there should be any modification in drug therapy, particularly in patients with clinical hepatitis can a disease liver metabolizes Ethiopian appropriately so that the drug is still immuno suppressive. Is there any reason to believe that discontinuing as Cynthia Perrin will speed up the recovery rate of the hepatitis. And in those patients with let's say uh H. A. Positive hepatitis will altering immuno suppressive therapy improve the patient's ability to clear the energy. Well I used to have some thoughts about all that, all of which has been annihilated by various peoples different experience such that many patients with clinical hepatitis of whatever variety with no alteration in their drug therapy, the problem resolves. And in fact I just heard this meeting that Wilford Hall group has had patients who have developed a G. B. Hepatitis with serial conversion positive and then back to negative again with no modification of the recent thigpen therapy. She's very, very interesting, liver dysfunction, post transplantation with William A. Briggs, Lieutenant Colonel, US Army Medical Corps Chief nephrology service, walter reed Army Medical Center Washington D. C. Was produced through the mobile facilities of the television division, Academy of Health Sciences, United States Army Fort SAm Houston texas.