Liver Transplantation as a Cure for Neurologically Advanced Wilson’s disease. Learning More from Experience
Montefiore Medical Center, 111 East 210th street, Bronx, NY, USA
Academic Editor: Yasuhiko Sugawara
Special Issue: Pediatric Liver Transplantation
Received: July 05, 2020 | Accepted: November 02, 2020 | Published: November 11, 2020
OBM Transplantation 2020, Volume 4, Issue 4, doi:10.21926/obm.transplant.2004123
Recommended citation: Moguilevitch M, Straker T. Liver Transplantation as a Cure for Neurologically Advanced Wilson’s disease. Learning More from Experience. OBM Transplantation 2020;4(4):9; doi:10.21926/obm.transplant.2004123.
© 2020 by the authors. This is an open access article distributed under the conditions of the Creative Commons by Attribution License, which permits unrestricted use, distribution, and reproduction in any medium or format, provided the original work is correctly cited.
Liver transplantation remains the primary treatment option for patients with acute liver failure secondary to Wilson’s disease. Without transplantation, mortality is very high. However, the indications and time frame for liver transplantation in patients with Wilson’s disease which progresses to cirrhosis are still not clearly identified in the literature. There are multiple reasons for the disease progression: some patients with advanced Wilson’s disease were not started on copper chelating agents in a timely manner, other did not respond to treatment or demonstrated poor adherence. The rate of progression of liver disease with development of cirrhosis and neuropsychiatric complications is usually multifactorial and the decision of transplanting these patients is very complex. Compiling the indications for liver transplantation in this patient population is extremely important and it is the focus of this discussion. We would like to share our unique experience and outcome after liver transplantation of a patient who suffered significant neurologic damage from the advanced Wilson’s disease.
A 15 year-old, 28 kg male, without any medical conditions developed signs of liver disease at the age of 9 when he was first diagnosed with elevated bilirubin. His disease rapidly progressed with development of drooling, headaches, and speech disturbance. He failed Penicillamine and Zinc therapies, and presented to our center with tremors, stiffness, developmental and cognitive delays, dysarthria, dysphagia, and inability to ambulate. According to the family, the child was compliant with the treatment. At the time of admission he was dependent on G-tube feedings for nutrition and was wheelchair-bound. His Magnetic Resonance Imaging (MRI) scan of the brain showed significant volume loss, atrophy, and mineralization of the basal ganglia and substantia nigra (Figure 1). Ophthalmologic examination demonstrated Kayser-Fleischer rings. Liver biopsy performed shortly after admission, revealed signs of cirrhosis, mild portal inflammation, bile duct proliferation, and focally increased stainable copper on Rhodanine stain. Treatment with Trientine and Zinc failed to halt the progression of neurologic symptoms.
His laboratory findings were significant for alkaline phosphatase 230 IU/L, hematocrit 28 percent, albumin 3.2 g/dl, total bilirubin 2.3 mg/dl, and direct bilirubin 0.6 mg/dl, ceruloplasmin 6 mg/dL, 24 hours urine copper 240 mcg/dL. The rest of the laboratory findings were within normal limits.
After thorough multidisciplinary evaluation and bioethical committee approval, the patient was listed for liver transplant with Pediatric End Stage Liver Disease (PELD) score of 40. Additional points were given for the failure to thrive and devastating neurologic comlications of the disease. The transplant team and the patient’s family were aware that neurological symptoms may not be reversible after the surgery. There was no living donor liver offer available for this patient. Shortly after listing the patient received deceased donor ABO compatible whole liver graft. The liver transplant was uneventful, and required no blood or blood product transfusion. No signs of significant portal hypertension were noticed during the surgery. Eight months after transplantation, the patient became verbal with normal swallowing, gained wait, and demonstrated ability to ambulate. His tremors and stiffness were completely gone. We were able to observe complete resolution of his neurologic deficits in twelve months after transplantation.
Wilson’s disease (WD) is an inherited autosomal recessive disorder of copper metabolism that affects approximately 1 in 30,000 people. The carrier rate of this disease is 1 in 90 . The disease results from dysfunction of the copper-transport adenosine triphosphatase mechanism in the ATP7B gene in the liver. This gene is responsible for excreting copper into the bile [2,3]. Failure to incorporate copper into the ceruloplasmin is also a consequence of the dysfunctional ATP7B protein. The hepatic production and secretion of the abnormal protein apoceruloplasmin results in decreased levels of ceruloplasmin, which is found in most WD patients . The abundance of disease-specific mutations and their location at multiple sites across the genome have made molecular genetic diagnosis difficult. The subsequent copper accumulation, primarily in liver and brain, leads to hepatic and neurological manifestations .
Wilson’s disease has a highly variable onset and clinical course [6,7,8]. In many cases, symptoms of the disease are nonspecific. Children and young adults are more likely to present with progression of liver disease. The presentation can vary from fulminant hepatic failure to a slow progression of decompensated cirrhosis. Late onset WD presents with neuropsychiatric symptoms, such as tremor, dysarthria, ataxia, rigidity, dyskinesia, cognitive impairment, and mood disturbances. Many patients with psychiatric or neurologic manifestations may have asymptomatic cirrhosis. Extra-hepatic manifestations include renal symptomatology such as aminoaciduria, nephrolithiasis, arthritis, premature osteoporosis, cardiomyopathy, hyperparathyroidism, pancreatitis, and infertility [9,10,11,12,13,14].
According to the latest guidelines published by the European Society for Pediatric Gastroenterology, Hepatology and Nutrition (ESPGHAN), European Association for Study of the Liver Disease (EASL), and Indian National Association for Study of the Liver (INASL)the diagnosis of WD is based on the combination of biochemical laboratory tests assessing copper metabolism, a broad spectrum of clinical features, and molecular analysis of the mutations in the ATP7B gene [15,16,17]. Corneal copper deposition called the Kayser- Fleisher ring, hemolytic anemia due to deficiency of ceruloplasmin, and neurologic symptoms are considered to be the most common clinical symptoms. Twenty-four hours urine copper, hepatic copper concentration, ceruloplasmin, and the presence of the ATP7B gene mutation are laboratory tests used to confirm the final diagnosis of WD.
In 2001, at the 8th International conference on Wilson’s and Menkes disease in Leipzig the scoring system for the diagnosis of WD was discussed. A combination of clinical and biochemical tests with the score ranging from 0 to 4 for each test were developed. The aim of this system was to provide objective criteria with high sensitivity and specificity for the diagnosis of Wilson’s disease. The patients with the total score of at least 4 are diagnosed with WD. Approximately five percent of all WD patients present with new onset acute liver failure, and require emergency liver transplantation that is life saving . According to the studies by McCullough et al and Schilisky et al, the diagnosis of Wilson’s disease in the acute liver failure setting is more challenging because traditional copper metabolism parameters are less reliable, and specific [19,20]. Korman et el demonstrated that the ratio of alkaline phosphatase to total serum bilirubin with a value of less than 2, in combination with the ratio of aspartate aminotransferase (AST) to alanine aminotransferase (ALT) with a value of greater than 2.2, has 100% sensitivity and specificity . These tests are proven to be reliable for the adult patient population with a relatively low Model for End Stage Liver Disease (MELD) score. In pediatric patients, bone-derived alkaline phosphatase can play a role in making the ratio of AST to ALT of 2.2 less reliable. Koppikar et al  proposed the Wilson’s scoring index, which is composed of the international normalized ratio (INR), AST, white blood cells, albumin, and bilirubin for pediatric patients.
Until transplantation can be performed, temporizing measures like plasmapheresis , exchange transfusion , fractionated plasma separation and absorption (FPSA) , and molecular adsorbent recycling system (MARS)  can be helpful.
Liver transplantation for chronic Wilson’s disease is the definitive treatment for the metabolic disorder, and resolution of the hepatic failure associated with WD. Liver transplantation reverses biochemical and clinical futures of Wilson’s disease, but its effect on neurologic symptoms is not very well established. The first successful resolution of neurological disorders after liver transplantation for chronic Wilson’s disease was reported in mid 90’s [27,28,29]. The decision to perform liver transplantation in these cases was based on deteriorating neurologic status with relatively stable liver function.
Likewise, Kassman et al  reported the case of a 22 year-old male with advanced neurological impairment and significant psychiatric manifestations secondary to Wilson’s disease. The patient demonstrated normalization of liver metabolic function after liver transplantation. Unfortunately, neurological recovery was slow and incomplete, while the psychiatric manifestations never improved. He committed suicide 43 months after transplantation.
There are many studies that retrospectively analyzed liver transplant patients with Wilson’s disease and varying degrees of neurological and psychiatric deterioration [31,32,33,34]. All patients showed an improvement, or complete disappearance of the neurological symptoms. The notion that better results can be achieved in transplanting patients with mild to moderate neurological deterioration has not been proven yet . Wang et al demonstrated that results are favorable in patients with advanced neurological deficits after living-related liver transplants . However, several studies have reported death as an outcome of liver transplantation for patients with neurological manifestations [27,28,29,30,31,32,33]. Despite the death of several of their patients, the authors have advocated liver transplantation for neurologically challenged patients.
There is minimal data available on the predictors of outcome on transplanted patients with varying degrees of neuropsychiatric symptoms of Wilson’s disease, and their long-term survival. Medici et al presented a retrospective multicenter analysis of the outcome of 37 patients transplanted for Wilson’s disease . More than a third of the patients had multiple presentations of neuropsychiatric compromise. The authors used a scoring system to retrospectively assess the patient’s pre-and post-operative neurological status. Reported patient and graft survival at 3 months, 12 months, 3 years, 5 years, and 10 years after transplantation were, respectively, 91.8%, 89.1%, 82.9%, 75.6%, 58.8%, and 85.3%, 83%, 77.1%, 70.3%, 47.2%.
According to the authors, neurologic symptoms significantly improved or completely resolved in 70 % of the patients after transplantation, but survival in this cohort was lower than in patients with liver disease alone (P= 0.04). Wang et al demonstrated similar results in his retrospective study of eighteen living related liver transplants for Wilson’s disease . Among these eighteen patients, seven had mild to moderate neurological involvement. All showed improvement of their symptoms after surgery, but also demonstrated a slightly lower survival rate. The follow up time in this study ranged from 2 to 32 months.
Guillaud et al studied the biggest cohort of the Wilson’s disease patients presented in the literature who underwent liver transplantation . They analyzed retrospectively medical records of 121 French patients transplanted for WD, seventy-five were adults (median age 29 years, (18-66)) and 46 were children (median age 14 years, (7-17)). The indications for liver transplantation were fulminant hepatic failure, decompensated cirrhosis, and severe neurological disease. Multivariate analysis of different groups of patients with different indications for transplantation concluded that liver transplantation allowed to achieve good long-term outcome, including improvement of renal function.
Two latest papers by Poujois et al  and Ferrarese et al  specifically looked at the outcomes of Wilson’s disease patients transplanted for neurological indications. Both articles recommended very careful approach to patients selection for the liver transplant surgery and indicated limited benefit of this procedure to improve neuropsychiatric symptoms or signs of the disease.
Liver transplantation remains the treatment of choice for acute liver failure related to Wilson’s disease. Transplantation is indicated when patients develop cirrhosis, become unresponsive, or have never been on cooper chelating agents. Liver transplantation is a good option for symptom improvement or sometimes complete cure in patients that develop neurological deficits related to Wilson’s disease. Nonetheless, there is not enough data available to draw a conclusion about the clear beneficial effect of liver transplantation in all cases of neurologically affected Wilson’s disease patients. It is more research needed to look at larger cohorts in order to provide better stratification for postoperative survival and long term follow up of these patients. Our case can contribute to the ongoing effort to identify indications, predicting factors of cure, and survival after liver transplantation for the patients with chronic Wilson’s disease.
The authors would like to thank the patient’s family for supporting us in sharing this case report.
All authors participated in manuscript creation, review process, and revisions.
The authors have declared that no competing interests exist.
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