CT-282 Case Report: Successful Management of Severe Veno-Occlusive Disease after Allogeneic Stem Cell Transplantation Using a Transjugular Intrahepatic Portosystemic Shunt.

Veno-occlusive disease (VOD), also called sinusoidal obstruction syndrome (VOD/SOS), of the liver is a complication of allogeneic bone marrow or peripheral stem cell transplantation and is known to be an unpredictable, life-threatening complication with high mortality. We report here a case of a 24-year-old male patient who was diagnosed in 2019 at Gustave Roussy institute with AML. The patient was treated with the AML protocol 3+7 in December 2019 with a complete cytologic response and a positive MRD. Leukemia relapse was observed in September 2020, treated by gemtuzumab ozogomycin and cytarabine with a negative MRD. A successful allogeneic bone marrow transplantation from an HLA-matched pheno-identical related donor was conducted on December 22, 2020, using a myeloablative conditioning regimen. The patient was always controlled by a daily blood test and controlled blood transfusions, and a weekly repeated Doppler ultrasound examination did not indicate a high-risk profile of VOD. However, 12 days post transplant, the patient's condition deteriorated with the appearance of abdominal ascites, weight gain of 6 kg (per base 76 kg), and liver cytolysis with ASAT 72 UI/L, ALAT 86 UI/L, and normal bilirubin. Worsening cytolysis was observed, with ASAT 659 UI/L, ALAT 557 UI/L, and normal bilirubin. A Doppler ultrasound found 5 positive criteria of VOD (hepatomegaly, portal dilation, enlargement of the gall bladder wall, splenomegaly, ascites, decrease in the diameter of the subhepatic veins). Defibrotide was initiated. The patient's condition worsened and was refractory to medical therapy. Transjugular intrahepatic portosystemic shunting (TIPS) was performed 13 days after transplantation without technical complications in any case. The median hepatic venous pressure gradient prior to the procedure was 20 mmHg with a drop to 12 mmHg. An abdominal CT scan showed an under hepatic hematoma with hemorrhagic syndrome. Ascites puncture with abdominal drain installation was done. In summary, following TIPS, the patient showed clinical improvement, and VOD resolved subsequently with a complete remission post allogeneic transplant.