Case presentation:

• Male.
• 6 y.o.
• Liver transplantation.
• November 2004: Alagille syndorme, extrahepatic liver atresia, Kasai, Ascitis, Hepatorenal syndorme, EBV+, CMV+.
• January 2007:Liver Tx -December 2009: Big laterocervical lymph nodes. Suspicion PTLD: PET CT, MRI.