Living donor liver transplantation (LDLT) is extensively adopted to expand the donor pool. Major issues are related to donor (future liver remnant as well as vascular and biliary complications) and recipient (adequate graft volume) safety. Complications can be avoided with an appropriate presurgical strategy. In 2019, Wang et al. reported a systematic use of 3-dimensional (3D) printing for LDLT planning, reporting better outcomes for donors and recipients. (1) We applied this method in our last LDLT. A 4-year-old child with biliary atresia underwent the Kasai procedure at birth followed by progressive hepatic failure with an indication to transplant. After 10 months on the waiting list, her mother proposed herself as a potential donor. Abdomen contrast-enhanced computed tomography (CT) scan, magnetic resonance imaging (MRI), and magnetic resonance cholangiopancreatography examinations were performed preoperatively to study the donor's anatomy and the liver's parenchyma. CT and MRI imaging data in Digital Imaging and Communication in Medicine format were imported into a 3D slicer to create 3D models of the liver anatomical structures. The portal vein branches and hepatic veins were segmented from the portal phase images, whereas