<h3>Introduction</h3> Congenital dwarfism (achondroplasia) in severe form does not allow materials to be used as a routine aortocoronary artery bypass graft when the limb is very short. A saphenous vein homograft may be an option, but a vein graft taken from a close family member may be used. The report to introduce such a rare case at Viet Duc University Hospital, Vietnam. <h3>Case Report</h3> A case report of a man, 55 years old, severe congenital dwarfism with very short limbs, obesity, lipid metabolism disorders, stenosis - occlusion of 3 coronary arterial trunks with no indication for endovascular intervention, unstable angina, severe mitral regurgitation due to posterior ligament rupture, heart failure with an EF of about 50%. Mandatory indication for aortocoronary bypass and mitral valve repair. The patient's sternum was also deformed unfavorably to harvest the internal thoracic artery as a graft. The patient has a 25-year-old son with normal body shape and health. At Viet Duc Hospital, homograft has been used routinely, but no saphenous vein is available. <h3>Summary</h3> The procedure for organ donation was carried out in accordance with the law to use his son's saphenous vein as the main graft. Two operations were performed in parallel on November 26, 2019. The large saphenous vein in the two legs of the son was harvesting in two 20cm long segments - the operation went smoothly, and the son was awake and safe in 2 hours after surgery. Surgery for the father included two aortocoronary bypass (LAD and Cx arteries) using the son's vein, and mitral valve reconstruction with a ring. The postoperative process was quite favorable with some respiratory disorders, the endotracheal tube was removed after 3 days, the cardiac function and postoperative bypass were assessed well, the patient was discharged 17 days after surgery. The patient's son is also stable and discharged after 5 days. Periodic examination of patients in 2 years after surgery has good results. <h3>Conclusion</h3> In clinical practice, treatment solutions are very diverse and it is possible to explore and create the most reasonable solution for each specific complex situation. The case of using homograft donor tissue from a close relative, with legal procedures in accordance with the provisions of tissue-organ donation, as a material for coronary artery bypass grafting is such a situational solution.