Abstract
Allogeneic stem cell transplant (allo SCT) is a curative treatment for many hematological malignant and non-malignant diseases and provides a long lifespan. Complications occur due to the conditioning of chemotherapy and defects in the immune system. The risk and the type of complications depend on multiple factors including conditioning chemotherapy, the age of the patient, time of allo SCT, the comorbid conditions and other prognostic parameters. Relapse of the underlying primary disease and graft-versus-host disease (GVHD) are leading causes of death, Early complications that occur in the first 100 days of SCT are infections, acute GVHD, engraftment syndrome, hemorrhagic cystitis, sinusoidal obstruction syndrome, thrombotic microangiopathy, and upper respiratory complications. Delayed post-transplant complications occur after day 100 and include cardiovascular, respiratory, nephropathy, chronic GVHD of the liver, liver cirrhosis, hormone imbalances, diabetes, infertility and secondary malignancies. A transplant physician should be aware of the possible complications post-SCT and the management of these complications.