immunology allergic disorders
Tissue Transplantation
Thymus Implants
Fetal thymus tissue obtained from stillborn infants may restore immunologic responsiveness when transplanted into children with thymic aplasia and resulting abnormal development of the lymphoid system ( DiGeorge Syndrome ). Because the recipient is immunologically unresponsive, immunosuppression is not required; however, severe graft-vs-host disease may occur. 