Skin transplant was done from sister to brother. After few years, brother to sister skin transplant was done, but rejection occurred. This phenomenon is known as
Eichwald silmser effect
Schultz Dale phenomena
Theobald smith phenomena
Schwazman reaction
Eichwald-Silmser effect, which is a unilateral sex-linked histoincompatibility. While transplants between same sex siblings are successful, grafts from female to male are also successful, but an exception is seen when the donor is a male and the recipient is a female. Such grafts are rejected as the grafted male tissue (XY) will have antigens determined by the Y chromosome which will be absent in the female (XX) recipient. Reference: Ananthanarayan and Paniker&;s Textbook of Microbiology Tenth edition
Immunology