Four brothers in the U.K. have all been stricken with a rare, often fatal, genetic disorder, according to a BBC report.
Luke Hartley, 7, and his brothers Daniel, 11, Nathan, 13, and Joshua, 15, from Romsey, Hampshire in the U.K., were all born with the immune system disorder XLP — short for X-linked lymphoproliferative syndrome or Duncan's syndrome.
It is one of the rarest fatal genetic disorders in the world and is believed to affect only about 100 families, according to BBC.
Luke just returned home after a two-month stay over Christmas at Great Ormond Street Hospital in London, where he was undergoing a second bone marrow transplant. The first transplant the boy received failed. He is the last of the four to receive a transplant.
The brothers were diagnosed in November 2003 with XLP. Their parents, David and Allison Hartley, were told the boys were unlikely to reach their teenage years without bone marrow transplants.