BBC NEWS | Health | Stem cell 'cure' boy gets tumour
A boy who received foetal stem cells as part of a treatment regime in 2001 is now being treated for tumours centred around the injection sites. Analysis of the cells indicate that they could not have come from his own tissue, leading doctors to conclude that they arose from the stem cells used in to treat his illness. Two tumours were previously detected and removed from the injection sites in 2005. Researchers suggest that the condition originally being treated, Ataxia Telegienctasia, may have weakened his immune system and rendered him more susceptable to tomour formation.