A researcher adds a growth medium to a dish where stem cells are being grown. Stem cells are being used to help treat multiple sclerosis, sight problems, heart damage, spinal cord injuries, blood cancer and more. File picture: Nati Harnik/AP

A mother in desperate need of a transplant fears the former partner who killed her teenage son has now stolen her only chance of survival.

Tania Morris, 49, was diagnosed with Hodgkin lymphoma weeks after burying her only child, Nathan Bates.

The 19-year-old was bludgeoned to death with a hammer as he slept last year by his mother’s ex-partner Robert Goodwin, who then took his own life.

Miss Morris has been battling the disease for a year, but doctors have now told her that her last hope is a stem cell transplant.