A UK patient's HIV has become "undetectable" following a stem cell transplant - in only the second case of its kind, doctors report.

Axar.az reports citing Nature.

Treated for cancer, has now been in remission from HIV for 18 months and is no longer taking HIV drugs.

The researchers say it is too early to say the patient is "cured" of HIV.

Experts say the approach is not practical for treating most people with HIV but may one day help find a cure.

The male London patient, who has not been named, was diagnosed with HIV in 2003 and advanced Hodgkin's lymphoma in 2012.

He had chemotherapy to treat the Hodgkin's cancer and, in addition, stem cells were implanted into the patient from a donor resistant to HIV, leading to both his cancer and HIV going into remission.

Researchers from University College London, Imperial College London, Cambridge and Oxford Universities were all involved in the case.