Winnie Mandela Has Kidney Ailment

Winnie Mandela was in serious but stable condition Thursday night, suffering from a kidney ailment, her doctors said.

Mrs. Mandela entered Johannesburg’s Linksfield Park Clinic for tests on Tuesday, a day after ending her dispute with her estranged husband, President Nelson Mandela, by resigning from his Cabinet.

Initial reports indicated her condition was stress-related and not serious. However, the clinic’s managing director, Dr. Peter Kalish, said Thursday that tests revealed Mrs. Mandela had “a severe electrolyte imbalance affecting her kidney function, blood pressure and blood sugar.”