A death certificate has revealed that Kris Jenner‘s mother, Mary Jo Shannon (née Campbell), died of acute cardiopulmonary arrest, according to Us Weekly. The medical report also revealed that Shannon, known affectionally to fans as “MJ,” suffered from acute respiratory failure and metastatic lung cancer. Per the death certificate obtained by the outlet, she’d had these conditions for months. The death certificate said she was cremated on July 23 and that no autopsy was conducted. MJ married her third husband, Harry Shannon, in 1962 and the couple remained together until his 2003 death.