‘Shame and stigma’: News of Catherine O’Hara’s rectal cancer brings hope for more awareness CTV NewsCatherine O’Hara died of blood clot in lung, says L.A. Medical Examiner’s Office CBCCatherine O’Hara’s cause of death revealed Global NewsCatherine the great: Despite living in L.A., O’Hara never stopped being a proud Canadian Yahoo News CanadaCatherine O’Hara’s death certificate reveals rectal cancer diagnosis. What to know. USA Today