How rectal cancer can lead to a pulmonary embolism — as Catherine O’Hara’s cause of death is revealed

This week, details from Catherine O’Hara’s death certificate were revealed by TMZ, which confirmed pulmonary embolism as the cause of death. It also showed she’d been receiving treatment for rectal cancer since March 2025, leaving fans and medical professionals to speculate about whether the two were connected.

How rectal cancer can lead to a pulmonary embolism — as Catherine O’Hara’s cause of death is revealed
This week, details from Catherine O’Hara’s death certificate were revealed by TMZ, which confirmed pulmonary embolism as the cause of death. It also showed she’d been receiving treatment for rectal cancer since March 2025, leaving fans and medical professionals to speculate about whether the two were connected.

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