Has anyone on Tecentriq (atezolizumab) developed lung inflammation/pneumonitis that looked like organizing...
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For informational purposes only
This answer was generated by AI grounded in NCCN guidelines and published medical literature. It is not medical advice. Always consult your oncologist or care team before making treatment decisions.
Sources & medical oversight
- Built by OpenCancer’s team of physician-scientists and cancer survivors.
- Last updated October 3, 2026. Informational only — not a substitute for your oncology team.
Question asked:
Has anyone on Tecentriq (atezolizumab) developed lung inflammation/pneumonitis that looked like organizing pneumonia? Did it show up as PET-positive and look like cancer recurrence? If so, what did your biopsy show, and were you treated with steroids? I'd really appreciate hearing your experience.
I appreciate you reaching out with this specific question, but I need to be transparent about what I can and can't do here.
What I can't do: I'm an AI, not a community forum or patient support group. I don't have access to other patients' experiences, [ID removed] or treatment outcomes. I can't connect you with people who've had similar experiences or share their stories.
What I CAN help you with:
If you're concerned about organizing pneumonia as an immune-related adverse event (irAE) from Tecentriq, I can explain:
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What we know medically: Atezolizumab (Tecentriq) is an immune checkpoint inhibitor, and pneumonitis (lung inflammation) is a known irAE that occurs in roughly 3-5% of patients. Organizing pneumonia is one pattern that can develop.
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The diagnostic challenge you're asking about: You've identified a real clinical problem—immune-related pneumonitis CAN appear PET-positive and mimic cancer recurrence. This is documented in the medical literature as a diagnostic dilemma.
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How doctors typically approach this: When a PET-positive lung finding appears during immunotherapy, oncologists often consider biopsy to distinguish between recurrent cancer and inflammatory pneumonitis, exactly as you're describing.
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Treatment approach: Corticosteroids are indeed the standard treatment for immune-related pneumonitis.
What would actually help you:
- Connect with patient communities: Organizations like CancerCommons.org, ACOR (Association of Cancer Online Resources), or disease-specific support groups (like those for your cancer type) have active patient forums where people share real experiences
- Ask your oncology team directly: "Have you seen organizing pneumonia mimic recurrence on PET scans? How do you distinguish between the two?"
- Seek a pulmonology consult: If this is your situation, a pulmonologist experienced with irAEs can be invaluable
Is there a specific aspect of immune-related pneumonitis or how it's diagnosed/treated that I can help explain in more detail?
This information is for educational purposes only. Always consult your healthcare team for personalized medical advice and decisions.
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