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Related Concept Videos

Other Pulmonary Disorders01:17

Other Pulmonary Disorders

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Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
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Tumor Immunotherapy01:27

Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Orthotopic Transplantation of Syngeneic Lung Adenocarcinoma Cells to Study PD-L1 Expression
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Thymus Composition Predicts Pneumonitis Risk in Lung Cancer Therapy.

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    |November 24, 2025
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    Summary
    This summary is machine-generated.

    Residual thymic tissue (pTT) predicts pneumonitis risk in unresectable stage III non-small cell lung cancer (NSCLC) patients treated with chemoradiotherapy and durvalumab. Lower pTT indicates higher risk, aiding personalized treatment strategies.

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    Area of Science:

    • Oncology
    • Radiotherapy
    • Immunotherapy

    Background:

    • Durvalumab after chemoradiotherapy (cCRT) is standard for unresectable stage III NSCLC.
    • Pneumonitis is a common toxicity limiting immunotherapy.
    • Current predictors of pneumonitis lack individual discrimination.

    Purpose of the Study:

    • To investigate the thymus's role in post-treatment immune recovery and inflammatory toxicity.
    • To assess if thymic tissue proportion (pTT) predicts pneumonitis risk.

    Main Methods:

    • Analyzed NSCLC patients from RTOG 0617 (n=490) and MSKCC (n=230) cohorts.
    • Quantified pre-treatment percent thymic tissue (pTT) using CT imaging.
    • Used logistic regression to associate pTT, lung V20, and MDTR with high-grade pneumonitis.

    Main Results:

    • pTT was independently associated with lower severe pneumonitis risk across both cohorts.
    • Low pTT combined with high lung V20 identified patients at highest risk for pneumonitis.
    • MDTR showed a weaker, non-linear association with pneumonitis.

    Conclusions:

    • Percent thymic tissue (pTT) is a novel, independent predictor of severe pneumonitis.
    • pTT can improve risk stratification for patients undergoing cCRT and immunotherapy.
    • Incorporating pTT may personalize radiation planning and enhance treatment safety.