Hannah Dahn

Papers

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About

Hannah Dahn is a radiation oncologist whose research focuses on optimizing radiotherapy techniques to minimize long-term toxicities, particularly secondary cancer risks, in early-stage breast cancer patients. Her most cited work, "Estimation of Annual Secondary Lung Cancer Deaths Using Various Adjuvant Breast Radiotherapy Techniques for Early-Stage Cancers" (2021, 16 citations), addresses a critical clinical dilemma: while adjuvant breast radiotherapy improves local control, it can paradoxically increase the risk of secondary lung cancers decades later. Dahn and her team hypothesized that this risk is especially relevant for early-stage patients with excellent long-term prognoses. By modeling different radiotherapy approaches, they demonstrated that technique selection—such as using deep inspiration breath-hold or proton therapy—could substantially reduce projected secondary lung cancer mortality. This work provides actionable data for clinicians to tailor treatments, balancing oncologic benefit against late toxicity. Dahn’s research exemplifies the shift toward personalized, risk-adapted radiotherapy, where long-term survivorship and quality of life are prioritized alongside disease control. Her contributions are particularly valuable for trainees and researchers interested in radiation physics, late effects, and survivorship care.