A Bloody Cough and Clouded Lungs: Uncovering a Systemic Culprit in an Adolescent.

Wells, Christina; Cho, Hyung-Gyo; Gude, Sai Sravya; Chen, Disi; Amornruk, Nutchaya; Cheng, Melanie; Basak, Ratna · Pediatrics · 2026

case_report · Level V

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Abstract

Hemoptysis secondary to diffuse alveolar hemorrhage (DAH) is uncommon in children. When it does occur, extensive investigations are often required to determine the underlying cause. We present a unique case of a 17-year-old previously healthy male adolescent with a history of allergic rhinitis, who initially presented with pneumonia in the setting of influenza A. He subsequently developed DAH, prompting further diagnostic evaluations that ultimately revealed a rare condition with long-term morbidity.

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