What does this research mean for the field?

Diffuse alveolar hemorrhage in a previously healthy adolescent can be caused by a rare underlying condition that leads to long-term morbidity. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To investigate the rare occurrence of diffuse alveolar hemorrhage in a previously healthy adolescent with pneumonia.

February 21, 2026PEDIATRICS0 citations

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

CWChristina E. WellsSUNY Downstate Health Sciences University HCHyung-Gyo ChoNorthwestern University SGSai Sravya GudeSUNY Downstate Health Sciences University

Key Points

To investigate the rare occurrence of diffuse alveolar hemorrhage in a previously healthy adolescent with pneumonia.
Case report of a 17-year-old male with a history of allergic rhinitis and pneumonia due to influenza A.
Extensive diagnostic evaluations were conducted following the development of hemoptysis and DAH.
The investigation revealed a rare underlying condition associated with long-term morbidity.
The case highlights the complexity of diagnosing DAH in adolescents with pneumonia.

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

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