Lung cancer masquerading as COVID-19 in a young non-smoking woman: case report.

Introduction and importance: The clinical and radiological similarities between COVID-19 and lung cancer pose diagnostic challenges, particularly in young, non-smoking individuals. Ground glass opacities (GGO) on imaging, often associated with COVID-19, can also indicate lung cancer. Distinguishing between these conditions is crucial but complex, requiring a systematic approach. Case presentation: The authors present a case of a 31-year-old non-smoking woman initially suspected of COVID-19 due to cough, dyspnea, and GGO on chest CT. Despite negative RT-PCR and inconclusive bronchial aspiration, symptoms persisted, prompting further investigation. A PET scan revealed hypermetabolic consolidation, leading to a biopsy confirming adenocarcinoma. Clinical discussion: Lung cancer can mimic COVID-19 symptoms, complicating diagnosis, especially in young, non-smoking patients. While smoking remains the primary risk factor, lung cancer in non-smokers, particularly young individuals, is increasingly recognized. GGO, commonly associated with COVID-19, should prompt consideration of malignancy, emphasizing the importance of a comprehensive differential diagnosis. Conclusion: Early detection of lung cancer in young, non-smoking individuals is vital yet challenging. Clinicians should maintain a high index of suspicion, promptly investigating persistent or worsening symptoms, even in the absence of traditional risk factors. Timely biopsy and intervention are critical for improving outcomes in this population.