Clinical Report: Initial Presentation of Lung Cancer as Secondary Spontaneous Pneumothorax

Overview

This report details a rare case of lung adenocarcinoma presenting as secondary spontaneous pneumothorax (SSP) in a 55-year-old male with a significant smoking history. The case emphasizes the diagnostic challenges and the importance of maintaining a high index of suspicion for malignancy in similar presentations.

Background

Secondary spontaneous pneumothorax (SSP) is an uncommon but critical manifestation of lung cancer, often misdiagnosed as benign conditions. The incidence of SSP as a presenting symptom of lung cancer is estimated to be between 0.03% and 0.05%. Recognizing SSP as a potential indicator of underlying malignancy is essential for timely diagnosis and management.

Data Highlights

No numerical or trial data provided in the article.

Key Findings

• A 55-year-old male with a 60 pack-year smoking history presented with acute right-sided chest pain.
• Initial imaging revealed a right-sided pneumothorax with multiple bilateral bullae but no identifiable solid lesions.
• Intraoperative findings showed multiple bullae, with histopathology revealing a 6mm infiltrating lung adenocarcinoma.
• The patient declined further staging or radical resection but remained recurrence-free at 16 months postoperatively.
• High-resolution computed tomography (HRCT) may miss early-stage lung cancer in patients with SSP.
• Intraoperative frozen section analysis is recommended to prevent delayed diagnosis in high-risk populations.

Clinical Implications

Clinicians should maintain a high suspicion for lung cancer in patients presenting with SSP, especially in those with significant smoking histories. Intraoperative assessments may be crucial for early detection of malignancies that are not visible on imaging.

Conclusion

This case underscores the need for vigilance in diagnosing lung cancer in patients with SSP, as early-stage malignancies can present with atypical symptoms and imaging findings.

Related Resources & Content

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8. https://academic.oup.com/ejcts/article/doi/10.1093/ejcts/ezae189/7682526
9. https://bmcsurg.biomedcentral.com/counter/pdf/10.1186/s12893-025-03157-4.pdf
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