What happened, in summary

A 46-year-old man with a heavy smoking history had months of increasing fatigue, low-grade fevers, cough, and occasional shortness of breath. Several courses of antibiotics did not resolve his symptoms. Imaging eventually showed a large left-lung mass extending toward the mediastinum.

Lung-function testing showed COPD, which had not previously been diagnosed. Bronchoscopy found a tumor in the left upper-lobe bronchus, and biopsy confirmed squamous cell carcinoma. The lung cancer was classified as Stage III.

An oncology team recommended chemoradiotherapy. He died 6 months after diagnosis from pneumonia complicated by COPD that did not respond to targeted antibiotics. His case illustrates how symptoms of COPD and infection can overlap with lung cancer and contribute to delayed recognition even in a relatively young patient.