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A 67-year-old man with a 20 pack-year smoking history presented to our hospital with a month-long persistent cough. Blood tests showed elevated serum tumour biomarkers including neuron-specific enolase and carcinoembryonic antigen up to 10-fold the normal range. CT examination of the chest and whole abdomen revealed a 5 cm mass located on the left upper lobe with diffuse metastasis in both lobes of the lung. In addition to the mass in the left upper lung lobe, we also observed extra lung tissue with notable interstitial markings and the …
LZ and QX are joint first authors.
LZ and QX contributed equally.
Contributors YZ contributes to conceptualisation, organisation and data collection. LZ and QX collected the clinical data and drafted the manuscript. NY and AL gave critical comments and suggestions. All authors approved the final version of the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
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