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Figure 1: Squamous cell carcinoma positive for p40. (a) Lacking expression of thyroid transcription factor; (b) immunohistochemistry (magnifications, × 40)
mutations have been found to be more common in female
patients, never-smokers, and patients of Asian ethnicity
irrespective of histology. In conclusion, EGFR testing
should be tested in patients with squamous cell lung cancer,
especially in females, never smokers, Asian ethnicity and
squamous histology diagnosed on small biopsy.

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Conflicts of interest
There are no conflicts of interest.

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Journal of Cancer Metastasis and Treatment ¦ Volume 2 ¦ July 20, 2016 ¦