VOPP1 and squamous cell carcinoma: TMEM207 has high protein homology to the vesicular overexpressed in cancer pro‐survival protein 1 (VOPP1) 28, 29, which acts as an oncogenic factor in tobacco‐related human squamous cell carcinoma; the encoding gene is located on human chromosome 7p11.2, which is often amplified in human squamous cell carcinoma 28.