PAX5 is widely expressed in normal adult and embryonic tissues 10, as well as in some tumour tissues including oral squamous‐cell carcinoma and leukoplakia 11, superficial bladder transitional cell carcinoma 12 and some neuroendocrine tumours such as SCLC, large cell neuroendocrine carcinoma, and pulmonary carcinoid 13. Here, PAX5 is linked to neoplasm.