PTPN13 and head and neck squamous cell carcinoma: The Y2081D Tyr2081Asp (T > G), rs989902 (rs for SNP reference), in exon 39, near the PTPN13 phosphatase domain [137], is associated with colorectal cancer in Polish patients (relative risk compared to the “wild-type” genotype: 2.087) [138], and with HNSCC in American patients (Odds Ratio, OR, =1.26) [139].