PCDH17 and breast carcinoma: On another note, breast cancer patients with wtCCND1 and unmethylated (unm) PCDH17 achieved higher pCR rate than those with CCND1 amp andmethylated (m) PCDH17 (13.8% (n=1) vs 2.7% (n=1) and 67.3% (n=1) vs 31.6% (n=1), respectively).