Within this tri-layer epithelium of gynaecomastia lesions, CK5/6 and CK14 are commonly expressed, 67% and 21% respectively in the inner luminal layer, 6% and 1% respectively in the intermediate luminal layer, and 84% and 99% respectively in the outer myoepithelial layer2. Here, KRT14 is linked to Gynecomastia.