Squamous cell carcinoma is also known to arise at the lip vermillion in those who smoke, right at the location where a person holds the smoking device, such as a cigarette or pipe.

研究发现，鳞状细胞癌也可发生于的唇红，部位恰在叼着具（如或斗）的地方。

And so if we assume that all of these women have nipple cancer at the nipple, which is not the most common location of breast cancer, most common breast cancers appear in the upper outer quadrant of the breast.

因此，如果我们假设所有些女性的乳头癌都发生在乳头，而实际上乳头并不是乳腺癌最常见的发病部位，大多数乳腺癌实际上发生在乳房的外上象限。