Cancer of the trunk is rather uncommon, although the most frequent site is around the shoulders. In this locality the majority of growths are of basal-celled origin, and do not metastasize. Upon other portions of the body prickle-celled growths predominate, and they should always be removed, together with the draining glands, by a block operation, as otherwise recurrence is very apt to follow.
About the breast we may find Paget's disease of the nipple or a carcinoma en cuirasse. The latter is very rare, but must be thought of when nodules appear upon the skin in the vicinity of the mammary gland.