Hard, painless lumps, of the size of a filbert, are often found in the breast, sometimes several being present in the same individual. These are simply fibrous tumors, and need not give rise to any apprehension, as they rarely, if ever, become larger than the size mentioned, and usually disappear of themselves, especially if the breast is frequently called into functional activity by nursing. As these growths give rise to no inconvenience of any sort, no treatment is required.