Fortunately, though, about 80 percent of such lumps are benign, or self - contained, many simply being fluid - filled sacks called cysts.
Õnneks siiski on umbes 80 protsenti sellistest tihenditest healoomulised ehk iseeneslikult taanduvad. Paljud neist on lihtsalt vedelikku sisaldavad õõned ehk tsüstid.