The formation of a break on the skin or on the surface of an organ. An ulcer forms when the surface cells die and are cast off.Ulcers may be associated with cancer and other diseases.
ULCERATION
Meaning of ULCERATION in English
NCI English Dictionary of Cancer Terms. Английский словарь раковых терминов NCI(Национальный институт злокачественных новообразований). 2012