the method differs from the chemosurgical techniques used for excision of cutaneous carcinomas in the following two respects : the tissues always are chemically fixed in situ before any incisions are made in order to minimize the chance of dissemination , and an extra margin of tissues is removed after reaching a microscopically melanoma-free plane in order to encompass possible outlying melanomatous satellites in the peritumoral lymphatics .
C0040300
tissues
C0025202
free