RESUMO
As "CSS" the authors name the left segment (1/3) of the transverse colon with the splenic angle and fixed segment of the left colon. The author's conclusion of a retrospective analysis upon 34 neoplasms situated in this colonic area is the fact that there are enough arguments to treat them as a unitary group. From the anatomic point of view these arguments are the common vessels and lymphatics reports, and from the clinical point of view these neoplasms have in common the symptomatology (generally the diagnostic is established later on) and a great tendency of a loco-regional invasion which generate severe complications. The surgical treatment with oncologic radical intervention is the same for any primary neoplasm localization (within the there segments of "CSS"). Multi-visceral resections are frequently necessary too.