Complications Arising in the Oral Cavity after Polychemotherapy in Patients with Hemablastoses

Abstract

Today it is believed that cancer does not appear immediately, but "is the last link in a long chain of preceding changes that can be call them precancerous or precancerous." This postulate formulates the first law of malignant oncology: every cancer has its own precancer, but not every precancer turns into cancer. Precancerous conditions, the presence of which is now generally recognized, are divided into obligate and facultative (Beck, 1933). The former go wrong in 80-85% of cases, the latter in 15-20%. Despite the significant variety of precancerous lesions of the skin and mucous membrane, they are expressed by some common morphological signs. These are parakeratosis, hyperkeratosis and other dyskeratotic phenomena. Using this feature of precancerous (and even more so cancerous tumors), it is possible to identify them at a more or less early date, using appropriate diagnostic methods. Methods of diagnosis of precancerous and malignant tumors: stomatoscopy, cytological examination (by puncture, scraping, flushing) and histological (urgent and planned biopsy).