Histochemical analysis of mucopolysaccharides occurring in mucus-producing tumors; mixed tumors of the parotid gland, colloid carcinomas of the breast, and myxomas.

ECENT ADVANCES in histochemical techR niques have stimulated interest in the inicroscopic differentiation of various mucopolysaccharides. Following a previous studyLo on the analysis of mucoid substances in normal tissue, the present paper deals with the application of some of the newer methods to the examination of pathological material. For this purpose, three types of niucus-contaiiiing tumors were selected, namely, mixed tuniors of the parotid gland, colloid carcinoma of the breast, and myxomatous tumors of benign and malignant character. I t was hoped that knowledge of the histochemical behavior of mucoid substances in these tumors might throw further light on their nature and histogenesis.