The main areas of interest include the study of histochemistry and cell biology of tumors either induced by different carcinogens in special strains of animals and human tumors under different modalities of treatment. The approach of conducting these research activities is through different procedures including histo-cytochemical, immuno histochemical and electron microscopic techniques. Recently the introduction of the immunohistochemical study of tumor markers either in experimentally induced tumors and human tumors is going in its way.