Up to 15% of patients with secondary brain tumors of unknown primary are admitted to a neurosurgery department. Identification of a primary tumor site on the basis of surgical material immunophenotyping in routine clinical practice has a significant potential; however. this requires systematization. Objective: to detect the primary focus of brain carcinoma. https://www.kerrenneur.com/product-category/food-service-food-serviceother-restaurant-industrialrestaurant-business/