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.bekindtopets.com/hot-mega-Allflex-840-USDA-HDX-EID-Tags-20-Bag-save-big/