O.V. Morov1, 2, R.Sh. Khasanov2
1Republican Clinical Oncology Dispensary named after Prof. M.Z. Sigal, Kazan
2Kazan State Medical Academy — Branch Campus of the FSBEI FPE RMACPE MOH Russia, Kazan
Morov O.V. — PhD (Medicine), radiation oncologist, Head of Day Hospital Department No. 2
29 Sibirskiy trakt, 420029 Kazan, tel.: +7 (843) 233-86-31, e-mail: morvaks@mail.ru, ORCID ID: 0009-0008-9241-6703
Abstract. The incidence of primary multiple malignant neoplasms is increasing worldwide. According to various studies, they account for approximately 2–8% of all malignant tumors. As life expectancy improves after successful treatment of cancer, the risk of developing additional primary malignancies rises. The literature review summarizes current concepts of primary multiple malignant neoplasms, discusses existing approaches to their definitions and registration rules, and analyzes risk factors, epidemiological patterns and the most frequent combinations of tumor sites.
Key words: incidence of malignant neoplasms, primary multiple malignant neoplasms, second primary tumors, risk factors.