INTRODUCTION: According to the World Health Organization, breast cancer remains a pervasive global health problem, affecting millions of women each year and posing significant challenges to health systems worldwide. Understanding epidemiology and therapeutic methods, especially in regional contexts such as Croatia, is key to optimizing patient care. The cause of the disease is unknown, but there are risk factors such as family history, hormonal influence, lifestyle and exposure to radiation and certain chemicals. Early diagnosis, through regular mammography examinations and breast examinations alone, is crucial in increasing the chances of successful treatment and survival. OBJECTIVE: To retrospectively analyze age and types of surgical treatment. METHODS: The research was conducted at the Dubrava Clinical Hospital. Patients surgically treated at Dubrava Clinical Hospital diagnosed with breast cancer in the period from January 1, 2004. to December 31, 2023. were analyzed. RESULTS: 3710 patients were analyzed. The mean age is 57.41 ± 13.04 (95% CI 56.99 - 57.83). The median age is 57 years. 1728 spare kirs were made. of breast procedures, 1015 mastectomies without reconstruction, 363 mastectomies with tissue reconstruction and 604 mastectomies with prosthesis reconstruction. CONCLUSION: The hypothesis that the average age of patients operated on with a diagnosis of breast cancer is between 35 and 55 years was rejected, and that more sparing than radical surgical procedures were performed. The hypothesis that the number of surgical procedures for breast reconstruction with implants is greater than the number of reconstructions with own tissue has been accepted.