Khadije Ganjivatan - Master's student in clinical Internal - surgery, Faculty of Nursing and Midwifery, Sabzevar University of Medical Sciences, Sabzevar, Iran
Mohsen Koshan - Instructor, School of Nursing and Midwifery Sabzevar University of Medical Sciences, Sabzevar, Iran.
Neda Magdavifar - PhD Student in Epidemiology, Department of Epidemiology & Biostatistics, School of public health, Tehran University of Medical Sciences, Tehran, Iran

Background: Breast cancer accounts for ۲۳% of all cancers in women and is the leading cause of death among women aged ۲۰ to ۵۹ worldwide. Because the breast is an important part of a woman's body image, any abnormality can lead to a negative body image as well as negative sexual self-efficacy in women. The aim of this study was to evaluate the level of sexual self-efficacy and image of the body after mastectomy and lumpectomy in Shahroud city and Golestan province. Method: This is a cross-sectional descriptive-analytical study. The study population was women with breast cancer undergoing mastectomy and lumpectomy in Shahroud and Gorgan. From both groups (mastectomy and lumpectomy), ۵۷ Patients were selected by convenience sampling method. Demographic information questionnaire, sexual self-efficacy questionnaire and body image questionnaire were used to collect data. Data were analyzed using SPSS statistical software. Quantitative variables were first evaluated for normality using the Spirovilk test, and in cases where the quantitative variable and distribution were normal, the independent t-test was used, and in case of abnormality, the Mann-Whitney test was used. Results: The research units were in the age range of ۱۵ to ۷۵ years and with an average age of ۴۸ years. The results showed that there was no significant relationship between the mean score of mastectomy ۰.۱۰۳ and sexual self-efficacy (P = ۰.۲۰۰) and lumpectomy ۰.۱۶۵ and sexual self-efficacy (P = ۰.۲۰۰). Also, there was no significant relationship between the mean score of mastectomy ۲۱.۶۷۶۵ and mental image of the body (P = ۰.۲۰۰) and lumpectomy ۲۵.۰۰۰۰ and mental image of body (P = ۰.۲۰۰). Conclusion: The results of this study show that there is no significant difference between the two groups in the variables of sexual self-efficacy and mental image of the body. There is a need for further investigation according to other variables.

Body image, Lumpectomy, Mastectomy, Sexual Self-Efficacy.