Breast cancer is a malignant and deadly disease for women. The high number deaths causes by breast cancer comes second after cerucal cancer, some of the risk factors of breast cancer are fast food or junk food and the lack of knowledge of the symptoms. The purpose of this study was to analyze the different of knowledge and history consumed fast food junk food between mother breast cancer first stadium and last stadium at Dr Kanudjoso Djatiwibowo Hospital, Balikpapan. The approach of this research was restrospective. The respondents consisted of 45 people individuals by using accidental sample technique. The data were obtained using questionniare, then analyzed using Chi square test and logistic regression test. The result with minimum knowledge were 25 (55.6%), who consumed fast food were 34 (75.6%), also there was a correlation between knowledge and breast cancer with p-value of 0.006. Based on the regression test, there was correlation between knowledge and breast cancer, with p-value of 0.04; while the p-value of the correlation between fast food and breast cancer was 0.264. The conclusion that the dominant factors of breast cancer was knowledge. There fore, health professionals, the agencies to give a socialization, giving information about breast health, to consume healthy food for our body as prevention of breast cancer. Keywords: knowledge; breast cancer

Background: Breast cancer is a frightening disease for women. The prevalence of breast cancer in Indonesia is 109 per 100,000 population. The most cancer in EastKalimantan in 2014 was breast cancer with 179 people and in 2015 it rose to 424 people, this case experienced an increase of 56.28%. Aims: The aim of the researchers was to implement breast self-examination health education counseling (BSE) with Android media on breast cancer prevention behavior in Balikpapan.  Method: This research method is a quasi-experimental study with a one-group pre-test and post-test design. The sample in this study was 2 groups of cadres totaling 50 people, each 25 people in the control group and 25 in the intervention group with ages 18-55 years. Results: The results of the study showed an increase in knowledge (good 48%, enough 40%, less 12%) and increased behavior about BSE (good 44%, enough 48%, less 8%), there was a difference in knowledge before and after being given BSE counseling using android media (p-value = 0.362). There are differences in behavior before and after being given the BSE counseling treatment using Android media (p-value = 0.607). Conclusion: Providing counseling using Android media provides better benefits.