Stage I Breast Cancer

This Phase III Trial evaluates whether breast conservation surgery and endocrine therapy results in a non-inferior rate of invasive or non-invasive ipsilateral breast tumor recurrence (IBTR) compared to breast conservation with breast radiation and endocrine therapy.

This research is being done to assess whether an exercise intervention with protein intake support vs a health education and support program will make it easier for women age 65 or older who are receiving chemotherapy for breast cancer to receive all of their planned chemotherapy according to schedule and at the planned dose.

The purpose of this research is to test whether participating in either a physical activity intervention or a series of educational classes will help to preserve exercise capability, heart function, brain-based activities (like memory), and quality of life. Participants will be randomized to 1 of 2 pathways: * First pathway consists of organized health workshops. These workshops are intended to provide information on topics such as proper nutrition, management of stress, sleep practices, and emphasis on a healthy lifestyle that may help the participants through cancer treatment. This pathway will also test whether stretching may help participants through cancer treatment. * Second pathway participants will take part in some unsupervised and some potentially supervised moderate activity sessions each week throughout participants' cancer treatment to take place either remotely or in person, depending on availability of facilities at the time visits are scheduled.

The purpose of this study is to find out whether Revaree Plus is effective at improving vaginal health for people who are having symptoms of vaginal dryness during breast cancer treatment.

The purpose of this study is to develop and test a new intervention to reduce depressive symptoms in post-treatment cancer participants.

The goal of this clinical trial is to learn if tattoos applied with Magic Ink is as safe as commercially available standard tattoo ink for the purpose of radiation in women with breast cancer undergoing radiation treatment. The main questions are: * Is the Magic Ink as safe as standard tattoo ink * Does Magic Ink continue to function and remain visible for radiation therapists during the treatment Participants will be consented and given a skin assessment. Once enrolled participants will be administered the Magic Ink tattoo instead of the standard tattoo ink in preparation for their radiation treatment. Participants will also complete a survey regarding body image. Skin assessment will occur again after the first week of radiation and at 3 months later. Throughout the radiation therapy the medical physicist will complete surveys about ease of set-up of the equipment.

There are controversies about breast implant-based reconstruction techniques. Our center pioneered single-port insufflation endoscopic nipple-sparing mastectomy (SIE-NSM) combined with stage I prosthesis reconstruction. The study's primary objective is to compare single-port endoscopic NSM combined with pre-pectoral breast reconstruction to the subpectoral breast reconstruction group regarding breast satisfaction. This study is an ambispective cohort study. The study will be conducted at Beijing Friendship Hospital, affiliated with Capital Medical University. Patients will be enrolled retrospectively from January 2014 to March 2022 by reviewing the medical records and recruited prospectively from March 2022 to March 2025. The two cohorts are the pre-pectoral breast reconstruction cohort and the subpectoral breast reconstruction cohort, both following single-port insufflation endoscopic nipple-sparing mastectomy. The primary outcome of this study is postoperative breast satisfaction, which the BREAST-Q score will measure. The different variables will be compared using the Χ2 test for categorical variables and the Mann-Whitney test for continuous variables.