BACKGROUND An anticipated poor cosmetic result has traditionally been deemed a relative contraindication for breast conservation therapy (BCT). We sought to determine whether a local rotational flap could achieve satisfactory cosmesis in patients who were anticipated to have a poor cosmetic result following standard segmental mastectomy but who nevertheless desired BCT. METHODS Within the past 3 years, nine patients were treated with BCT using local rotational flap techniques. Their records were reviewed for patient characteristics, pre- and postoperative treatment, disease-free status, and patient satisfaction with cosmesis. RESULTS The cosmetic outcome following a segmental mastectomy was anticipated to be unacceptable due to the following features: a large previous biopsy cavity with unknown or positive margins (three patients); initial large primary tumors with unknown extent of residual disease following induction chemotherapy (five patients); and pre-existing poor cosmesis (one patient). One patient had refused modified radical mastectomy and had satellitosis from inadequately treated primary tumor (excisional biopsy with positive margins and no further therapy). The median initial tumor size was 2.7 cm (range, 1.5 cm to 5.0 cm). Final resection margins were negative in all patients. Postoperative radiotherapy was given in seven patients; one patient did not receive radiotherapy because of a pre-lupus condition and one did not require radiotherapy because her pathologic diagnosis was Paget's disease without an invasive component. Cosmesis was judged to be good to excellent by eight of nine patients. The patient who refused mastectomy was dissatisfied with cosmesis because of mild asymmetry. With a median follow-up of 24 months, only one patient has developed a local recurrence. CONCLUSIONS Local rotational flaps composed of adjacent breast tissue are an acceptable method of achieving satisfactory cosmesis in selected patients who desire BCT.