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The role of oxygen in tumor response to therapy has been studied for several decades. We describe a technique that allows in vivo measurement of oxygen in tumors using computed tomography to guide probes. In the evaluation of 16 tumors, oxygen tensions were found to be substantially lower than surrounding tissue and varied nonrandomly. This technique has allowed construction of detailed tumor oxygen level maps.

Hypothesis: Resection of the nipple-areolar complex (NAC) for central breast cancers that involve the nipple or areola, with postoperative radiation therapy, adheres to the oncologic principles established for breast conservation surgery of other breast cancers. Good or excellent cosmetic results can be achieved. The rate of ipsilateral breast recurrence will be similar to that seen with peripheral breast cancers. The indications for breast conservation surgery can be safely extended to include patients with breast cancers that involve the NAC.Design: Retrospective medical record review; follow-up patient questionnaire.Setting: Community teaching hospital.Patients: Fifteen patients, aged 46 to 88 years, whose central breast cancers involved the NAC precluding preservation of the NAC.

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This communication reports four patients treated with the anthracycline adriamycin and irradiation either concurrently or sequentially, who demonstrated apparent augumentation of radiation reactions. Two of these patients demonstrated the so-called "recall" phenomenon.