A Case of Locally Recurrent Tubular Adenoma of the Breast that Developed in Postmenopausal\ 5 Years after Tumorectomy

Abstract

A 66-year-old woman was shown to have a right breast mass on a plain chest CT examination when she was hospitalized in our hospital for a peritonsillar abscess. Five years previously, she was diagnosed with a tubular adenoma of the right breast following tumorectomy elsewhere. She had not undergone further medical examinations since then. At our hospital, a mass with a smooth surface measuring 2 cm in diameter was palpable near the surgical scar. Mammography showed a circumscribed and partially indistinct mass in the right breast (area A). Ultrasonography revealed a clearly defined border and partially indistinct mass measuring 27 mm in the maximum diameter in the same area. Magnetic resonance imaging was significant for a mass with rim enhancement in the right breast. Recurrence of tubular adenoma was suspected based on a core needle biopsy ; however, we could not rule out a possibility of breast cancer considering the image findings and the fact that the mass appeared in such a short period of time. Therefore, we resected the breast mass surgically. The histopathologic diagnosis was local recurrence of tubular adenoma of the breast. We report a case of locally recurred tubular adenoma that developed in postmenopausal 5 years after tumorectomy.