Primary breast lymphoma in the right breast during treatment for left breast cancer.
BACKGROUND
Primary breast lymphoma is a rare condition, and distinguishing it from breast cancer is important because their treatments differ radically. Moreover, a recent report showed that mastectomy offered no benefit in the treatment of primary breast lymphoma.


METHODS
A 59-year-old woman was treated with adjuvant chemotherapy and local radiation after surgery for left breast cancer. She presented with a rapidly growing mass in the right breast at 20 months after surgery. Mammography and computed tomography revealed a massive tumour. She was diagnosed with primary breast lymphoma by aspiration cytology, and surgery was performed. Histopathological and immunohistochemical findings confirmed a diffuse large B-cell type primary breast lymphoma.


CONCLUSIONS
In this case, the lymphoma exhibited rapid growth despite chemotherapy for a malignancy in the contralateral breast. The patient had developed bronchiolitis obliterans organizing pneumonia due to radiation. Therefore, surgical treatment of the lymphoma was selected.
Nagata
Shigeyuki
S
Department of Surgery, Oita Red Cross Hospital, Oita, Japan. ngkkd637@yahoo.co.jp.
Nishimura
Ataru
A
Iwashita
Yukio
Y
Kinoshita
Tadahiko
T
Fukuzawa
Kengo
K
Tashiro
Hideya
H
Wakasugi
Kenzo
K