[A case of malignant fibrous histiocytoma (MFH) which produced breast cancer after an operation].

The case reported here was a 40-year-old woman. She came to our hospital because we palpated on her left breast to locate a tumor. The clinical history showed a breast flabellate resection and lymphadenectomy for carcinoma of the left breast in 2000. The tumor was scirrhous type, and the histopathology diagnosis showed it to be T2N0M0 stage IIA, and the hormone receptor was ER (-), PgR (-). As an outpatient, we performed radiotherapy. In 2006, we confirmed a tumor on the right side under the left breast wounded area. We left the tumor without a treatment. However, the tumor had a tendency to grow in size and was Class V in aspiration biopsy cytology, and was diagnosed of sarcoma by needle biopsy. The patient was hospitalized in order to have a surgery. We performed a pectoralis muscle merger mastectomy and a chest wall restoration by latissimus dorsi muscle dermal flap in March 2007. Histopathology diagnosis revealed it to be malignant fibrous histiocytoma (MFH). At present, the patient has been treated as an outpatient. There has been neither recurrence nor a metastasis with the patient. The patient has recently been treated with radiotherapy for the remaining breast after a breast preservation surgery. We reported our case with a possibility of MFH occurrence in addition to some article considerations.