Yanagawa Takehiro, Mitsuyoshi Ayumu, Kikumori Kaori, Hori Ami, Oshima Kazuteru, Katsuyama Shinsuke, Shinke Go, Ikeshima Ryo, Hiraki Masayuki, Ohmura Yoshiaki, Sugimura Keijiro, Masuzawa Toru, Hata Taishi, Takeda Yutaka, Murata Kohei
Dept. of Breast Surgery, Kansai Rosai Hospital.
Gan To Kagaku Ryoho. 2022 Dec;49(13):1748-1750.
A 28-year-old woman realized a left breast tumor. Mammography and ultrasonography revealed focal asymmetric density on the MI area(category 3)and a low-echoic 10 mm tumor with unclear boundaries. We performed an US-guided breast biopsy to confirm the diagnosis. The histopathological examination result suspected nodular fasciitis; however, borderline phyllodes tumor cannot be denied. Tumorectomy was performed under general anesthesia. The final histopathological examination revealed nodular fasciitis due to amplifying fibroblasts with irregular directions. Nodular fasciitis is a benign lesion and sometimes disappears spontaneously. Tumorectomy is often needed to confirm the diagnosis that cannot be identified by needle biopsy. We report a case of breast nodular fasciitis needed to differentiate from borderline phyllodes tumor.
