phyllodes tumor of the breast: 307 treated cases, the largest mexican experience at a single breast disease institution

background: phyllodes tumor (pt) of the breast in hispanic patients is more frequently reported with large tumors and with more borderline/malignant subtypes compared with other populations. the objective of this study was to describe characteristics of patients with pt and to identify differences among subtypes in a mexican population.  methods: a retrospective study was conducted on patients with pt. sociodemographic, histopathologic, and treatment characteristics were compared among subtypes, including only surgically treated cases due the complete surgical-specimen study requirement for appropriate who classification.  results: during 10 years, 346 pt were diagnosed; only 307 were included (305 patients), with a mean age of 41.7 yr. self-detected lump took place in 91.8%, usually discovered 6 months previously, with median tumor size of 4.5 cm. local wide excisions were done in 213 (69.8%) and mastectomies in 92 (30.1%). immediate breast reconstruction took place in 38% and oncoplastic procedures in 23%. pt were classified as benign in 222 (72.3%) cases, borderline in 50 (16.2%), and malignant in 35 (11.4%), with pathological tumor size of 4.2, 5.4, and 8.7 cm, respectively (p