Objectives Describe the presentation characteristics of ACC in the Mexican population at the Breast Disease Institute from 2007 to 2019.

Methods Observational, descriptive, case series, of Breast Disease Institute FUCAM ® patients.

Results A case series was recorded with 9 patients with ACC (table 1), representing 0.5% of our breast cancer cases. With an average age of presentation of 63 years. Grade III was presented in 66.6%. The mean tumor size was 4.8 cm, while the mean tumor size in the surgical specimen was 2.5 cm, in 88.8% in early stages. All with triple negative breast cancer (TNBC) (table 2), one case (5%) with lymph node involvement with Axillary lymph node dissection (ALND). In a case of Breast conserving surgery (BCS) with Intraoperative radiation therapy (IORT) with Intrabem, two cases with modified radical mastectomy (MRM), 66% with total mastectomy (MT) and sentinel node biopsy (SLNB). In 55% of the cases, adjuvant chemotherapy taxane-based. While 44.4% were indicated radiotherapy, with an average disease-free period of 63 months.

Conclusions So we consider that our contribution can answer some questions of ACC in the population Mexican. We present our 12-year institutional experience with 9 cases. Our results are similar to the published series, however there is controversy for treatment with adjuvant.