Evaluation of the Management of Intracystic Papillary Carcinoma

Introduction > Intracystic papillary carcinoma is defined as papillary carcinoma located in a dilated or cystic duct. There is no consensus regarding the management of this lesion. The aim of our study is to evaluate the frequency of associated invasive lesions and the need to perform an axillary staging during surgery. Material and methods > This is a retrospective study concerning intracystic papillary carcinomas diagnosed at the Georges-Francois Leclerc Cancer Center between January 2010 and December 2021. Inclusion criteria were an age superior to 18 years and a histologic diagnosis confirmed at biopsy. Results > Fifty-nine patients were included in this study. All but one patient underwent surgery: 39 patients (67.2%) underwent lumpectomy, and 18 patients (31.1%) underwent total mastec-tomy. An axillary staging was performed in 51 patients (86.4%). On final histologic analysis, 31 patients (52.5%) had pure intracystic papillary carcinoma and/or associated with in situ and 27 patients (45.8%) had invasive and/or microinvasive lesions. After univariate analysis, the only variable significantly associated with the presence of invasive lesions on final histologic analysis was the palpation of the lesion with a P-value of 0.09. Discussion > Through this study, it appears necessary to discuss the realization of an axillary staging by conducting an axillary sentinel node procedure because of the high frequency of invasive lesions associated with intracystic papillary carcinoma.