An analysis of 68 invasive lobular breast cancer cases in clinicopathological characteristics and the prognostic determinants / 中华外科杂志

ABSTRACT

Objective@#To study the clinicopathological characteristics and the prognostic determinants of the invasive lobular carcinoma breast cancer.@*Methods@#This was a retrospective single-center study of invasive lobular breast cancer cases diagnosed from January 2008 to December 2014 at Peking University First Hospital Breast Disease Center. The study enrolled 68 invasive lobular breast cancer patients, which represented 3.64% (68/1 870) of total invasive breast cancer. The median age of all selected patients was 46 years ranging from 36 to 83 years. All patients were restaged based on the 8th edition of AJCC cancer staging system and follow-up data including disease-free survival (DFS) and overall survival (OS) were analyzed to explore the prognostic determinants. The 5-year OS and DFS were calculated using Kaplan-Meier method; the significance of correlations between clinicopathological features and prognostic factors was estimated using log-rank test.@*Results@#There were significant differences in OS between patients with different anatomic stage, prognostic stage, lymph node metastasis, progesterone receptor (PR) expression, lymphvascular invasion and perineural invasion (χ2 4.318 to 32.394, all P<0.05); significant differences in DFS were also observed between patients with different anatomic stage, prognostic stage, lymph node metastasis, PR expression, human epidermal growth factor receptor-2 expression, Ki-67 level, histological grade and lymphvascular invasion (χ2 4.347 to 27.369, all P<0.05). Prognostic stages of 52.9% patients changed compared with anatomic stage, among which Luminal subtype mainly downstaged (22/30), however, triple negative subtype mainly upstaged (6/6).@*Conclusions@#Anatomic stage, prognostic stage, lymph node metastasis, PR expression, lymphvascular invasion are the prognostic factors of invasive lobular breast cancer. Regard to invasive lobular breast cancer patients, clinicians should pay close attention to the differences between prognostic stage and anatomic stage.