Differences in prognostic factors and patterns of failure between invasive micropapillary carcinoma and invasive ductal carcinoma of the breast: Matched case-control study
The Breast, 03/25/2010
Clinical Article
Yua JI et al. – This study was designed to identify differences in prognostic factors and patterns of failure between invasive micropapillary carcinoma (IMPC) and invasive ductal carcinoma (IDC) in patients with breast cancer. This study showed that IMPC is associated with LVI, ECE, high nuclear grade, and a greater degree of loco-regional recurrence, especially in the axilla and supraclavicular areas. Therefore, axillary and supraclavicular radiation therapy should be considered in IMPC patients with axillary node metastasis.
Methods- Identified 72 cases of IMPC who were diagnosed between 1999 and 2007 at the Samsung Medical Center
- Patients were matched with 144 controls who were diagnosed with IDC during same period
- Exact matches made for age (± 3 years), pathologic tumour and node stage, and treatment methods (surgery and radiation therapy)
- Median follow-up period was 45 months (13–116) for IMPC and 50 months (16–122) for IDC
- Lymphovascular invasion (LVI), axillary lymph node extracapsular extension (ECE) and high nuclear grade were more frequently detected in patients with IMPC
- During follow-up period, treatment failed in 15 IMPC patients (20.8%) and in 26 IDC patients (18.1%)
- Loco-regional recurrences developed in 11 IMPC patients (15.3%) and eight IDC patients (5.6%)
- Of 57 IMPC patients who had positive axillary nodes, seven patients (12.3%) had axilla and/or supraclavicular recurrence
