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HER2 Positive and HER2 Negative Classical Type Invasive Lobular Carcinomas: Comparison of Clinicopathologic Features.
- Source :
-
Current Oncology . Jun2021, Vol. 28 Issue 3, p1608-1617. 10p. - Publication Year :
- 2021
-
Abstract
- Human epidermal growth factor receptor 2 (HER2) positive (+) classical type invasive lobular carcinoma (cILC) of the breast is extremely rare and its clinicopathologic features have not been well characterized. We compared features of HER2(+) and HER2 negative (-) cILCs. A total of 29 cases were identified from the clinical database at our institution from 2011-2019; 9 were HER2(+) cILC tumors and 20 were HER2(-) cILC tumors. The results reveal that HER2(+) cILC group had significantly increased Ki-67 expression and reduced estrogen receptor (ER) expression compared to HER2(-) cILC group (both p < 0.05). In addition, HER2(+) cILCs tended to be diagnosed at a younger age and more common in the left breast, and appeared to have a higher frequency of nodal or distant metastases. These clinicopathologic features suggest HER2(+) cILC tumors may have more aggressive behavior than their HER2(-) counterpart although both groups of tumors showed similar morphologic features. Future directions of the study: (1) To conduct a multi-institutional study with a larger case series of HER2(+) cILC to further characterize its clinicopathologic features; (2) to compare molecular profiles by next generation sequencing (NGS) assay between HER2(+) cILC and HER2(-) cILC cases to better understand tumor biology of this rare subset of HER2(+) breast cancer; and (3) to compare molecular characteristics of HER2(+) cILC and HER2(+) high grade breast cancer in conjunction with status of tumor response to anti-HER2 therapy to provide insight to management of this special type of low grade breast cancer to avoid unnecessary treatment and related toxicity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LOBULAR carcinoma
*EPIDERMAL growth factor receptors
*BREAST cancer
Subjects
Details
- Language :
- English
- ISSN :
- 11980052
- Volume :
- 28
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Current Oncology
- Publication Type :
- Academic Journal
- Accession number :
- 151113596
- Full Text :
- https://doi.org/10.3390/curroncol28030150