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Updated: Jan 31, 2026

Endoscopic Approach for Colloid Cyst Resection
Published on: May 23, 2025
Invasive Colloid Carcinoma and the role of Ki-67 and HER2 - Two case reports
Sarvanand Patel1, Shiv Bhanu2, Nishi Mehta2
1Universty of Illinois College of Medicine at Chicago, 1835 W Polk St, Chicago, IL 60612, USA.
Abstract:
Mucinous carcinoma (also termed colloid carcinoma) of the breast accounts for 1%-6% of all breast cancer and is considered to have a good relative prognosis. The most common mammographic appearance of pure mucinous carcinoma is a high-density mass with circumscribed margins and on sonographic examination an isoechoic round mass with circumscribed margins. We report 2 cases of invasive mucinous carcinoma, in which one patient showed an intermediate recurrence risk based on Ki-67 and human epidermal growth factor receptor 2 negativity, while the other showed a low Ki-67 recurrence risk and human epidermal growth factor receptor 2 positive. We also review the literature on Ki-67 and human epidermal growth factor receptor 2 and explore the roles of these molecular markers in mucinous carcinomas.
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