Journal of Pathology and Translational Medicine

Original Articles

Clinicopathologic characteristics of HER2-positive pure mucinous carcinoma of the breast: Yunjeong Jang, Hera Jung, Han-Na Kim, Youjeong Seo, Emad Alsharif, Seok Jin Nam, Seok Won Kim, Jeong Eon Lee, Yeon Hee Park, Eun Yoon Cho, Soo Youn Cho; J Pathol Transl Med. 2020;54(1):95-102. Published online November 13, 2019; DOI: https://doi.org/10.4132/jptm.2019.10.24

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Background
Pure mucinous carcinoma (PMC) is a rare type of breast cancer, estimated to represent 2% of invasive breast cancer. PMC is typically positive for estrogen receptors (ER) and progesterone receptors (PR) and negative for human epidermal growth factor receptor 2 (HER2). The clinicopathologic characteristics of HER2-positive PMC have not been investigated.
Methods
Pathology archives were searched for PMC diagnosed from January 1999 to April 2018. Clinicopathologic data and microscopic findings were reviewed and compared between HER2-positive PMC and HER2-negative PMC. We also analyzed the differences in disease-free survival (DFS) and overall survival according to clinicopathologic parameters including HER2 status in overall PMC cases.
Results
There were 21 HER2-positive cases (4.8%) in 438 PMCs. The average tumor size of HER2-positive PMC was 32.21 mm (± 26.55). Lymph node metastasis was present in seven cases. Compared to HER2-negative PMC, HER2-positive PMC presented with a more advanced T category (p < .001), more frequent lymph node metastasis (p = .009), and a higher nuclear and histologic grade (p < .001). Microscopically, signet ring cells were frequently observed in HER2-positive PMC (p < .001), whereas a micropapillary pattern was more frequent in HER2-negative PMC (p = .012). HER2-positive PMC was more frequently negative for ER (33.3% vs. 1.2%) and PR (28.6% vs. 7.2%) than HER2-negative PMC and showed a high Ki-67 labeling index. During follow-up, distant metastasis and recurrence developed in three HER2-positive PMC patients. Multivariate analysis revealed that only HER2-positivity and lymph node status were significantly associated with DFS.
Conclusions
Our results suggest that HER2-positive PMC is a more aggressive subgroup of PMC. HER2 positivity should be considered for adequate management of PMC.

Citations

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Poor response of HER2-positive mucinous carcinomas of breast to neoadjuvant HER2-targeted therapy: A study of four cases
Min Han, Daniel Schmolze, Javier A. Arias-Stella, Christina H. Wei, Joanne Mortimer, Fang Fan
Annals of Diagnostic Pathology.2025; 74: 152396. CrossRef
Comprehensive Immunohistochemical Analysis of Mesonephric Marker Expression in Low-grade Endometrial Endometrioid Carcinoma
Yurimi Lee, Sangjoon Choi, Hyun-Soo Kim
International Journal of Gynecological Pathology.2024; 43(3): 221. CrossRef
Clinicopathological characteristics of mucinous breast cancer: a retrospective analysis of a 6-years study from national cancer center in Vietnam
Thi Huyen Phung, Thanh Tung Pham, Huu Thang Nguyen, Dinh Thach Nguyen, Thanh Long Nguyen, Thi Hoai Hoang
Breast Cancer Research and Treatment.2024;[Epub] CrossRef
Clinicopathological features and prognosis of mucinous breast carcinoma with a micropapillary structure
Beibei Yang, Menglu Shen, Bo Sun, Jing Zhao, Meng Wang
Thoracic Cancer.2024;[Epub] CrossRef
Pure Mucinous Carcinoma of the Breast: Radiologic-Pathologic Correlation
Cherie M Kuzmiak, Benjamin C Calhoun
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Wei-Sen Yang, Yang Li, Ya Gao
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Janice N. Thai, Melinda F. Lerwill, Shinn-Huey S. Chou
RadioGraphics.2023;[Epub] CrossRef
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Hyun Hee Koh, Eunhyang Park, Hyun-Soo Kim
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Yurimi Lee, Kiyong Na, Ha Young Woo, Hyun-Soo Kim
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Ivana Mijatov, Aleksandra Fejsa Levakov, Aleksandar Spasić, Jelena Nikolić, Saša Mijatov
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Endometrioid Carcinomas of the Ovaries and Endometrium Involving Endocervical Polyps: Comprehensive Clinicopathological Analyses
Jihee Sohn, Yurimi Lee, Hyun-Soo Kim
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HER2 positive mucinous carcinoma of breast with micropapillary features: Report of a case and review of literature
Dinesh Chandra Doval, Rupal Tripathi, Sunil Pasricha, Pankaj Goyal, Chaturbhuj Agrawal, Anurag Mehta
Human Pathology: Case Reports.2021; 25: 200531. CrossRef
Carcinoma mucosecretor de mama HER2-positivo, un caso clínico
A.M. González Aranda, E. Martínez Gómez, A. Santana Costa, F. Arnanz Velasco, M.H. González de Diego, A. Zapico Goñi
Clínica e Investigación en Ginecología y Obstetricia.2021; 48(4): 100685. CrossRef
Clinicopathologic features of unexpectedly HER2 positive breast carcinomas: An institutional experience
Carissa LaBoy, Kalliopi P. Siziopikou, Lauren Rosen, Luis Z. Blanco, Jennifer L. Pincus
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Sujin Park, Go Eun Bae, Jiyoung Kim, Hyun-Soo Kim
Diagnostics.2021; 11(8): 1450. CrossRef
Mesonephric-like Adenocarcinoma of the Uterine Corpus: Comprehensive Immunohistochemical Analyses Using Markers for Mesonephric, Endometrioid and Serous Tumors
Hyunjin Kim, Kiyong Na, Go Eun Bae, Hyun-Soo Kim
Diagnostics.2021; 11(11): 2042. CrossRef

The Prognostic Impact of Synchronous Ipsilateral Multiple Breast Cancer: Survival Outcomes according to the Eighth American Joint Committee on Cancer Staging and Molecular Subtype: Jinah Chu, Hyunsik Bae, Youjeong Seo, Soo Youn Cho, Seok-Hyung Kim, Eun Yoon Cho; J Pathol Transl Med. 2018;52(6):396-403. Published online October 23, 2018; DOI: https://doi.org/10.4132/jptm.2018.10.03

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Abstract PDF

Background
In the current American Joint Committee on Cancer staging system of breast cancer, only tumor size determines T-category regardless of whether the tumor is single or multiple. This study evaluated if tumor multiplicity has prognostic value and can be used to subclassify breast cancer.
Methods
We included 5,758 patients with invasive breast cancer who underwent surgery at Samsung Medical Center, Seoul, Korea, from 1995 to 2012.
Results
Patients were divided into two groups according to multiplicity (single, n = 4,744; multiple, n = 1,014). Statistically significant differences in lymph node involvement and lymphatic invasion were found between the two groups (p < .001). Patients with multiple masses tended to have luminal A molecular subtype (p < .001). On Kaplan-Meier survival analysis, patients with multiple masses had significantly poorer disease-free survival (DFS) (p = .016). The prognostic significance of multiplicity was seen in patients with anatomic staging group I and prognostic staging group IA (p = .019 and p = .032, respectively). When targeting patients with T1-2 N0 M0, hormone receptor–positive, and human epidermal growth factor receptor 2 (HER2)–negative cancer, Kaplan-Meier survival analysis also revealed significantly reduced DFS with multiple cancer (p = .031). The multivariate analysis indicated that multiplicity was independently correlated with worse DFS (hazard ratio, 1.23; 95% confidence interval, 1.03 to 1.47; p = .025). The results of this study indicate that tumor multiplicity is frequently found in luminal A subtype, is associated with frequent lymph node metastasis, and is correlated with worse DFS.
Conclusions
Tumor multiplicity has prognostic value and could be used to subclassify invasive breast cancer at early stages. Adjuvant chemotherapy would be necessary for multiple masses of T1–2 N0 M0, hormone-receptor-positive, and HER2-negative cancer.

Citations

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Brief Case Report

Metastatic Squamous Cell Carcinoma from Lung Adenocarcinoma after Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitor Therapy: Hyung Kyu Park, Youjeong Seo, Yoon-La Choi, Myung-Ju Ahn, Joungho Han; J Pathol Transl Med. 2017;51(4):441-443. Published online April 4, 2017; DOI: https://doi.org/10.4132/jptm.2016.10.18

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