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Malignant Epithelial Transformation in Phyllodes Tumor: A Population-Based Case Series
Background Phyllodes tumor (PT) of the breast is an uncommon fibroepithelial neoplasm. Malignant epithelial transformation in PT is rare. This study reports clinicopathologic characteristics and outcomes of patients with malignant epithelial transformation in PT. Methods From an institutional databa...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Cureus
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5752221/ https://www.ncbi.nlm.nih.gov/pubmed/29312836 http://dx.doi.org/10.7759/cureus.1815 |
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author | Widya, Ralph L Rodrigues, Myra F Truong, Pauline T Watson, Peter H Weir, Lorna M Knowling, Margaret A Wai, Elaine S |
author_facet | Widya, Ralph L Rodrigues, Myra F Truong, Pauline T Watson, Peter H Weir, Lorna M Knowling, Margaret A Wai, Elaine S |
author_sort | Widya, Ralph L |
collection | PubMed |
description | Background Phyllodes tumor (PT) of the breast is an uncommon fibroepithelial neoplasm. Malignant epithelial transformation in PT is rare. This study reports clinicopathologic characteristics and outcomes of patients with malignant epithelial transformation in PT. Methods From an institutional database of 183 patients with newly diagnosed PT referred to a Canadian provincial cancer institution between 1999 and 2014, 11 cases of PT with concomitant in situ or invasive carcinoma were identified. Descriptive analysis was performed to document the characteristics, treatment and outcomes of this cohort. Results Prevalence of malignant epithelial transformation in PT was 6.0%. Median (range) age was 54 (35–75) years. Types of carcinoma were ductal carcinoma in situ (DCIS) (n = 6), lobular carcinoma in situ (n = 4), and invasive ductal carcinoma (IDC) (n = 1). Median PT size was 5 (1–15) cm. Three PTs were classified as benign (27%), five as borderline (45%), and three as malignant (27%). Mastectomy was performed in six (55%) and breast conserving surgery in five (45%) patients. Hormonal therapy was used in two cases: one with a 1 cm, grade 2 DCIS, and one with an 11 cm, grade 1 IDC, the latter also receiving radiotherapy. Mean follow-up duration was 54 (6–175) months. None of the cases showed any evidence of disease after treatment at the time of their last follow-up. Conclusion This case series showed a higher prevalence of malignant epithelial transformation in PT than reported in previous literature. Outcomes were favourable despite the presence of either in situ or invasive carcinoma within PT. |
format | Online Article Text |
id | pubmed-5752221 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Cureus |
record_format | MEDLINE/PubMed |
spelling | pubmed-57522212018-01-08 Malignant Epithelial Transformation in Phyllodes Tumor: A Population-Based Case Series Widya, Ralph L Rodrigues, Myra F Truong, Pauline T Watson, Peter H Weir, Lorna M Knowling, Margaret A Wai, Elaine S Cureus Oncology Background Phyllodes tumor (PT) of the breast is an uncommon fibroepithelial neoplasm. Malignant epithelial transformation in PT is rare. This study reports clinicopathologic characteristics and outcomes of patients with malignant epithelial transformation in PT. Methods From an institutional database of 183 patients with newly diagnosed PT referred to a Canadian provincial cancer institution between 1999 and 2014, 11 cases of PT with concomitant in situ or invasive carcinoma were identified. Descriptive analysis was performed to document the characteristics, treatment and outcomes of this cohort. Results Prevalence of malignant epithelial transformation in PT was 6.0%. Median (range) age was 54 (35–75) years. Types of carcinoma were ductal carcinoma in situ (DCIS) (n = 6), lobular carcinoma in situ (n = 4), and invasive ductal carcinoma (IDC) (n = 1). Median PT size was 5 (1–15) cm. Three PTs were classified as benign (27%), five as borderline (45%), and three as malignant (27%). Mastectomy was performed in six (55%) and breast conserving surgery in five (45%) patients. Hormonal therapy was used in two cases: one with a 1 cm, grade 2 DCIS, and one with an 11 cm, grade 1 IDC, the latter also receiving radiotherapy. Mean follow-up duration was 54 (6–175) months. None of the cases showed any evidence of disease after treatment at the time of their last follow-up. Conclusion This case series showed a higher prevalence of malignant epithelial transformation in PT than reported in previous literature. Outcomes were favourable despite the presence of either in situ or invasive carcinoma within PT. Cureus 2017-11-03 /pmc/articles/PMC5752221/ /pubmed/29312836 http://dx.doi.org/10.7759/cureus.1815 Text en Copyright © 2017, Widya et al. http://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Oncology Widya, Ralph L Rodrigues, Myra F Truong, Pauline T Watson, Peter H Weir, Lorna M Knowling, Margaret A Wai, Elaine S Malignant Epithelial Transformation in Phyllodes Tumor: A Population-Based Case Series |
title | Malignant Epithelial Transformation in Phyllodes Tumor: A Population-Based Case Series |
title_full | Malignant Epithelial Transformation in Phyllodes Tumor: A Population-Based Case Series |
title_fullStr | Malignant Epithelial Transformation in Phyllodes Tumor: A Population-Based Case Series |
title_full_unstemmed | Malignant Epithelial Transformation in Phyllodes Tumor: A Population-Based Case Series |
title_short | Malignant Epithelial Transformation in Phyllodes Tumor: A Population-Based Case Series |
title_sort | malignant epithelial transformation in phyllodes tumor: a population-based case series |
topic | Oncology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5752221/ https://www.ncbi.nlm.nih.gov/pubmed/29312836 http://dx.doi.org/10.7759/cureus.1815 |
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