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Imai K, Nanjo H, Shigeeda W, Sugai T, Ito T, Maniwa Y, Takashima S, Saito H, Yanagawa N, Tanaka Y, Doi T, Hiroshima Y, Nomura K, Tanino M, Tanaka S, Minamiya Y. Intraoperative rapid immunohistochemistry with noncontact antibody mixing for undiagnosed pulmonary tumors. Cancer Sci 2023; 114:702-711. [PMID: 36282212 PMCID: PMC9899630 DOI: 10.1111/cas.15616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/05/2022] [Accepted: 10/07/2022] [Indexed: 11/29/2022] Open
Abstract
Knowledge of the histologic type and primary origin of pulmonary tumors is essential when preparing a surgical strategy. Intraoperative diagnosis of hematoxylin and eosin (H&E)-stained frozen sections is the gold standard, but reliable pathology requires time-consuming immunohistochemistry (IHC) to distinguish among histological types/organ origins and to analyze molecular status. The aim of this study was to evaluate the clinical reliability of a new rapid-IHC technique for intraoperative diagnosis of pulmonary tumors. In total, 169 patients with undiagnosed pulmonary tumors were enrolled in a multicenter prospective observational study. At three institutes, pulmonary tumor samples were collected through core needle biopsy and/or surgery to determine surgical strategies. Using a new device for rapid IHC, we applied a high-voltage, low-frequency alternating current (AC) field, which mixes the available antibody as the voltage is switched on/off. Rapid IHC can provide tumor histologic type/origin diagnoses within 20 min, as opposed to the 3-6 h required for conventional IHC. No false diagnoses of malignancy were rendered in any of the cases when using simple H&E staining. With H&E staining alone, the overall definitive diagnosis rate, the rate of defined tumor origin, and the rate of determined histological type were 76.92%, 85.80%, and 90.53%, respectively. When rapid IHC was added, those rates were significantly improved to 88.76%, 94.67%, and 91.72%, respectively. By providing prompt and accurate intraoperative histological/molecular analysis, rapid IHC driven by AC mixing could serve as an effective clinical tool guiding the surgical strategy for undiagnosed pulmonary tumors.
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Affiliation(s)
- Kazuhiro Imai
- Department of Thoracic Surgery, Akita University Graduate School of Medicine, Akita, Japan
| | - Hiroshi Nanjo
- Department of Pathology, Akita University Graduate School of Medicine, Akita, Japan
| | - Wataru Shigeeda
- Department of Thoracic Surgery, Iwate Medical University, Yahaba-cho, Japan
| | - Tamotsu Sugai
- Department of Molecular Diagnostic Pathology, Iwate Medical University, Yahaba-cho, Japan
| | - Tomoo Ito
- Department of Diagnostic Pathology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoshimasa Maniwa
- Division of Thoracic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Shinogu Takashima
- Department of Thoracic Surgery, Akita University Graduate School of Medicine, Akita, Japan
| | - Hajime Saito
- Department of Thoracic Surgery, Iwate Medical University, Yahaba-cho, Japan
| | - Naoki Yanagawa
- Department of Molecular Diagnostic Pathology, Iwate Medical University, Yahaba-cho, Japan
| | - Yugo Tanaka
- Division of Thoracic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takefumi Doi
- Division of Thoracic Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yuko Hiroshima
- Department of Pathology, Akita University Graduate School of Medicine, Akita, Japan
| | - Kyoko Nomura
- Department of Health Environmental Science and Public Health, Akita University Graduate School of Medicine, Akita, Japan
| | - Mishie Tanino
- Department of Diagnostic Pathology, Asahikawa Medical University Hospital, Asahikawa, Japan
| | - Shinya Tanaka
- Department of Cancer Pathology, Hokkaido University Faculty of Medicine, Sapporo, Japan.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Japan
| | - Yoshihiro Minamiya
- Department of Thoracic Surgery, Akita University Graduate School of Medicine, Akita, Japan
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Wnt Family Member 9b (Wnt9b) Is a Sensitive and Specific Marker for Triple-negative Breast Carcinoma Including Metaplastic Carcinoma. Am J Surg Pathol 2023; 47:47-54. [PMID: 36525542 DOI: 10.1097/pas.0000000000002001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Wnt9b was recently identified as a highly sensitive and specific marker for breast carcinomas. Due to the limited number of triple-negative breast carcinomas (TNBCs) in previous study, we further explored Wnt9b's utility in breast carcinoma, especially in TNBCs including metaplastic carcinomas. We systematically evaluated Wnt9b expression on tissue microarrays (TMAs) from 413 breast carcinomas, 208 urothelial carcinomas, 102 endometrial carcinomas, 109 cholangiocarcinomas, 192 ovarian carcinomas, 48 lung adenocarcinomas, 69 colorectal adenocarcinomas, and 78 melanomas, and whole tissue section (WTS) from 20 human epidermal growth factor receptor 2-positive, 34 nonmetaplastic TNBCs, and 67 invasive metaplastic carcinomas. The results showed Wnt9b was highly expressed in breast carcinomas (91% on TMA and 98% on WTS) and in nonmetaplastic TNBCs (91% on TMA and 97% on WTS), but almost completely negative in other tested tumor types. Wnt9b was also highly expressed in metaplastic carcinomas (80%), significantly higher than GATA3 (56%) and SOX10 (48%), but slightly lower than TRPS1 (90%). In summary, our results demonstrate that Wnt9b is a highly sensitive marker for breast carcinomas, including TNBCs and metaplastic carcinomas. Further, we compared its utility with other breast markers including TRPS1, GATA3, and SOX10 in metaplastic carcinomas.
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Khoury R, Bucau M, Bizot A, Khalil A. Breast metastasis of a lung carcinoma. BJR|CASE REPORTS 2022; 8:20210142. [PMID: 36177253 PMCID: PMC9499442 DOI: 10.1259/bjrcr.20210142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 11/03/2021] [Accepted: 11/30/2021] [Indexed: 11/16/2022]
Abstract
Breast metastasis is a rare phenomenon (0.2–1.3%)1 compared to primary breast lesions. Several neoplasms have been reported to metastasize to the breast such as melanoma, lymphoma and lung cancer. In this article, we report a case of breast metastasis of lung cancer confirmed by biopsy and immunohistochemistry with CT and ultrasound imaging.
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Affiliation(s)
- Ralph Khoury
- Radiology, Hopital Bichat-Claude-Bernard, Paris, France
| | - Margot Bucau
- Anatomo-Pathology Department, Hopital Bichat-Claude-Bernard, Paris, France
| | - Alexandra Bizot
- Thoracic-Oncology Department, Hopital Bichat-Claude-Bernard, Paris, France
| | - Antoine Khalil
- Radiology, Hopital Bichat-Claude-Bernard, Paris, France
- Paris University, Paris, France
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Wang B, Jiang Y, Li SY, Niu RL, Blasberg JD, Kaifi JT, Liu G, Wang ZL. Breast metastases from primary lung cancer: a retrospective case series on clinical, ultrasonographic, and immunohistochemical features. Transl Lung Cancer Res 2021; 10:3226-3235. [PMID: 34430360 PMCID: PMC8350075 DOI: 10.21037/tlcr-21-542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 07/19/2021] [Indexed: 11/21/2022]
Abstract
Background Lung cancer metastases to the breast are less common and consequently have received much less attention in clinical practice. The purpose of this study was to provide a better understanding of clinical, ultrasonographic, and immunohistochemical features of breast metastases from primary lung cancer. Methods This retrospective case series included patients with breast metastases from primary lung cancer between January 2012 and December 2020. Clinical features, ultrasonographic characteristics, and immunohistochemical findings were evaluated in this analysis. Results In all, 7 cases (mean ± standard deviation age: 57.4±8.3 years; range, 49–70 years) were evaluated. The maximum size of breast lesions in 6 cases ranged from 1.2 to 4.5 cm, while 1 case showed a diffused pattern. Ultrasound features of breast metastases from lung cancer were irregular (5/7, 71.4%), indistinct (6/7, 85.7%), hypoechoic (7/7, 100.0%), and parallel (6/7, 85.7%) masses without calcification. Immunohistochemical staining test was positive for thyroid transcription factor 1 (TTF-1) in all patients (7/7, 100.0%), 3 cases (3/5, 60.0%) were negative for p63, 5 cases (5/5, 100.0%) were positive for cytokeratin 7 (CK7), 4 cases (4/5, 80.0%) were positive for napsin A. Conclusions The ultrasonographic features of lung metastases to the breast are clinically important to understand. A known history of the primary lung cancer is of great importance when evaluating patients with a breast nodule. The presence of an ipsilateral lung cancer, breast nodule and axillary lymphadenopathy should be considered with pathological and immunohistochemical data to differentiate breast metastases from a primary breast malignancy in this setting.
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Affiliation(s)
- Bo Wang
- Department of Ultrasound, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Ying Jiang
- School of Medicine, Nankai University, Tianjin, China
| | - Shi Yu Li
- Department of Ultrasound, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Rui Lan Niu
- Department of Ultrasound, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Justin D Blasberg
- Section of Thoracic Surgery, Department of Surgery, Yale School of Medicine, New Haven, CT, USA
| | - Jussuf T Kaifi
- Division for Cardiothoracic Surgery, Ellis Fischel Cancer Center, University of Missouri, Columbia, MO, USA
| | - Gang Liu
- Department of Radiology, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Zhi Li Wang
- Department of Ultrasound, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
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Kriegsmann K, Zgorzelski C, Muley T, Christopoulos P, von Winterfeld M, Herpel E, Goeppert B, Mechtersheimer G, Sinn P, Stenzinger A, Schirmacher P, Winter H, Eichinger M, Warth A, Kriegsmann M. Immunohistological expression of oestrogen receptor, progesterone receptor, mammaglobin, human epidermal growth factor receptor 2 and GATA-binding protein 3 in non-small-cell lung cancer. Histopathology 2020; 77:900-914. [PMID: 32634256 DOI: 10.1111/his.14203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/27/2020] [Accepted: 07/02/2020] [Indexed: 12/11/2022]
Abstract
AIMS Non-small-cell lung cancer (NSCLC) and breast cancer are common entities. Staining for oestrogen receptor (ER), progesterone receptor (PgR), mammaglobin (MAMG) and GATA-binding protein 3 (GATA3) is frequently performed to confirm a mammary origin in the appropriate diagnostic setting. However, comprehensive data on the immunohistological expression of these markers in NSCLC are limited. Therefore, the aim of this study was to analyse a large cohort of NSCLCs and correlate the staining results with clinicopathological variables. METHODS AND RESULTS A tissue microarray was stained for ER, PgR, MAMG, human epidermal growth factor receptor 2 (HER2), and GATA3, and included 636 adenocarcinomas (ADCs), 536 squamous cell carcinomas (SqCCs), 65 large-cell-carcinomas, 34 pleomorphic carcinomas, and 20 large-cell neuroendocrine carcinomas. HER2 status was determined for immunohistochemically positive cases with chromogenic in-situ hybridisation. Markers with a proportion of ≥5% positive cases in ADC and SqCC were considered for survival analysis. Among ADCs, 62 (10%), 17 (3%), one (<1%), seven (1%), and 49 (8%) cases were positive for ER, PgR, MAMG, HER2, and GATA3, respectively. Among SqCCs, 10 (2%), 14 (3%), two (<1%) and 109 (20%) cases were positive for ER, PgR, HER2, and GATA3, but none of the samples showed positivity for MAMG. ER positivity was associated with ADC, female sex, smaller tumour size, and lower clinical stage. None of the markers had an impact on survival. CONCLUSION We report on ER, PgR, MAMG, HER2 and GATA3 expression in a large cohort of NSCLCs. Interpretation of these markers in the differential diagnostic setting should be based on a multimarker panel.
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Affiliation(s)
- Katharina Kriegsmann
- Department of Internal Medicine V, Haematology, Oncology and Rheumatology, University Hospital Heidelberg, Heidelberg, Germany
| | | | - Thomas Muley
- Translational Lung Research Centre Heidelberg, Member of the German Centre for Lung Research (DZL), Thoraxklinik at Heidelberg University, Heidelberg, Germany.,Translational Research Unit, Thoraxklinik at Heidelberg University, Heidelberg, Germany
| | - Petros Christopoulos
- Department of Thoracic Oncology, Thoraxklinik at Heidelberg University, Heidelberg, Germany
| | | | - Esther Herpel
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Benjamin Goeppert
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | | | - Peter Sinn
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Albrecht Stenzinger
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Translational Lung Research Centre Heidelberg, Member of the German Centre for Lung Research (DZL), Thoraxklinik at Heidelberg University, Heidelberg, Germany
| | - Peter Schirmacher
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany
| | - Hauke Winter
- Translational Lung Research Centre Heidelberg, Member of the German Centre for Lung Research (DZL), Thoraxklinik at Heidelberg University, Heidelberg, Germany.,Translational Research Unit, Thoraxklinik at Heidelberg University, Heidelberg, Germany.,Department of Thoracic Surgery, Thoraxklinik at Heidelberg University, Heidelberg, Germany
| | - Monika Eichinger
- Department of Radiology, Thoraxklinik at Heidelberg University, Heidelberg, Germany
| | - Arne Warth
- Institute of Pathology, Cytopathology, and Molecular Pathology, UEGP MVZ Gießen/Wetzlar/Limburg, Limburg, Germany
| | - Mark Kriegsmann
- Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Translational Lung Research Centre Heidelberg, Member of the German Centre for Lung Research (DZL), Thoraxklinik at Heidelberg University, Heidelberg, Germany.,Translational Research Unit, Thoraxklinik at Heidelberg University, Heidelberg, Germany
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Zhang Y, Yan WT, Yang ZY, Li YL, Tan XN, Jiang J, Zhang Y, Qi XW. The role of WT1 in breast cancer: clinical implications, biological effects and molecular mechanism. Int J Biol Sci 2020; 16:1474-1480. [PMID: 32210734 PMCID: PMC7085227 DOI: 10.7150/ijbs.39958] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 01/22/2020] [Indexed: 02/06/2023] Open
Abstract
Although Wilms' tumor gene 1 (WT1) was first cloned and identified as a tumor suppressor gene in nephroblastoma, subsequent studies have demonstrated that it can also play an oncogenic role in leukemia and various solid tumors. WT1 exerts biological functions with high tissue- and cell-specificity. This article reviews the relationship between WT1 and breast cancer from two aspects: (1) clinical application of WT1, including the relationship between expression of WT1 and prognosis of breast cancer patients, and its effectiveness as a target for comprehensive therapy of breast cancer; (2) the biological effects and molecular mechanisms of WT1 in the development and progression of breast cancer, including proliferation, apoptosis, invasion, and metastasis of breast cancer cells.
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Affiliation(s)
- Ye Zhang
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Wen-Ting Yan
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Ze-Yu Yang
- Breast and Thyroid Surgery, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 400013, China
| | - Yan-Ling Li
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Xuan-Ni Tan
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Jun Jiang
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Yi Zhang
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Xiao-Wei Qi
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
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DNA methylation landscape of triple-negative ductal carcinoma in situ (DCIS) progressing to the invasive stage in canine breast cancer. Sci Rep 2020; 10:2415. [PMID: 32051475 PMCID: PMC7015930 DOI: 10.1038/s41598-020-59260-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 01/16/2020] [Indexed: 11/09/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is a subtype of breast cancer unresponsive to traditional receptor-targeted treatments, leading to a disproportionate number of deaths. Invasive breast cancer is believed to evolve from non-invasive ductal carcinoma in situ (DCIS). Detection of triple-negative DCIS (TN-DCIS) is challenging, therefore strategies to study molecular events governing progression of pre-invasive TN-DCIS to invasive TNBC are needed. Here, we study a canine TN-DCIS progression and investigate the DNA methylation landscape of normal breast tissue, atypical ductal hyperplasia (ADH), DCIS and invasive breast cancer. We report hypo- and hypermethylation of genes within functional categories related to cancer such as transcriptional regulation, apoptosis, signal transduction, and cell migration. DNA methylation changes associated with cancer-related genes become more pronounced at invasive breast cancer stage. Importantly, we identify invasive-only and DCIS-specific DNA methylation alterations that could potentially determine which lesions progress to invasive cancer and which could remain as pre-invasive DCIS. Changes in DNA methylation during TN-DCIS progression in this canine model correspond with gene expression patterns in human breast tissues. This study provides evidence for utilizing methylation status of gene candidates to define late-stage (DCIS and invasive), invasive stage only or DCIS stage only of TN-DCIS progression.
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Chapel DB, Schulte JJ, Husain AN, Krausz T. Application of immunohistochemistry in diagnosis and management of malignant mesothelioma. Transl Lung Cancer Res 2020; 9:S3-S27. [PMID: 32206567 PMCID: PMC7082260 DOI: 10.21037/tlcr.2019.11.29] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Immunohistochemistry plays an indispensable role in accurate diagnosis of malignant mesothelioma, particularly in morphologically challenging cases and in biopsy and cytology specimens, where tumor architecture is difficult or impossible to evaluate. Application of a targeted panel of mesothelial- and epithelial-specific markers permits correct identification of tumor lineage in the vast majority of cases. An immunopanel including two mesothelial markers (calretinin, CK5/6, WT-1, or D2-40) and two epithelial markers (MOC-31 and claudin-4) offers good sensitivity and specificity, with adjustments as appropriate for the differential diagnosis. Once mesothelial lineage is established, malignancy-specific studies can help verify a diagnosis of malignant mesothelioma. BAP1 loss, CDKN2A homozygous deletion, and MTAP loss are highly specific markers of malignancy in a mesothelial lesion, and they attain acceptable diagnostic sensitivity when applied as a diagnostic panel. Novel markers of malignancy, such as 5-hmC loss and increased EZH2 expression, are promising, but have not yet achieved widespread clinical adoption. Some diagnostic markers also have prognostic significance, and PD-L1 immunohistochemistry may predict tumor response to immunotherapy. Application and interpretation of these immnuomarkers should always be guided by clinical history, radiographic findings, and above all histomorphology.
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Affiliation(s)
- David B Chapel
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA.,Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Jefree J Schulte
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
| | - Aliya N Husain
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
| | - Thomas Krausz
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
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Enrico D, Saucedo S, Bravo I. Breast metastasis from primary lung adenocarcinoma in a young woman: A case report and literature review. World J Clin Oncol 2019; 10:269-278. [PMID: 31396476 PMCID: PMC6682499 DOI: 10.5306/wjco.v10.i7.269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 05/25/2019] [Accepted: 07/16/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Breast metastasis from extra mammary malignancies is rare. An incidence of 0.2%-1.3% has been reported in the literature, including that from different types of malignant neoplasms.
CASE SUMMARY We present a case of a 29-year-old nonsmoking woman with breast metastasis from lung adenocarcinoma. Computed tomography revealed atelectasis in the right middle lobe of the lung and ipsilateral pleural effusion. Additionally, on physical examination, a small mass was noted in her right breast. The patient underwent bronchoscopy, needle thoracentesis, and breast biopsy. Following cytology, histology and immunohistochemistry, primary lung adenocarcinoma with metastasis to the breast was diagnosed. Only 63 cases, including our patient, have been reported in the literature since 2000, and this is the second in a woman under 30 years of age.
CONCLUSION This atypical presentation may cause a significant diagnostic dilemma, but the contribution of immunohistochemistry is crucial to the accuracy of the final diagnosis.
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Affiliation(s)
- Diego Enrico
- Department of Clinical Oncology, Eva Perón General Hospital, 3200 Balbín Avenue, San Martín 1650, Buenos Aires, Argentina
| | - Silvia Saucedo
- Department of Pathology, Eva Perón General Hospital, 3200 Balbín Avenue, San Martín 1650, Buenos Aires, Argentina
| | - Inés Bravo
- Department of Pathology, Eva Perón General Hospital, 3200 Balbín Avenue, San Martín 1650, Buenos Aires, Argentina
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p63 isoforms in triple-negative breast cancer: ΔNp63 associates with the basal phenotype whereas TAp63 associates with androgen receptor, lack of BRCA mutation, PTEN and improved survival. Virchows Arch 2018; 472:351-359. [PMID: 29484502 DOI: 10.1007/s00428-018-2324-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 02/02/2018] [Accepted: 02/15/2018] [Indexed: 12/16/2022]
Abstract
The TP63 gene encodes two major protein variants that differ in their N-terminal sequences and have opposing effects. In breast, ΔNp63 is expressed by immature stem/progenitor cells and mature myoepithelial/basal cells and is a characteristic feature of basal-like triple-negative breast cancers (TNBCs). The expression and potential role of TAp63 in the mammary gland and breast cancers is less clear, partly due to the lack of studies that employ p63 isoform-specific antibodies. We used immunohistochemistry with ΔNp63-specific or TAp63-specific monoclonal antibodies to investigate p63 isoforms in 236 TNBCs. TAp63, but not ΔNp63, was seen in tumour-associated lymphocytes and other stromal cells. Tumour cells showed nuclear staining for ΔNp63 in 17% of TNBCs compared to 7.3% that were positive for TAp63. Whilst most TAp63+ tumours also contained ΔNp63+ cells, the levels of the two isoforms were independent of each other. ΔNp63 associated with metaplastic and medullary cancers, and with a basal phenotype, whereas TAp63 associated with androgen receptor, BRCA1/2 wild-type status and PTEN positivity. Despite the proposed effects of p63 on proliferation, Ki67 did not correlate with either p63 isoform, nor did they associate with p53 mutation status. ΔNp63 showed no association with patient outcomes, whereas TAp63+ patients showed fewer recurrences and improved overall survival. These findings indicate that both major p63 protein isoforms are expressed in TNBCs with different tumour characteristics, indicating distinct functional activities of p63 variants in breast cancer. Analysis of individual p63 isoforms provides additional information into TNBC biology, with TAp63 expression indicating improved prognosis.
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Abstract
Merkel cell carcinoma and melanoma can each occur primarily in breast skin, or metastasize to the breast. The breast is a rare site of metastasis of essentially any and every type of tumor, including carcinomas, sarcomas, and hematolymphoid neoplasms, and 10-30% of breast metastases may represent the initial presentation of disease. Although metastases generally recapitulate histologic features of the primary tumor, they are diagnostically challenging given their rarity and morphologic overlap with breast carcinoma, including special types of breast cancer. Histologic clues may include lack of carcinoma in situ, lack of central elastosis, pattern of infiltration around normal breast structures, yet none of these are specific. Careful correlation with clinical history and judicious use of immunostain panels is essential in approaching these cases.
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Affiliation(s)
- Megan L Troxell
- Stanford University School of Medicine, Dept of Pathology, L235 300 Pasteur Drive, Stanford, CA 94305, United States.
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