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Janeva S, Krabbe E, Parris TZ, Nasic S, Sundquist M, Karlsson P, Audisio RA, Olofsson Bagge R, Kovács A. Clinical evaluation of molecular surrogate subtypes in patients with ipsilateral multifocal primary breast cancer. Breast Cancer Res 2023; 25:36. [PMID: 37024949 PMCID: PMC10080895 DOI: 10.1186/s13058-023-01632-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 03/02/2023] [Indexed: 04/08/2023] Open
Abstract
BACKGROUND When ipsilateral multifocal primary breast cancer (IMBC) is detected, standard routine is to evaluate the largest tumor with immunohistochemistry (IHC). As all foci are not routinely characterized, many patients may not receive optimal adjuvant treatment. Here, we assess the clinical relevance of examining at least two foci present in patients with IMBC. METHODS Patients diagnosed and treated for IMBC at Sahlgrenska University Hospital (Gothenburg, Sweden) between 2012 and 2017 were screened. In total, 180 patients with ≥ 2 invasive foci (183 specimens) were assessed with IHC and included in this study. Expression of the estrogen (ER) and progesterone (PR) receptors, Ki67, HER2, and tumor grade were used to determine the molecular surrogate subtypes and discordance among the foci was recorded. An additional multidisciplinary team board was then held to re-assess whether treatment recommendations changed due to discordances in molecular surrogate subtype between the different foci. RESULTS Discordance in ER, PR, HER2, and Ki67 was found in 2.7%, 19.1%, 7.7%, and 16.9% of invasive foci, respectively. Discordance in the molecular surrogate subtypes was found in 48 of 180 (26.7%) patients, which resulted in therapy changes for 11 patients (6.1%). These patients received additional endocrine therapy (n = 2), chemotherapy (n = 3), and combined chemotherapy and trastuzumab (n = 6). CONCLUSION Taken together, when assessing at least two tumor foci with IHC, regardless of shared morphology or tumor grade between the different foci, 6.1% of patients with IMBC were recommended additional adjuvant treatment. A pathologic assessment using IHC of all foci is therefore recommended to assist in individualized treatment decision making.
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Affiliation(s)
- Slavica Janeva
- Department of Surgery, Sahlgrenska Breast Center, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden.
- Department of Clinical Pathology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
| | - Ellen Krabbe
- Department of Surgery, Kungälv Hospital, Region Västra Götaland, Kungälv, Sweden
| | - Toshima Z Parris
- Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Sahlgrenska Center for Cancer Research, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Salmir Nasic
- Research and Development Centre, Skaraborg Hospital, Skövde, Sweden
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Marie Sundquist
- Department of Surgery, Kalmar County Hospital, Kalmar, Sweden
| | - Per Karlsson
- Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Oncology, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
| | - Riccardo A Audisio
- Department of Surgery, Sahlgrenska Breast Center, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Roger Olofsson Bagge
- Department of Surgery, Sahlgrenska Breast Center, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
- Sahlgrenska Center for Cancer Research, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Anikó Kovács
- Department of Clinical Pathology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Clinical Pathology, Sahlgrenska University Hospital, Region Västra Götaland, Gothenburg, Sweden
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Wodarz D, Iwasa Y, Komarova NL. On the emergence of multifocal cancers. J Carcinog 2004; 3:13. [PMID: 15461783 PMCID: PMC526757 DOI: 10.1186/1477-3163-3-13] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2004] [Accepted: 10/01/2004] [Indexed: 11/21/2022] Open
Abstract
Several tumors can exist as multiple lesions within a tissue. The lesions may either arise independently, or they may be monoclonal. The importance of multiple lesions for tumor staging, progression, and treatment is subject to debate. Here we use mathematical models to analyze the emergence of multiple, clonally related lesions within a single tissue. We refer to them as multi-focal cancers. We find that multifocal cancers can arise through a dynamical interplay between tumor promoting and inhibiting factors. This requires that tumor promoters act locally, while tumor inhibitors act over a longer range. An example of such factors may be angiogenesis promoters and inhibitors. The model further suggests that multifocal cancers represent an intermediate stage in cancer progression as the tumor evolves away from inhibition and towards promotion. Different patterns of progression can be distinguished: (i) If tumor inhibition is strong, the initial growth occurs as a unifocal and self contained lesion; progression occurs through bifurcation of the lesion and this gives rise to multiple lesions. As the tumor continues to evolve and pushes the balance between inhibition and promotion further towards promotion, the multiple lesions eventually give rise to a single large mass which can invade the entire tissue. (ii) If tumor inhibition is weaker upon initiation, growth can occur as a single lesion without the occurrence of multiple lesions, until the entire tissue is invaded. The model suggests that the sum of the tumor sizes across all lesions is the best characteristic which correlates with the stage and metastatic potential of the tumor.
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Affiliation(s)
- Dominik Wodarz
- Department of Ecology and Evolution, 321 Steinhaus Hall, University of California, Irvine 92697, USA
| | - Yoh Iwasa
- Department of Biology, Faculty of Science, Kyushu University, Fukuoka 812-8581, Japan
| | - Natalia L Komarova
- Department of Ecology and Evolution, 321 Steinhaus Hall, University of California, Irvine 92697, USA
- Department of Mathematics, University of California, Irvine CA 92692, USA
- Department of Mathematics, Rutgers University, Piscataway NJ 08854, USA
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