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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">Pathol. Oncol. Res.</journal-id>
<journal-title>Pathology &#x26; Oncology Research</journal-title>
<abbrev-journal-title abbrev-type="pubmed">Pathol. Oncol. Res.</abbrev-journal-title>
<issn pub-type="epub">1532-2807</issn>
<publisher>
<publisher-name>Frontiers Media S.A.</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="publisher-id">1611563</article-id>
<article-id pub-id-type="doi">10.3389/pore.2023.1611563</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Pathology and Oncology Archive</subject>
<subj-group>
<subject>Correction</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group>
<article-title>Expression of Concern: Case report: A rare case of tumor-to-tumor metastasis: metastatic lobular breast carcinoma to clear cell renal cell carcinoma</article-title>
<alt-title alt-title-type="left-running-head">Pathology &#x26; Oncology Research Editorial Office</alt-title>
<alt-title alt-title-type="right-running-head">
<ext-link ext-link-type="uri" xlink:href="https://doi.org/10.3389/pore.2023.1611563">10.3389/pore.2023.1611563</ext-link>
</alt-title>
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<contrib-group>
<contrib contrib-type="author" corresp="yes">
<collab>Pathology &#x26; Oncology Research Editorial Office</collab>
<xref ref-type="corresp" rid="c001">&#x2a;</xref>
<uri xlink:href="https://loop.frontiersin.org/people/983694/overview"/>
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<author-notes>
<fn fn-type="edited-by">
<p>
<bold>Approved by:</bold> <ext-link ext-link-type="uri" xlink:href="https://loop.frontiersin.org/people/983694/overview">Pathology &#x26; Oncology Research Editorial Office</ext-link>, Frontiers Media SA, Switzerland</p>
</fn>
<corresp id="c001">&#x2a;Correspondence: Pathology &#x26; Oncology Research Editorial Office, <email>editorialoffice@por-journal.com</email>
</corresp>
</author-notes>
<pub-date pub-type="epub">
<day>09</day>
<month>11</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="collection">
<year>2023</year>
</pub-date>
<volume>29</volume>
<elocation-id>1611563</elocation-id>
<history>
<date date-type="received">
<day>24</day>
<month>10</month>
<year>2023</year>
</date>
<date date-type="accepted">
<day>03</day>
<month>11</month>
<year>2023</year>
</date>
</history>
<permissions>
<copyright-statement>Copyright &#xa9; 2023 Pathology &#x26; Oncology Research Editorial Office.</copyright-statement>
<copyright-year>2023</copyright-year>
<copyright-holder>Pathology &#x26; Oncology Research Editorial Office</copyright-holder>
<license xlink:href="http://creativecommons.org/licenses/by/4.0/">
<p>This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.</p>
</license>
</permissions>
<related-article id="RA1" related-article-type="corrected-article" journal-id="Pathol. Oncol. Res." journal-id-type="nlm-ta" xlink:href="10.3389/pore.2023.1611204" ext-link-type="doi">An Expression of Concern on <article-title>Case report: A rare case of tumor-to-tumor metastasis: metastatic lobular breast carcinoma to clear cell renal cell carcinoma</article-title> by Zhang L, Yuan P, Cao Q, Mu J, Ying J and Guo C (2023). Pathol. Oncol. Res. 29:1611204. doi: <object-id>10.3389/pore.2023.1611204</object-id>
</related-article>
</article-meta>
</front>
<body>
<p>Following publication, the authors contacted the Editorial Office stating that the findings reported in the article are no longer supported by the analyses. With this notice, Pathology and Oncology Research states its awareness of concerns regarding &#x201c;<bold>A rare case of tumor-to-tumor metastasis: metastatic lobular breast carcinoma to clear cell renal cell carcinoma</bold>&#x201d; published on 12 June 2023. This expression of concern has been posted while Pathology and Oncology Research awaits further clarification from the authors. It will be updated accordingly after that time.</p>
</body>
</article>