{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,28]],"date-time":"2026-10-28T23:34:17Z","timestamp":1793230457195,"version":"4.5.0"},"reference-count":11,"publisher":"SAGE Publications","issue":"8","license":[{"start":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T00:00:00Z","timestamp":1780444800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Int J Surg Pathol"],"published-print":{"date-parts":[[2026,12]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Myopericytoma is a rare perivascular neoplasm typically found in the extremities, with only a single previous case report in breast.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case Presentation<\/jats:title>\n                    <jats:p>We describe a 37-year-old woman presenting with a recurrent left breast mass, initially suspected to be a phyllodes tumour based on clinical and radiological features. Histologic examination revealed a spindle cell neoplasm with concentric perivascular growth, focal necrosis, brisk mitotic activity, and tumour infiltration into the adjacent breast. Immunohistochemistry confirmed positivity for smooth muscle actin and vimentin with a Ki-67 index of 15%\u201320%, consistent with myopericytoma. The short-interval recurrence, invasive features, and high mitotic activity raised concern for malignant myopericytoma.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This being only the second reported breast myopericytoma case report, highlights the diagnostic difficulty and emphasizes the importance of thorough pathologic and immunophenotypic assessment to distinguish it from more common spindle cell tumours of the breast and to guide appropriate surgical management.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10668969261449833","type":"journal-article","created":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T08:11:41Z","timestamp":1780474301000},"page":"2103-2108","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Recurrent Myopericytoma of the Breast Mimicking Phyllodes Tumour: A Diagnostic and Management Challenge"],"prefix":"10.1177","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1517-7357","authenticated-orcid":false,"given":"Purnima","family":"Paliwal","sequence":"first","affiliation":[{"name":"Department of Pathology, ABVIMS &amp; Dr. RML Hospital, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-7145-9437","authenticated-orcid":false,"given":"Sai","family":"Jyoti","sequence":"additional","affiliation":[{"name":"Department of Pathology, ABVIMS &amp; Dr. RML Hospital, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9902-7649","authenticated-orcid":false,"given":"Neha A.","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Pathology, ABVIMS &amp; Dr. RML Hospital, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arvind","family":"Ahuja","sequence":"additional","affiliation":[{"name":"Department of Pathology, ABVIMS &amp; Dr. RML Hospital, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,6,3]]},"reference":[{"issue":"2","key":"e_1_3_2_2_2","article-title":"Case study: world\u2019s largest renal myopericytoma\u2014management and literature review","volume":"1","author":"Nagaraju S","year":"2024","unstructured":"Nagaraju S, Goel HK, Paliwal P, Narasimharaj CM. Case study: world\u2019s largest renal myopericytoma\u2014management and literature review. Acad Oncol. 2024;1(2). https:\/\/doi.org\/10.20935\/AcadOnco7420","journal-title":"Acad Oncol"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.radcr.2020.10.051"},{"key":"e_1_3_2_4_2","first-page":"1453","volume-title":"Rosen\u2019s Breast Pathology","author":"Rosen PP.","year":"2014","unstructured":"Rosen PP. Tumors with perivascular myoid differentiation. In: Hoda SA, Brogi E, Koerner FC, Rosen PP, eds. Rosen\u2019s Breast Pathology. 4th ed. Lippincott Williams & Wilkins; 2014:1453\u20131456."},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1097\/PAS.0000000000000811"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00428-021-03162-x"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2559.2002.01537.x"},{"key":"e_1_3_2_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.modpat.2022.100070"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00066-025-02413-z"},{"issue":"3","key":"e_1_3_2_10_2","first-page":"293","article-title":"Malignant myopericytoma: report of a case and review of the literature","volume":"41","author":"Lau PP","year":"2009","unstructured":"Lau PP, Lui PC, Wang SC, Chan JK. Malignant myopericytoma: report of a case and review of the literature. Pathology. 2009;41(3):293\u2013295.","journal-title":"Pathology"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.1097\/01.pas.0000178091.54147.b1"},{"key":"e_1_3_2_12_2","doi-asserted-by":"publisher","DOI":"10.1097\/00000478-199805000-00001"}],"container-title":["International Journal of Surgical Pathology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/10668969261449833","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/10668969261449833","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/10668969261449833","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,28]],"date-time":"2026-10-28T23:20:43Z","timestamp":1793229643000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/10668969261449833"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,3]]},"references-count":11,"journal-issue":{"issue":"8","published-print":{"date-parts":[[2026,12]]}},"alternative-id":["10.1177\/10668969261449833"],"URL":"https:\/\/doi.org\/10.1177\/10668969261449833","relation":{"has-review":[{"id-type":"doi","id":"10.1177\/10668969261449833\/v1\/decision1","asserted-by":"object"},{"id-type":"doi","id":"10.1177\/10668969261449833\/v2\/response1","asserted-by":"object"},{"id-type":"doi","id":"10.1177\/10668969261449833\/v2\/decision1","asserted-by":"object"},{"id-type":"doi","id":"10.1177\/10668969261449833\/v1\/review1","asserted-by":"object"},{"id-type":"doi","id":"10.1177\/10668969261449833\/v1\/review2","asserted-by":"object"}]},"ISSN":["1066-8969","1940-2465"],"issn-type":[{"value":"1066-8969","type":"print"},{"value":"1940-2465","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,6,3]]}}}