{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T19:06:31Z","timestamp":1778180791596,"version":"3.51.4"},"reference-count":13,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2023,1,6]],"date-time":"2023-01-06T00:00:00Z","timestamp":1672963200000},"content-version":"vor","delay-in-days":5,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clinical Case Reports"],"published-print":{"date-parts":[[2023,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Metastases of distant primary tumors on the parotid gland are very rare. Tumor\u2010to\u2010tumor metastasis to salivary gland tumors is extremely rare. A case of a 69\u2010year\u2010old woman with a large left parotid gland mass with no previous salivary gland problems or cancer. Fine\u2010needle aspiration (FNA) showed evidence of a Warthin tumor. A total left parotidectomy was performed. The final pathology report showed a Warthin tumor containing two metastases of adenocarcinoma. The immunohistochemistry of the metastases led to the diagnosis of primary breast cancer. A negative FNA does not rule out the possibility of a malignant parotid tumor or metastasis, and a parotid lump should be presumed to be a secondary tumor until proven otherwise if the patient has a history of any distant primary cancer. Our patient case serves as a reminder that a new distant primary cancer might be the cause of a parotid lump.<\/jats:p>","DOI":"10.1002\/ccr3.6817","type":"journal-article","created":{"date-parts":[[2023,1,6]],"date-time":"2023-01-06T09:05:09Z","timestamp":1672995909000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Tumor\u2010to\u2010tumor metastasis to Warthin tumor presenting as an initial sign of breast carcinoma: A case report"],"prefix":"10.1002","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1125-9072","authenticated-orcid":false,"given":"Iisa","family":"Mansikka","sequence":"first","affiliation":[{"name":"Department of Otorhinolaryngology and Head and Neck Surgery Turku University Hospital and University of Turku  Turku Finland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ilpo","family":"Kinnunen","sequence":"additional","affiliation":[{"name":"Department of 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