Tumor-to-tumor metastasis to Warthin tumor presenting as an initial sign of breast carcinoma: A case report

: Mansikka Iisa, Kinnunen Ilpo, Hirvonen Jussi, Vainio Paula, Velhonoja Jarno

Publisher: WILEY

: 2023

: Clinical Case Reports

: CLINICAL CASE REPORTS

: CLIN CASE REP

: e06817

: 11

: 4

: 2050-0904

DOI: https://doi.org/10.1002/ccr3.6817

: https://onlinelibrary.wiley.com/doi/10.1002/ccr3.6817

: https://research.utu.fi/converis/portal/detail/Publication/178659304

Metastases of distant primary tumors on the parotid gland are very rare. Tumor-to-tumor metastasis to salivary gland tumors is extremely rare. A case of a 69-year-old woman with a large left parotid gland mass with no previous salivary gland problems or cancer. Fine-needle 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.

Clinical Case Reports - 2023 - Mansikka - Tumor‐to‐tumor metastasis to Warthin tumor presenting as an initial sign of.pdf