PMID- 35879827 OWN - NLM STAT- MEDLINE DCOM- 20220727 LR - 20220803 IS - 1473-2300 (Electronic) IS - 0300-0605 (Print) IS - 0300-0605 (Linking) VI - 50 IP - 7 DP - 2022 Jul TI - Warthin-like mucoepidermoid carcinoma of the parotid gland: a clinicopathological analysis of two cases. PG - 3000605221101329 LID - 10.1177/03000605221101329 [doi] LID - 03000605221101329 AB - Mucoepidermoid carcinoma (MEC) is the most common malignant tumour of the salivary gland, primarily involving the parotid gland. Here, the cases of two patients, aged 47 and 67 years, respectively, who underwent surgery for pathologically confirmed Warthin-like MEC of the parotid gland between January 2019 and December 2019 in Anyang Tumour Hospital, are described. In each case, the tumour consisted of epithelial and lymphoid cell components, covered with two or more layers of epithelium, with visible scattered mucous cells, and lymphoid stroma with a large number of lymphocytes and germinal centres formed. Most importantly, the tumours lacked the well-organized, bilayered oncocytic epithelial structure that is characteristic of Warthin's tumour. Mastermind like transcriptional coactivator 2 (MAML2) gene rearrangements were identified in the tumour cells using break-apart fluorescence in situ hybridization (FISH) probes, confirming the diagnosis of Warthin-like MEC. Post-operatively, patients have remained disease free for 31 and 27 months, respectively. Warthin-like MEC of the parotid gland is rare and is often misdiagnosed as metaplastic Warthin's tumour. Diagnosis depends mainly on the unique clinicopathologic features together with FISH analyses. FAU - Lei, Ruixue AU - Lei R AUID- ORCID: 0000-0002-1802-6589 AD - Department of Pathology, Anyang Tumour Hospital, The Affiliated Anyang Tumour Hospital of Henan University of Science and Technology, Anyang, Henan, China. FAU - Yang, Haijun AU - Yang H AD - Department of Pathology, Anyang Tumour Hospital, The Affiliated Anyang Tumour Hospital of Henan University of Science and Technology, Anyang, Henan, China. LA - eng PT - Case Reports PT - Journal Article PL - England TA - J Int Med Res JT - The Journal of international medical research JID - 0346411 RN - 0 (Transcription Factors) SB - IM MH - *Adenolymphoma/diagnosis/genetics/surgery MH - *Carcinoma, Mucoepidermoid/diagnosis/genetics/surgery MH - Humans MH - In Situ Hybridization, Fluorescence MH - Parotid Gland/pathology/surgery MH - Transcription Factors/genetics PMC - PMC9340346 OTO - NOTNLM OT - MAML2 OT - Warthin's tumour OT - break-apart probes OT - fluorescence in situ hybridization OT - mucoepidermoid carcinoma OT - parotid neoplasm COIS- Declaration of conflicting interest: The author declares that there is no conflict of interest. EDAT- 2022/07/27 06:00 MHDA- 2022/07/28 06:00 PMCR- 2022/07/25 CRDT- 2022/07/26 00:13 PHST- 2022/07/26 00:13 [entrez] PHST- 2022/07/27 06:00 [pubmed] PHST- 2022/07/28 06:00 [medline] PHST- 2022/07/25 00:00 [pmc-release] AID - 10.1177_03000605221101329 [pii] AID - 10.1177/03000605221101329 [doi] PST - ppublish SO - J Int Med Res. 2022 Jul;50(7):3000605221101329. doi: 10.1177/03000605221101329.