Table II.

Cytological features of Warthin-like mucoepidermoid carcinoma.

Authors (year)	MAML2 fusion	Initial cytological diagnosis	Cellularity	Background	Lymphocytes	Squamous cellsa	Intermediate cellsb	Mucous cells	Oncocytes	Nuclear atypia	(Refs.)
Balasubiramaniyan et al (2019)	Not assessed	High-grade MEC	Cellular	Cystic component, necrosis, macrophages	+	+	+	+	-	Mild	(9)
Hang et al (2017)	Positive	Low-grade MEC, suspected but cannot exclude a non-neoplastic cyst with reactive/metaplastic changes	Moderate	Cystic component; mucin, histiocytes, multinucleated giant cells	+	+	+	-	-	Mild	(10)
Hang et al (2017)	Positive	1st: Pleomorphic adenoma; 2nd: MEC, suspected	Small amountc	Cystic component; myxoid, proteinaceous	+	+	+	-	-	Mild	(10)
Akaev et al (2018)	Positive	Insufficient material	Small amount	Intense inflammatory infiltrate with few duct cells	+	-	-	-	-	-	(11)
Zhang et al (2019)	Positive	Warthin tumour or a tumour with sebaceous cell component, among others	Small amountd	Cystic contents; macrophages, lymphoid cells	+	-	-	+	-	Mild	(8)
Present case	Positive	Lymphoepithelial sialadenitis	Moderate	Cystic contents; lymphocytes macrophages	+	-	+	+	-	Mild	/

^aSquamous cells include the term ‘squamoid cells’;

^bintermediate cells include the term ‘polygonal and tangles cells’;

^csince the first diagnosis that revealed a small number of benign epithelial cells;

^dsince the diagnosis that indicated mostly a cystic component and rare epithelial cells. MAML2, mastermind-like transcriptional coactivator 2; NA, not available.