. 2011 Dec 20;6(2):191–207. doi: 10.1007/s12105-011-0320-9

Table 1.

Classification of sinonasal tract adenocarcinoma [1–4]

Salivary gland-type adenocarcinoma	Includes mucoepidermoid carcinoma, adenoid cystic carcinoma, acinic cell carcinoma, epithelial-myoepithelial carcinoma, clear cell carcinoma, polymorphous low-grade adenocarcinoma, among others
Intestinal type adenocarcinoma	Papillary type	Papillary tubular cylinder cell type I
	Colonic type	Papillary tubular cylinder cell type II
	Solid type	Papillary tubular cylinder cell type III
	Mucinous type	Alveolar goblet type
	Mucinous type	Signet ring type
	Mixed	Transitional
Non-intestinal type adenocarcinoma	Low-grade
Non-intestinal type adenocarcinoma	High-grade