No.	Age/sex	Site	Smoking history	Histology	Cell size of NEC	IHC of NEC	IHC of SCC	Follow-up	Reference
1	63/M	Retromolar	NA	NEC	Small	NA	-	DOD at 24 mths	Benning, et al. 1990 [11]
2	76/M	Tongue	Yes	NEC	Small	+Keratin, EMA, CEA, NSE	-	DUC at 2 mths	Yoshida, et al. 1995 [12]
3	46/F	Mandible	NA	TC	-	+CGA, NSE	-	NED at 24 mths	Coleman, et al. 1996 [13]
4	49/M	Floor of mouth	Yes	NEC	Medium to large	+CGA, SYP, CT, LMW-CK	-	DOD at 10 days	Baker, et al. 1999 [14]
5	59/M	Gingiva	NA	NEC and SCC	Large	+CGA, CD56	+CAM5.2	NA	Oku, et al, 2002 [8]
6	68/M	Gingiva	NA	AC	-	+CGA,SYP, NSE, CAM5.2, AE1/AE3	-	NA	Abiko, et al. 2004 [15]
7	79/M	Tongue	NA	NEC	Large	+CD56, NSE, p16, p53, p63, 34βE12, CK5/6, CK19	-	NED at 18 mths	Kusafuka, et al. 2009 [16]
8	62/F	Gingiva	NA	NEC and SCC	Small	+CGA, SYP, CD56, NSE, K7, K19	+K5, K14, K15, K17, p63	NED at 23 mths	Mochizuki, et al. 2010 [7]
9	34/F	Retromolar	NA	NEC	Large	+CGA, CD56, CD57, S100P, Keratin, EMA	-	AWD at 9 mths	Krishnamurthy, et al. 2011 [17]
10	46/F	Retromolar	NA	TC	-	+CGA, SYP, NSE, AE1/AE3, CK7, p63, S100, Vimentin, CD57	-	NED at 11 mths	Yang, et al., 2011 [18]
11	57/M	Uvula	NA	AC	-	+SYP, EMA, AE1/AE2	-	DOD at 9 mths	Goldman, et al., 2012 [19]
12	25/F	Gingiva	NA	NEC	Medium to large	+SYP, NSE, S100	-	NED at 13 mths	Wu, et al. 2014 [3]
13	38/F	Buccal mucosa	NA	NEC	Small	+SYP, EMA, AE1/AE3	-	NED at 8 mths	Wu, et al. 2014 [3]
14	73/M	Gingiva	Yes	NEC	Small	+CGA, SYP, NSE, AE1/AE3	-	NED at 14 mths	Zeng, et al. 2015 [4]
15	65/M	Floor of mouth	NA	AC and SCC	-	+SYP, CD56	+34βE12, p63	AWRR at 6 mths	Yamagata, et al. 2016 [6]
16	59/M	Soft palate	Yes	NEC and SCC	Small	+CGA, SYP, CD56, p16	+34βE12, p63, p16	NED at 30 mths	Our case