Table 1.

Demographic and clinicopathologic data of 20 primary esophageal melanomas evaluated in this study

Case	Sex	Age	Symptoms			Tumor location	Tumor size (cm)	Local metastases at the surgery	Follow-up (in months)
			Dysphagia	Pain	Weight loss
1	M	40	Unknown	Unknown	Unknown	Distal	7 × 3 × 3	No	Alive (96)
2	M	45	Yes	No	No	Distal	5.5	Yes	DOD (19)
3	M	47	Yes	No	No	Mid	Unknown	Unknown	DUNK (18)
4	M	51	Yes	Yes	No	Distal	6 × 3 × 5	Yes	DOD (10)
5*	M	57	Yes	Yes	Yes	Mid	7	No	DOPC
6	M	58	Unknown	Unknown	Unknown	Unknown	3 × 2.5	Yes	DOD (20)
7	M	59	Yes	No	No	Mid to distal	12.5 × 4	Yes	DOD (11)
8*	M	61	Yes	No	No	Mid to distal	0.7	No	DOD (16)
9	M	62	No	yes	No	Distal at E_G junction	5 × 4	Unknown	Unknown
10	M	65	No	Yes	No	Unknown	6 × 6 × 3	No	DOD (4)
11	M	68	Yes	Yes	Yes	Distal	6 × 3.5	Yes	DOD (22)
12	M	72	Unknown	Unknown	Unknown	Distal at E_G junction	2.5 × 2.3 × 1 + two more lesions	No	DUNK (7)
13	M	73	Yes	No	No	Distal at E_G junction	8	Yes	Unknown
14	M	79	Yes	Yes	Yes	Distal	7.5 × 4.5	Yes	DOPC
15	F	53	Yes	No	No	Distal	8 × 1.5	Yes	DOD (16)
16	F	55	Yes	No	No	Distal	4 × 1	Yes	Unknown
17	F	58	Yes	No	No	Distal at E_G junction	12 × 12 × 7.5	Yes	DOD (4)
18	F	69	Unknown	Unknown	Unknown	Distal	Two lesions: 3.5 × 2.5 × 1.5; 3 × 2 × 1	No	DUNK (104)
19	F	71	Unknown	Unknown	Unknown	Unknown	2.1 × 1.3 × 0.7	No	DUNK (8)
20	F	78	Yes	No	No	Distal at E_G junction	7 × 4.5 × 4.5	No	Unknown

DOD died of disease, DOPC died of postoperative complications, DUNK died of unknown causes, E_G esophagogastric, LTF lost to follow-up

^*some data previously reported [27, 28]