Rare esophageal carcinoma-primary adenoid cystic carcinoma of the esophagus: A case report

Table 1 Clinical data on the 18 cases of adenoid cystic carcinoma of the esophagus reported in China

Clinical features	Subcategory	Number
Age		42-72 (60.8)
Sex	Male	14
	Female	4
Location	Cervical	1
	Upper thoracic	0
	Mid-thoracic	9
	Lower thoracic	7
	Esophagogastric junction	1
Endoscopic presentation	Protruding	13
	Ulcerative	5
Treatment	Surgery (including ESD)	17
	Chemoradiotherapy	1 (metastasis)
Depth of invasion (surgical cases)	Mucous layer	10
	Muscularis propria	2
	Adventitia	5
Metastasis to lymph nodes (Surgical cases)	LN positive	0
	LN negative	17

ESD: Endoscopic submucosal dissection; LN: Lymph node.