Table 2.

Baseline characteristics of the 11 patients with salivary gland adenoid cystic carcinoma who developed locoregional recurrences after adjuvant therapy

Case	Tumor location	pT	pN	Stage	M	ECS	PNI	BI	SI	MI	LI	VI	LR	RR	DM	Arm
1	Parotid gland	4	0	IVa	+	-	+	-	-	+	-	-	+ (in-field)	-	+	PORT
2	Parotid gland	2	0	II	+	-	+	-	-	-	-	-	+ (in-field)	+ (in-field)	+	PORT
3	Hard palate	4	1	IVa	+	+	+	+	-	+	-	-	+ (in-field)	-	+	POCRT
4	Hard palate	4	0	IVa	+	-	+	+	-	+	-	-	+ (in-field)	-	+	PORT
5	Nasal cavity	4	0	IVa	+	-	+	+	-	+	-	-	+ (in-field)	-	+	PORT
6	Gingivae	4	0	IVa	+	-	+	+	-	-	-	+	+ (in-field)	-	+	PORT
7	Submandibular gland	1	2b	IVa	+	-	+	-	-	+	-	-	+ (in-field)	+ (in- & out-field)	-	PORT
8	Submandibular gland	4	0	IVa	+	-	+	-	-	+	-	-	-	+ (in-field)	+	PORT
9	Submandibular gland	2	0	II	+	-	+	-	-	-	-	-	-	+ (out-field)	+	PORT
10	Submandibular gland	3	1	III	+	-	+	-	-	+	+	-	-	+ (out-field)	+	PORT
11	Submandibular gland	4	0	IVa	+	-	+	-	-	+	-	-	-	+ (out-field)	+	PORT

Abbreviations: pT pathological T stage, pN pathology N stage, M surgical margins, PNI perineural invasion, BI bone invasion, SI skin invasion, MI muscle invasion, LI lymphatic invasion, VI vascular invasion, LR local recurrence, RR regional node recurrence, DM distant metastases, PORT postoperative radiotherapy, POCRT postoperative chemoradiotherapy