Table 1. Clinical summary and imaging findings of patients with perineural spread of adenoid cystic carcinoma in the oral and maxillofacial regions.

Case	Age (years)/sex	Primary tumour location	Left/Right	Clinical symptoms	PNS
					CT	MRI	Histopathological diagnosis
1	29/F	Angle of mandible	L	Trismus	(+)	(+)	(+)
2	27/F	Cheek	L	Paresthesia/trigeminal neuralgia	(+)	(+)	(+)
3	67/M	Palate	R	Swelling	(+)	(+)	(+)
4	62/M	Palate	R	Paresthesia/trigeminal neuralgia	(+)	(+)	(+)
5	64/M	Palate	R	Swelling	(+)	(+)	(+)
6	78/M	Palate	L	Contact pain	(+)	(+)	(+)
7	37/F	Palate	L	Contact pain	(−)	(+)	(+)
8	72/F	Retromolar	L	Paresthesia of tongue	(−)	(+)	(+)
9	68/F	Sublingual gland	L	Paresthesia of tongue	(−)	(−)	(+)
10	79/F	Sublingual gland	L	No symptom	(−)	(−)	(+)
11	64/M	Lower lip	R	No symptom	(−)	(−)	(+)
12	51/F	Sublingual gland	L	Swelling	(−)	(−)	(−)
13	53/F	Upper lip	R	Contact pain	(−)	(−)	(−)

(+), positive findings of PNS; (−), negative findings of PNS; F, female; L, left; M, male; PNS, perineural spread; R, right.