Table 1.

Clinical features of six lip cancer patients.

Cases	Age	Gender/occupation	Risk factors	Diagnoses	TNMc/clinical staging	Energy/radiotherapy total dose	Follow-up (months)
1	47	Female/teacher	Smoking and sun exposure	SCCa grade Ib	T2N0M0/II	8 MeVe/60 Gyf	60
2	72	Male/rural worker	Smoking and sun exposure	SCC grade II	T2N0M0/II	7 MeV/60 Gy	60
3	67	Female/domestic	Sun exposure	SCC grade II	T1N0M0/I	7 MeV/66 Gy	56
4	69	Female/rural worker	Sun exposure	SCC grade I	T1N0M0/I	7 MeV/60 Gy	50
5	47	Male/rural worker	Alcohol consumption, smoking and sun exposure	SCC grade II	T1N0M0/I	5 MeV/66 Gy	39
6	51	Female/at home	Sun exposure	BCCd	T1N0M0/I	4 MeV/66 Gy	2

^aSCC: squamous cell carcinoma.

^bGrade according to World Health Organization.

^cTNM: tumor-node-metastasis (TNM) staging system.

^dBCC: basal cell carcinoma.

^eMeV: mega electron volts.

^fGy: gray, radiation dose absorbed by human tissue.