Table 2. Clinicopathological characteristics of the 4 patients included.

Study No.	Demographic information	Tumor site	Tumor size	TNM stage	Pathological features	Follow-up (Months)
Patient 1	Male, 35 years, Asian	tongue	Ulceration, a diameter of 1.0 cm	T1N0M0	Well-differentiated SCC, no lymph node metastasis, 0.5 cm depth of invasion	No recurrence, 16 months
Patient 2	Male, 37 years, Asian	tongue	Ulceration, a diameter of 1.8 cm	T1N0M0	Well-moderately differentiated SCC, no lymph node metastasis, 0.5 cm depth of invasion	No recurrence, 19 months
Patient 3	Male, 47 years, Asian	tongue	Ulceration, a diameter of 1.3 cm	T1N0M0	Well-moderately differentiated SCC, no lymph node metastasis, 0.6 cm depth of invasion	No recurrence, 14 months
Patient 4	Male, 34 years, Asian	tongue	Ulceration, a diameter of 1.8 cm	T1N0M0	Well-moderately invasion depth SCC, no lymph node metastasis, 0.5 cm depth of invasion	No recurrence, 15 months

SCC, squamous cell carcinoma.