Table 1. Characteristics of tissue samples used for primary cell culture.

Patienta	Established cultured cells	Sex	Age (years)	Site	TNM stage	Cell differentiation
A	adjacent noncancerous	male	50	tongue	T2N0M0	moderate
B	cancerous	male	43	buccal mucosa	T2N0M0	moderate
C	cancerous	male	51	floor of mouth	T2N0M0	moderate

^a The primary culture of cancerous cells for the patient A was unsuccessful. The primary culture of adjacent noncancerous epithelial cells for patients B and C failed