Table 2. Patient data.

Intra-operative Patient Blood Sample*	Volume of blood collected (mls)	Age/Gender	Location	General Site	Path Stage	Overall Stage	Nodal involve-ment	Extra-capsular Spread	Perineural spread	Vascular invasion	Dif-ferentiation	Outcome	# CK+, Vimentin+, Either EGFR, C44, or N-cadherin+/ml of blood	# CK−, Vimentin+, Either EGFR, C44, or N-cadherin+/ml of blood
1 post	15	65M	Gingiva	OC	T4aN0M0	4	0/30	N/A	Absent	Absent	Well	4 m R	3	24
2 post	10.5	56F	BOT	OP	T3N0M0	3	0/1	N/A	Present	Present	Moderate	2 m R	65	176
3 post	11.2	44M	Tonsil	OP	T2N2bM0	4	4/55	Absent	Absent	Absent	Moderate	31 m NED	149	170
4 post	10.2	26F	Tongue	OC	T2N0M0	2	0/22	N/A	Present	Absent	Moderate	2 m R	214	96
5 post	5.5	55M	Tonsil	OP	T2N0M0	2	0/52	N/A	Absent	Absent	Well	39 m NED	748	391
6 pre	10	70F	BOT	OP	T3N2cM0	4	8/30	Present	N/A	N/A	Moderate	4 m R	2171	828
6 post	11.6												3307	3969
7 pre	9.1	57F	Oral	OC	T4N0M0	4	0/32	N/A	Present	Absent	Moderate	36 m NED	243	0
7 post	9												214	0
8 pre	15.4	56M	BOT	OP	T3N2cM0	4	34/43	Present	Present	Present	Moderate	9 m R	915	229
8 post	10.7												2260	0

^*Pre corresponds to sample taken immediately prior to surgical intervention in the OR; Post corresponds to sample taken post- surgical intervention, but still within the OR.

Differentiation.