Table 1.

Tumorigenicity of MTC cells

	Clonogenicity in soft agar	Mice with tumor/ mice injected	Latency*, days	Average tumor size, mm†
TT-trkA	6.25%	7/9	24.4§	362§
TT-trkB	1.79%	5/39¶	56§	‡
TT-trkC	6.52%	7/9	34.1	548**
TT-neo	2.88%	27/37	36.2	61.2

^*Calculated from the time of injection until the appearance of a measurable tumor. 

^†Calculated volume of the tumor 60 days after injection. 

^‡Small flat tumors that could not be measured accurately (see text). 

^§p < 0.002 vs. TT-neo. 

^¶p < 0.000002 vs. TT-neo. 

^**p = 0.042 vs. TT-neo.