Table 1.

PPB PDX frequency and characteristics during propagation

	Engraftment rate (%)	Time to engraftment (Days)*	Time to resection (Days)	Average weight	Average volume
Early	63.16	58.08	77.57	1.43	0.88
Late	87.50	33.85	51.94	1.83	1.03

Table summarizing the frequency and characteristics of secondary tumor formation from PPB PDX and further propagation. During serial propagation of PPB PDX shorter time to tumor engraftment and accelerated tumor growth were noticed. In the comparison between early and late PDX passages time to engraftment

*p = 0.02, Mann–Whitney U test