Table 1. Summary of the patient information of the enrolled cohort of ESCC-PDXs in the present study.

Characteristic	Numbers, n (%)
Age, median [range] years	59 [53–76]
Gender
Male	8 [50]
Female	8 [50]
Stage*
I–II	10 (62.5)
III–IV	6 (37.5)
Differentiation
Low-middle	1 (6.3)
Middle	7 (43.8)
Middle-high	4 [25]
High	4 [25]
Tumor location
Cervical + upper thoracic	1 (6.3)
Middle + lower thoracic	14 (87.5)
Double/multiple primary tumor	1 (6.3)
Tumor length, median (range) cm	5 (3–7.5)
Neoadjuvant treatment
Yes	0 (0)
No	16 [100]

*, UICC 6th. ESCC, esophageal squamous cell carcinoma; PDXs, patient-derived xenografts.