Table I.

Baseline and histological characteristics of testicular tissues collected from nine (pre) pubertal patients.

Organ culture code	Age (years)	Diagnosis	Testicular histology before culture
			Most advanced germ cell	Average Johnsen score #	AMH expression	AR expression
OCID22*	6	Rhabdomyosarcoma	Spermatogonia	2.6	Yes	No
OCID30	8.5	Intracranial, spinal embryonal tumor	Spermatogonia	2.7	Yes	No
OCID25	9	Lymphocytic leukemia	Spermatogonia	2.4	Yes	No
OCID23	10	Rhabdomyosarcoma	Spermatogonia	2.3	Yes	Dim
OCID24	10	Glioma	Spermatogonia	2.9	Yes	No
OCID27	10.5	Anaplastic Large Cell Lymphoma	Spermatogonia	2.9	Yes	No
OCID29 *	11	Rhabdomyosarcoma	Few spermatogonia (<25%)	2.2	Yes	No
OCID26 *	12	Intracranial, spinal embryonal tumor	Few spermatogonia (<25%)	2.2	Yes	No
OCID28	14	M. Hodgkin	Elongating spermatids	6.0	No	Moderate

^*Testicular histological characteristics evaluated in cryopreserved-thawed tissue.

^#Calculation of average Johnsen score (Johnsen, 1970) is described in Supplementary Table SI.