Table 1.

Distribution of Tumor Types in the Prepubertal Testis Tumor Registry of the Urologic Section of the American Academy of Pediatrics

Tumor Type	No. of Patients (%)
Germ cell
Yolk sac	244 (62)
Teratoma/epidermoid cyst	105 (26)
Stromal
Leydig cell	5 (1)
Sertoli cell	10 (3)
Juvenile granulosa cell	11 (3)
Unspecified stromal	16 (4)
Other
Gonadoblastoma	4 (1)

Data from Ross JH et al. J Urol. 2002;168:1675–1679.⁵