Thymoma in childhood.
D000293:Adolescent; D006801:Humans; D008297:Male; D013945:Thymoma / Q000000981:diagnostic imaging* / Q000601:surgery; D013953:Thymus Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography