Fig. 3From: Urachal yolk sac tumor penetrating the bladder as a diagnostic challenge: a case report and review of the literatureA Histological findings from the resected tumor specimen showed a solid trabecular, sporadically glandular and cystically arranged malignant tumor of germinal appearance. B The transition to urothelium was abrupt, without any dysplasia or in situ change of the urotheliumBack to article page