A papillary urinary bladder tumor composed of multilayered hyperchromatic transitional epithelium shows significant nuclear atypia. This type of tumor is best classified as which of the following?
A) Urothelial papilloma
B) Urothelial neoplasm of low malignant potential
C) Papillary urothelial carcinoma, low grade
D) Papillary urothelial carcinoma, high grade
E) Anaplastic carcinoma

Question

Quizplus · Accepted Answer

The World Health Organization/International Society of Urologic Pathology classification of urothelial tumors of the urinary bladder recognizes four categories: urothelial papilloma; urothelial neoplasm of low malignant potential; papillary urothelial carcinoma, low grade; and papillary urothelial carcinoma, high grade. The description of this tumor corresponds to papillary urothelial carcinoma, high grade.

A Papillary Urinary Bladder Tumor Composed of Multilayered Hyperchromatic Transitional