transitional cell carcinoma


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  • Clinical

    • rare, <15 cases reported

  • Histology

    • must be >90% urothelial cells
    • architecture: papillary
    • cytology: high grade
    • often mixed with endometrioid (or serous or clear cell)

  • Stain

    • CK20-
    • half are CK7+

  • Ddx

    • metastasis
    		•