Bladder Flat Lesions

Case ID: 409

Publication date: 12 Feb, 2025

Consensus grade: Carcinoma in situ (CIS)

User	Diagnosis	Difficulty	Comment
Pathologist 1	Carcinoma in situ (CIS)	Typical
Pathologist 2	Atypia/dysplasia	Borderline higher
Pathologist 3	Carcinoma in situ (CIS)	Borderline lower
Pathologist 4	Carcinoma in situ (CIS)	Borderline lower
Pathologist 5	Carcinoma in situ (CIS)	Typical
Pathologist 6	Carcinoma in situ (CIS)	Typical	No specific comment.
Pathologist 7	Carcinoma in situ (CIS)	Typical
Pathologist 8	Atypia/dysplasia	Typical
Pathologist 9	Carcinoma in situ (CIS)	Typical
Pathologist 10	Atypia/dysplasia	Borderline higher
Pathologist 11	Carcinoma in situ (CIS)	Typical
Pathologist 12	Carcinoma in situ (CIS)	Borderline lower
Pathologist 13	Reactive atypia	Borderline higher
Pathologist 14	Carcinoma in situ (CIS)	Typical
Pathologist 15	Carcinoma in situ (CIS)	Borderline higher
Pathologist 16	Carcinoma in situ (CIS)	Typical
Pathologist 17	Carcinoma in situ (CIS)	Typical
Pathologist 18	Carcinoma in situ (CIS)	Typical
Pathologist 19	Atypia/dysplasia	Typical
Pathologist 20	Carcinoma in situ (CIS)	Typical
Pathologist 21	Carcinoma in situ (CIS)	Typical

Case description (by case creator):

The urothelium displays loss of cohesion, loss of polarity and prominent pleomorphism.

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