Monarch Disease Ontology identifier MONDO_0005605 (transitional cell papilloma) is a benign papillary neoplasm composed of transitional cells which show preservation of the nuclear polarity. Also known as: papilloma, transitional cell, benign, transitional cell papilloma NOS (morphologic abnormality), transitional cell papilloma, benign, transitional cell papilloma, benign (morphologic abnormality), transitional papilloma.