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Eble JN, Sauter G., Epstein JI, Sesterhenn IA - iarc

Eble JN, Sauter G., Epstein JI, Sesterhenn IA - iarc

Eble JN, Sauter G., Epstein JI, Sesterhenn IA - iarc

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In spite of the overall orderly appearance,<br />

there are tumours that show focal<br />

high grade areas and in these cases the<br />

tumour should be classified as a high<br />

grade tumour.<br />

Expression of cytokeratin 20, CD44, p53<br />

and p63 immunostaining is intermediate<br />

between that of PUNLMP and non-invasive<br />

high grade papillary urothelial carcinoma<br />

{600,2678}. The tumours are usually<br />

diploid {2071}.<br />

Prognosis<br />

Progression to invasion and cancer<br />

death occurs in less than 5% of cases. In<br />

contrast, recurrence is common and<br />

occurs in 48-71% of the patients {69,<br />

1104,1110}.<br />

Fig. 2.40 Flow chart of the differential diagnosis of non-invasive papillary urothelial tumours.<br />

Non-invasive papillary urothelial<br />

carcinoma, high grade<br />

V.E. Reuter<br />

Definition<br />

A neoplasm of urothelium lining papillary<br />

fronds which shows a predominant pattern<br />

of disorder with moderate-to-marked<br />

architectural and cytologic atypia.<br />

ICD-O code 8130/23<br />

Clinical symptoms<br />

Gross or microscopic hematuria is the<br />

main symptom. The endoscopic appearance<br />

varies from papillary to nodular/<br />

solid sessile lesions. Patients may have<br />

single or multiple tumours.<br />

Histopathology<br />

The tumour is characterized by a papillary<br />

architecture in which the papillae are<br />

frequently fused and branching,<br />

although some may be delicate. It shows<br />

a predominant pattern of disorder with<br />

easily recognizable variations in archi-<br />

A<br />

B<br />

Fig. 2.41 Non-invasive papillary urothelial carcinoma, high grade. A The papillary fronds are partially fused and lined by markedly atypical and pleomorphic urothelial<br />

cells, some of which have exfoliated. B The architecture is disordered and there is marked nuclear pleomorphism and hyperchromasia. Mitotic figures are readily<br />

visible away from the basement membrane. C The nuclei have open chromatin, irregular nuclear contours and variably prominent nucleoli. There is total lack of<br />

polarization and maturation.<br />

C<br />

Non-invasive papillary urothelial carcinoma, high grade 117

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