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

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

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grading to be a significant morphologic<br />

parameter {692,745,1884}. In one series,<br />

5-year survivals for Grade 1, 2 and 3<br />

squamous cell carcinoma was 62%, 52%<br />

and 35%, respectively {692}. This has not<br />

been a uniform finding however {2263}.<br />

One recent study analyzing 154 patients<br />

that underwent cystectomy suggested<br />

that a higher number of newly formed<br />

blood vessels predicts unfavourable disease<br />

outcome {692}.<br />

Genetic predictive factors<br />

Nothing is known on the impact of genetic<br />

changes on the prognosis of SQCC of<br />

the urinary bladder.<br />

Verrucous squamous cell carcinoma<br />

D.J. Grignon<br />

M.N. El-Bolkainy<br />

ICD-O code 8051/3<br />

Verrucous carcinoma is an uncommon<br />

variant of squamous cell carcinoma that<br />

occurs almost exclusively in patients with<br />

schistosomiasis, accounting for 3% to<br />

4.6% of bladder cancers in such a setting<br />

{680,682}. Isolated cases of verrucous<br />

carcinoma of the urinary bladder<br />

have been described in the literature<br />

from non-endemic areas {691,1102,<br />

2772,2851}. This cancer appears as an<br />

exophytic, papillary, or "warty" mass with<br />

epithelial acanthosis and papillomatosis,<br />

minimal nuclear and architectural atypia<br />

and rounded, pushing, deep borders.<br />

Cases having typical verrucous carcinoma<br />

with an infiltrative component are<br />

described and should not be included in<br />

the verrucous carcinoma category<br />

{1603}. In other organs, verrucous carcinoma<br />

has a good prognosis, but results<br />

Fig. 2.53 Verrucous squamous cell carcinoma of<br />

the urinary bladder showing typical exophytic papillary<br />

growth and high degree of differentiation.<br />

in the bladder are limited. Cases of classic<br />

verrucous carcinoma are associated<br />

with minimal risk of progression whether<br />

associated with schistosomiasis or without<br />

{680,691,1102,2772,2851}. Tumours<br />

developing in patients with longstanding<br />

Fig. 2.54 Verrucous squamous cell carcinoma<br />

associated with schistosoma infection.<br />

anogenital condyloma acuminata and<br />

condyloma acuminatum of the urinary<br />

bladder are reported suggesting a possible<br />

link to HPV infection {186,2772}.<br />

Squamous cell papilloma<br />

B. Helpap<br />

ICD-O code 8052/0<br />

Squamous cell papilloma of the urinary<br />

bladder is a very rare benign, proliferative<br />

squamous lesion. It occurs in elderly<br />

women without specific clinical symptoms<br />

{428}. In most cases the cystoscopy<br />

shows a solitary papillary lesion {428}. It<br />

is not associated with human papillomavirus<br />

(HPV) infection.<br />

Histologically, the tumour is composed of<br />

papillary cores covered by benign squamous<br />

epithelium without koilocytic atypia.<br />

Verrucous squamous cell carcinoma / Squamous cell papilloma 127

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