Neuroendocrine neoplasms of the urinary bladder are uncommon tumors represented by small-cell neuroendocrine carcinoma and by fewer cases of large-cell neuroendocrine carcinomas and well-differentiated neuroendocrine tumors. Less than 30 examples of this latter entity have been published so far and consisted of clinically indolent lesions mainly located in the bladder neck arranged in a pseudo-glandular architecture often associated with reactive urothelial changes like cystitis cystica/glandularis. Due to their infrequency, pathologists may face difficulty to recognize this proliferation considering it as part of cystitis cystica/glandularis or misinterpreting it as nested urothelial carcinoma, paraganglioma, or secondary bladder involvement by prostatic adenocarcinoma. Herein the case of a 51-year-old female diagnosed with a well-differentiated neuroendocrine tumor of the bladder immunohistochemically expressing GATA3 is reported, pointing out either the pitfall in the differential diagnosis with cystitis cystica/glandularis, nested urothelial carcinoma, and paraganglioma or its usefulness in the differential diagnosis with prostatic adenocarcinoma.

Well-differentiated neuroendocrine tumor of the urinary bladder expressing GATA 3

Marletta, Stefano;Martignoni, Guido
;
Ghimenton, Claudio;Caliò, Anna
2022-01-01

Abstract

Neuroendocrine neoplasms of the urinary bladder are uncommon tumors represented by small-cell neuroendocrine carcinoma and by fewer cases of large-cell neuroendocrine carcinomas and well-differentiated neuroendocrine tumors. Less than 30 examples of this latter entity have been published so far and consisted of clinically indolent lesions mainly located in the bladder neck arranged in a pseudo-glandular architecture often associated with reactive urothelial changes like cystitis cystica/glandularis. Due to their infrequency, pathologists may face difficulty to recognize this proliferation considering it as part of cystitis cystica/glandularis or misinterpreting it as nested urothelial carcinoma, paraganglioma, or secondary bladder involvement by prostatic adenocarcinoma. Herein the case of a 51-year-old female diagnosed with a well-differentiated neuroendocrine tumor of the bladder immunohistochemically expressing GATA3 is reported, pointing out either the pitfall in the differential diagnosis with cystitis cystica/glandularis, nested urothelial carcinoma, and paraganglioma or its usefulness in the differential diagnosis with prostatic adenocarcinoma.
Cystitis cystica and glandularis; Differential diagnosis; GATA3; Immunohistochemistry; Neuroendocrine tumors
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/1081347
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