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ISSN: 1233-9687
Polish Journal of Pathology
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2/2014
vol. 65
 
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abstract:

Review of renal tumors associated with Birt-Hogg-Dubé syndrome with focus on clinical and pathobiological aspects

Naoto Kuroda
,
Mitsuko Furuya
,
Yoji Nagashima
,
Hiroko Gotohda
,
Fumi Kawakami
,
Suzuko Moritani
,
Satoshi Ota
,
Milan Hora
,
Michal Michal
,
Ondrej Hes
,
Yukio Nakatani

Pol J Pathol 2014; 65 (2): 93-99
DOI: https://doi.org/10.5114/pjp.2014.43958
Online publish date: 2014/07/28
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Birt-Hogg-Dubé syndrome (BHDS) is an autosomal dominant inherited disorder characterized by clinical features of skin lesions, pulmonary lesions and renal tumor. The gene responsible for this syndrome is located on chromosome 17p11.2 and designated as FLCN. In this article, we review renal tumors associated with BHDS with a focus on clinical and pathobiological aspects. Renal tumors often occur multifocally or bilaterally in the imaging analyses or gross examination. Histological examination of renal tumors includes a variety of subtypes such as hybrid oncocytic tumor, chromophobe renal cell carcinoma (RCC), oncocytoma, clear cell RCC and papillary RCC. The histologic discordance in multiple tumors seems to be characteristic of this syndrome. Oncocytosis is observed histologically in about half of the cases. Several investigations have elucidated that folliculin may be involved in the mammalian target of rapamycin (mTOR) pathway recently. Renal tumors composed of clear cells may behave in an aggressive fashion. However, renal tumors including hybrid oncocytic tumor, chromophobe RCC and oncocytoma behave mostly in an indolent fashion.
keywords:

review, renal tumor, Birt-Hogg-Dubé syndrome
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