A Collision Tumor of XXXX and @entity1637 : Case Report and Literature Review.

@entity1 @entity35642 @entity1637 @entity5 @entity1358 @entity5822 @entity811 @entity2183 @entity703
OBJECTIVES: The most common @entity703 include clear cell, chromophobe, and @entity1358 ( @entity1358 ) and @entity1637 . While lesions containing hybrid features of different @entity5 types, such as @entity5 , have been well documented in the literature, the finding of a collision @entity5 of two distinct @entity5 types- @entity35642 and @entity1637 -is extremely rare. METHODS: We present a case of @entity35642 associated with an @entity1637 . Our discussion includes a review of the available literature on this rare type of collision @entity5 . RESULTS: Prosection of a partial nephrectomy performed in a 78-year-old @entity1 for painless gross @entity811 and @entity2183 revealed a 6.4 * 5 * 3.6-cm well-delineated orange to yellow-tan mass harboring a white-tan 1 * 0.9 * 0.9-cm mass. Histologic diagnosis of @entity35642 associated with an @entity1637 was rendered. By immunohistochemistry, focal @entity5822 expression was present in the @entity1637 , while strong diffuse positive @entity5822 expression was present in the @entity35642 component. Fluorescence in situ hybridization (FISH) revealed trisomy 17 in 39.3% of @entity35642 @entity5 nuclei but no significant chromosomal aberration in @entity1637 . CONCLUSIONS: In view of this and previously reported cases, thorough sectioning and examination, especially in large @entity1637 , is recommended to exclude the presence of an associated @entity5 . To our knowledge, trisomy 17 by FISH has not been previously reported in these extremely rare @entity5 .
