title: Renal translocation carcinoma with expression of TFEB: presentation of a case with distinctive histological and immunohistochemical features.
abstract: The authors describe a case of renal cell carcinoma with t(6; 11) (p21; q12) in a 22-year-old man. The tumor showed typical histological features of this neoplasm with 2 types of cells and hyaline nodules surrounded by small cells. Characteristically, the tumor showed cystic lumina with hyaline-papillary structures inside and in some areas large and irregular intratumoral vessels. On immunohistochemical study, the tumoral cells were positive for melanocytic markers and transcription factor EB, as also for AE1-AE3 and Cam5.2 anticytokeratin antibodies. The expression of epithelial markers in this neoplasm is uncommon, and we think it is an important finding because otherwise, if melanocytic markers such as HMB45 or Melan A are not used, some renal cell carcinomas with the t(6; 11) (p21; q12) may be mistaken for other more common renal cell carcinomas.
authors.affiliation: Department of Anatomía Patológica, Hospital de León, León, Spain.
authors.forename: Dimas
authors.initials: D
authors.lastname: Suárez-Vilela
authors.forename: Francisco
authors.initials: F
authors.lastname: Izquierdo-García
authors.forename: José Ramón
authors.initials: JR
authors.lastname: Méndez-Álvarez
authors.forename: Erasmo
authors.initials: E
authors.lastname: Miguélez-García
authors.forename: Francisco
authors.initials: F
authors.lastname: Domínguez-Iglesias
mesh_terms: D000951:Antigens, Neoplasm / Q000378:metabolism; D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors / Q000235:genetics* / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000378:metabolism; D002292:Carcinoma, Renal Cell / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D002880:Chromosomes, Human, Pair 11; D002896:Chromosomes, Human, Pair 6; D006801:Humans; D007680:Kidney Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D008297:Male; D058950:Melanoma-Specific Antigens / Q000378:metabolism; D014178:Translocation, Genetic; D055815:Young Adult
chemical_list: D000951:Antigens, Neoplasm; D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; D014408:Biomarkers, Tumor; D058950:Melanoma-Specific Antigens; C064972:TFEB protein, human