title: Sarcomatoid renal cell carcinoma with rhabdoid features.
abstract: Sarcomatoid renal cell carcinoma (SRCC) with rhabdoid features is a rare tumor with aggressive behavior and poor prognosis. We report a case of a 71-year-old man with a large left-sided renal mass. Nephrectomy specimen revealed clear cell carcinoma with sarcomatoid and rhabdoid tumor cells. The rhabdoid cells were immunoreactive for mesenchymal markers such as vimentin, epithelial markers such as cytokeratin, and epithelial membrane antigen. These cells were also positive for p53 and had a high proliferation index. The rhabdoid component also demonstrated the loss of immunostaining for integrase interactor 1 (INI1), which stained the other components of the tumor. Only a few cases are available in the published reports documenting rhabdoid cells in SRCC. None of these cases were studied by INI1 immunostain.
authors.affiliation: Dr. Mohammed Akhtar, King Faisal Specialist Hospital and Research Center, Pathology & Laboratory Medicine, DPLM, MBC 10 PO Box 3354 Riyadh 11211 Saudi Arabia, T: +966-11-4424280, F: +966-11-4424280, makhtar69@kfshrc.edu.sa.
authors.forename: Nagla Ahmed
authors.initials: NA
authors.lastname: Al-Saidi
authors.forename: Mohammed
authors.initials: M
authors.lastname: Akhtar
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism; D002292:Carcinoma, Renal Cell / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D002868:Chromosomal Proteins, Non-Histone / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000378:metabolism; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D008297:Male; D009392:Nephrectomy; D018335:Rhabdoid Tumor / Q000175:diagnosis / Q000473:pathology* / Q000601:surgery; D000071796:SMARCB1 Protein; D012509:Sarcoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D014157:Transcription Factors / Q000378:metabolism
chemical_list: D014408:Biomarkers, Tumor; D002868:Chromosomal Proteins, Non-Histone; D004268:DNA-Binding Proteins; D000071796:SMARCB1 Protein; C513266:SMARCB1 protein, human; D014157:Transcription Factors