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Adeniran AJ, Shuch B, Humphrey PA. Sarcomatoid and Rhabdoid Renal Cell Carcinoma: Clinical, Pathologic, and Molecular Genetic Features. Am J Surg Pathol 2024; 48:e65-e88. [PMID: 38736105 DOI: 10.1097/pas.0000000000002233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2024]
Abstract
Renal cell carcinoma (RCC) with sarcomatoid and rhabdoid morphologies has an aggressive biological behavior and a typically poor prognosis. The current 2022 WHO classification of renal tumors does not include them as distinct histologic entities but rather as transformational changes that may arise in a background of various distinct histologic types of RCC. The sarcomatoid component shows malignant spindle cells that may grow as intersecting fascicles, which is reminiscent of pleomorphic undifferentiated sarcoma. The rhabdoid cells are epithelioid cells with eccentrically located vesicular nuclei with prominent nucleoli and large intracytoplasmic eosinophilic inclusions. Studies have shown that RCCs with sarcomatoid and rhabdoid differentiation have distinctive molecular features. Sarcomatoid RCC harbors shared genomic alterations in carcinomatous and rhabdoid components, but also enrichment of specific genomic alterations in the sarcomatoid element, suggesting molecular pathways for development of sarcomatoid growth from a common clonal ancestor. Rhabdoid differentiation also arises through clonal evolution although less is known of specific genomic alterations in rhabdoid cells. Historically, treatment has lacked efficacy, although recently immunotherapy with PD-1/PD-L1/CTLA-4 inhibitors has produced significant clinical responses. Reporting of sarcomatoid and rhabdoid features in renal cell carcinoma is required by the College of American Pathologists and the International Collaboration on Cancer Reporting. This manuscript reviews the clinical, pathologic, and molecular features of sarcomatoid RCC and rhabdoid RCC with emphasis on the morphologic features of these tumors, significance of diagnostic recognition, the molecular mechanisms of tumorigenesis and differentiation along sarcomatoid and rhabdoid lines, and advances in treatment, particularly immunotherapy.
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Affiliation(s)
| | - Brian Shuch
- Department of Urology, University of California Los Angeles, Los Angeles, CA
| | - Peter A Humphrey
- Department of Pathology, Yale University School of Medicine, New Haven, CT
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Akgul M, Sangoi AR, Williamson SR. GATA3 in Renal Neoplasms: Increased Utility and Potential Pitfalls. Int J Surg Pathol 2024; 32:365-367. [PMID: 37248558 DOI: 10.1177/10668969231177883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- Mahmut Akgul
- Pathology and Laboratory Medicine, Albany Medical Center, Albany, NY, USA
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Collins K, Acosta AM, Siegmund SE, Cheng L, Hirsch MS, Idrees MT. Genetic Profiling Uncovers Genome-Wide Loss of Heterozygosity and Provides Insight into Mechanisms of Sarcomatoid Transformation in Chromophobe Renal Cell Carcinoma. Mod Pathol 2024; 37:100396. [PMID: 38043790 DOI: 10.1016/j.modpat.2023.100396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 11/07/2023] [Accepted: 11/26/2023] [Indexed: 12/05/2023]
Abstract
Sarcomatoid transformation occurs in ∼8% of chromophobe renal cell carcinoma (chRCC) and is associated with aggressive clinical behavior. In recent years, several studies have identified genomic, transcriptomic, and epigenomic correlates of aggressive behavior in chRCC; however, the molecular mechanisms associated with sarcomatoid transformation remain incompletely understood. In this study, we analyzed paired conventional and sarcomatoid histologic components of individual chRCC to elucidate the genomic alterations that underlie sarcomatoid transformation in this tumor type. Massively parallel sequencing was performed on paired (conventional and sarcomatoid) components from 8 chRCCs. All cases harbored TP53 variants (87.5% showing TP53 variants in both components and 12.5% only in the sarcomatoid component). Intratumor comparisons revealed that TP53 variants were concordant in 71% and discordant in 29% of cases. Additional recurrent single-nucleotide variants were found in RB1 (37.5% of cases) and PTEN (25% of cases), with the remaining single-nucleotide variants detected in these tumors (PBRM1, NF1, and ASXL1) being nonrecurrent. Copy number variant analysis showed the characteristic pattern of chromosomal losses associated with chRCC (1, 2, 6, 10, 13, 17, and 21) in the conventional histologic components only. Interestingly, the sarcomatoid components of these tumors demonstrated widespread loss of heterozygosity but lacked the above chromosomal losses, likely as a consequence of whole-genome duplication/imbalanced chromosomal duplication events. Overall, the findings suggest that TP53 variants followed by whole-genome duplication/imbalanced chromosomal duplication events underlie sarcomatoid transformation in chRCC.
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Affiliation(s)
- Katrina Collins
- Department of Pathology, Indiana University School of Medicine, Indianapolis, Indiana.
| | - Andres M Acosta
- Department of Pathology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Stephanie E Siegmund
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Liang Cheng
- Department of Pathology, Warren Alpert Medical School of Brown University, Lifespan Academic Medical Center, Providence, Rhode Island
| | - Michelle S Hirsch
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Muhammad T Idrees
- Department of Pathology, Indiana University School of Medicine, Indianapolis, Indiana
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Henske EP, Cheng L, Hakimi AA, Choueiri TK, Braun DA. Chromophobe renal cell carcinoma. Cancer Cell 2023; 41:1383-1388. [PMID: 37541245 DOI: 10.1016/j.ccell.2023.07.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 08/06/2023]
Abstract
Chromophobe renal cell carcinoma (ChRCC) is the second most common variant histology (non-clear cell) RCC. ChRCC is distinct from clear cell RCC (ccRCC) in terms of genetics, genomics, metabolism, cell of origin, and response to targeted and immune therapies. The pathogenesis of ChRCC remains unclear, but current data suggest two potential mechanisms: mTORC1 hyperactivation through PTEN pathway mutations and mitochondrial dysfunction leading to oxidative stress. There are no specific approved treatments for ChRCC, although some responses to tyrosine kinase and mTOR inhibitors have been observed. Response to immunotherapy is generally limited. Targetable pathways involving innate lymphoid cells/IL-15 and cysteine homeostasis/ferroptosis have recently been identified.
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Affiliation(s)
| | - Liang Cheng
- Brown University Warren Alpert Medical School and the Legorreta Cancer Center, Brown University, Providence, RI, USA
| | - A Ari Hakimi
- Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Toni K Choueiri
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - David A Braun
- Yale Cancer Center, Yale School of Medicine, New Haven, CT, USA
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Hahn AW, Lebenthal J, Genovese G, Sircar K, Tannir NM, Msaouel P. The significance of sarcomatoid and rhabdoid dedifferentiation in renal cell carcinoma. Cancer Treat Res Commun 2022; 33:100640. [PMID: 36174377 DOI: 10.1016/j.ctarc.2022.100640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/12/2022] [Accepted: 09/21/2022] [Indexed: 12/14/2022]
Abstract
Dedifferentiation in renal cell carcinoma (RCC), either sarcomatoid or rhabdoid, is an infrequent event that may occur heterogeneously in the setting of any RCC histology and is associated with poor outcomes. Sarcomatoid dedifferentiation is associated with inferior survival with angiogenesis targeted therapy and infrequent responses to cytotoxic chemotherapy. However, immune checkpoint therapy has significantly improved outcomes for patients with sarcomatoid dedifferentiation. Biologically, sarcomatoid dedifferentiation has increased programmed death-ligand 1 (PD-L1) expression and an inflamed tumor microenvironment, in addition to other distinct molecular alterations. Less is known about rhabdoid dedifferentiation from either a clinical, biological, or therapeutic perspective. In this focused review, we will discuss the prognostic implications, outcomes with systemic therapy, and underlying biology in RCC with either sarcomatoid or rhabdoid dedifferentiation present.
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Affiliation(s)
- Andrew W Hahn
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America.
| | - Justin Lebenthal
- Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America
| | - Giannicola Genovese
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America; Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America
| | - Kanishka Sircar
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America; Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America
| | - Nizar M Tannir
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America
| | - Pavlos Msaouel
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America; Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States of America.
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