1
|
Capozzi VA, Scarpelli E, Monfardini L, Mandato VD, Merisio C, Uccella S, Sozzi G, Ceccaroni M, Chiantera V, Giordano G, Della Corte L, Conte C, Cianci S, Ghi T, Berretta R. Do Exophytic and Endophytic Patterns in Borderline Ovarian Tumors Have Different Prognostic Implications? A Large Multicentric Experience. J Clin Med 2023; 12:jcm12103544. [PMID: 37240649 DOI: 10.3390/jcm12103544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/12/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
Borderline ovarian tumor (BOT) accounts for 15-20% of all epithelial ovarian tumors. Concerns have arisen about the clinical and prognostic implications of BOT with exophytic growth patterns. We retrospectively reviewed all cases of BOT patients surgically treated from 2015 to 2020. Patients were divided into an endophytic pattern (with intracystic tumor growth and intact ovarian capsule) and an exophytic pattern (with tumor growth outside the ovarian capsule) group. Among the 254 patients recruited, 229 met the inclusion criteria, and of these, 169 (73.8%) belonged to the endophytic group. The endophytic group showed more commonly an early FIGO stage than the exophytic group (100.0% vs. 66.7%, p < 0.001). Furthermore, tumor cells in peritoneal washing (20.0% vs. 0.6%, p < 0.001), elevated Ca125 levels (51.7% vs. 31.4%, p = 0.003), peritoneal implants (0 vs. 18.3%, p < 0.001), and invasive peritoneal implants (0 vs. 5%, p = 0.003) were more frequently observed in the exophytic group. The survival analysis showed 15 (6.6%) total recurrences, 9 (5.3%) in the endophytic and 6 (10.0%) patients in the exophytic group (p = 0.213). At multivariable analysis, age (p = 0.001), FIGO stage (p = 0.002), fertility-sparing surgery (p = 0.001), invasive implants (p = 0.042), and tumor spillage (p = 0.031) appeared significantly associated with recurrence. Endophytic and exophytic patterns in borderline ovarian tumors show superimposable recurrence rates and disease-free survival.
Collapse
Affiliation(s)
- Vito Andrea Capozzi
- Department of Medicine and Surgery, University Hospital of Parma, 43125 Parma, Italy
| | - Elisa Scarpelli
- Department of Medicine and Surgery, University Hospital of Parma, 43125 Parma, Italy
| | - Luciano Monfardini
- Department of Medicine and Surgery, University Hospital of Parma, 43125 Parma, Italy
| | - Vincenzo Dario Mandato
- Unit of Obstetrics and Gynecology, Azienda USL-IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy
| | - Carla Merisio
- Department of Medicine and Surgery, University Hospital of Parma, 43125 Parma, Italy
| | - Stefano Uccella
- Department of Obstetrics and Gynecology, AOUI Verona, University of Verona, 37126 Verona, Italy
| | - Giulio Sozzi
- Department of Gynecologic Oncology, University of Palermo, 90127 Palermo, Italy
| | - Marcello Ceccaroni
- Department of Obstetrics and Gynaecology, Gynaecologic Oncology, and Minimally Invasive Pelvic Surgery, International School of Surgical Anatomy, Sacred Heart Hospital, 37024 Negrar, Italy
| | - Vito Chiantera
- Department of Gynecologic Oncology, University of Palermo, 90127 Palermo, Italy
| | - Giovanna Giordano
- Pathology Unit, Department of Medicine and Surgery, University of Parma, 43125 Parma, Italy
| | - Luigi Della Corte
- Department of Neuroscience, Reproductive Sciences and Dentistry, School of Medicine, University of Naples Federico II, 80131 Naples, Italy
| | - Carmine Conte
- Department of General Surgery and Medical-Surgical Specialties, Institute of Obstetrics and Gynecology, A.O.U. Policlinico Rodolico, San Marco, University of Catania, 95125 Catania, Italy
| | - Stefano Cianci
- Unit of Gynecology and Obstetrics, Department of Human Pathology of Adult and Childhood "G. Barresi", University of Messina, 98121 Messina, Italy
| | - Tullio Ghi
- Department of Medicine and Surgery, University Hospital of Parma, 43125 Parma, Italy
| | - Roberto Berretta
- Department of Medicine and Surgery, University Hospital of Parma, 43125 Parma, Italy
| |
Collapse
|
2
|
Clinicopathologic and Molecular Features of Paired Cases of Metachronous Ovarian Serous Borderline Tumor and Subsequent Serous Carcinoma. Am J Surg Pathol 2020; 43:1462-1472. [PMID: 31343420 DOI: 10.1097/pas.0000000000001325] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Although risk factors have been established for the development of serous carcinoma after a diagnosis of serous borderline tumor (SBT), comprising atypical proliferative serous tumor (APST) (ie, conventional SBT) and noninvasive low-grade serous carcinoma (niLGSC) (ie, micropapillary SBT), subsequent invasive carcinoma still occurs in a subset of women who are not at increased risk. Whether subsequent serous carcinoma in women with a prior SBT represents malignant progression/recurrence or an independent primary tumor is unclear, and the combined clinicopathologic and molecular features of SBTs and their subsequent carcinomas have not been fully characterized. In this study, we analyzed a cohort of 42 women initially diagnosed with SBT who subsequently developed serous carcinoma of a total of 1025 cases of ovarian SBT from a nationwide population-based cohort. Review of the diagnostic slides was performed from this subset of SBTs and matched metachronous invasive serous carcinomas (39 low grade, 3 high grade). DNA was extracted from tissue blocks available for 41 cases (both SBT and carcinoma, n=36; SBT only, n=3; carcinoma only, n=2). Samples were subjected to digital droplet PCR to analyze mutation hotspots in KRAS (codon 12) and BRAF (V600E), which are frequently found in low-grade serous tumors. Eighty-one percent of SBTs (34/42) were APST, and 19% (8/42) were niLGSC. Forty percent of cases (17/42) were FIGO stage I, the majority of which were APST (14/17; 82%). The median time to development of carcinoma was 9 years (range, 0.6 to 25 y). Mutations in SBTs were distributed as follows: 5/39 (13%) BRAF mutant, 22/39 (56%) KRAS mutant, and 12/39 (31%) wild-type for both genes. There was a significant relationship between SBT gene mutation and histologic type, with BRAF mutations occurring exclusively in APST and a higher frequency of niLGSC among SBTs wild-type for BRAF and KRAS (P=0.01). The diffuse presence of tumor cells with abundant eosinophilic cytoplasm was significantly associated with the BRAF mutation (P=0.001). Mutational analyses of matched SBT/carcinoma pairs revealed concordant profiles in 33/36 (92%) cases, of which 19 (53%) were KRAS mutant, 4 (11%) were BRAF mutant, and 10 (28%) were wild type for both genes. The 3 discordant cases consisted of a wild-type niLGSC with a subsequent BRAF-mutant invasive LGSC, a KRAS-mutant APST with a KRAS-mutant LGSC, and a BRAF-mutant APST with subsequent development of a KRAS-mutant high-grade serous carcinoma. In conclusion, some women with SBTs can subsequently develop serous carcinoma, occasionally over 10 years later. Most subsequent carcinomas are low grade, but a small subset can be high grade. The type of gene mutation in SBT correlates with various histologic features. While most cases of serous carcinoma developing after a diagnosis of SBT probably represent tumor progression, a minority are independent primary tumors, presumably arising from endosalpingiosis.
Collapse
|
3
|
Eblen ST. Extracellular-Regulated Kinases: Signaling From Ras to ERK Substrates to Control Biological Outcomes. Adv Cancer Res 2018; 138:99-142. [PMID: 29551131 DOI: 10.1016/bs.acr.2018.02.004] [Citation(s) in RCA: 125] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The extracellular-regulated kinases ERK1 and ERK2 are evolutionarily conserved, ubiquitous serine-threonine kinases that are involved in regulating cellular signaling in both normal and pathological conditions. Their expression is critical for development and their hyperactivation is a major factor in cancer development and progression. Since their discovery as one of the major signaling mediators activated by mitogens and Ras mutation, we have learned much about their regulation, including their activation, binding partners and substrates. In this review I will discuss some of what has been discovered about the members of the Ras to ERK pathway, including regulation of their activation by growth factors and cell adhesion pathways. Looking downstream of ERK activation I will also highlight some of the many ERK substrates that have been discovered, including those involved in feedback regulation, cell migration and cell cycle progression through the control of transcription, pre-mRNA splicing and protein synthesis.
Collapse
Affiliation(s)
- Scott T Eblen
- Medical University of South Carolina, Charleston, SC, United States.
| |
Collapse
|
4
|
Schubert-Fritschle G, Combs SE, Kirchner T, Nüssler V, Engel J. Use of Multicenter Data in a Large Cancer Registry for Evaluation of Outcome and Implementation of Novel Concepts. Front Oncol 2017; 7:234. [PMID: 29046867 PMCID: PMC5632760 DOI: 10.3389/fonc.2017.00234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 09/11/2017] [Indexed: 01/22/2023] Open
Abstract
Large clinical cancer registries (CCRs) in Germany shall be strengthened by the German Social Code Book V (SGB V) and implemented until the end of 2017. There are currently several large cancer registries that support clinical data for outcome analysis and knowledge acquisition. The various examples of the Munich Cancer Registry outlined in this paper present many-sided possibilities using and analyzing registry data. The main objective of population-based cancer registration within a defined area and the performance of outcomes research is to provide feedback regarding the results to the broad public, the reporting doctors, and the scientific community. These tasks determine principles of operation and data usage by CCRs. Each clinical department delivers its own findings and applied therapy. The compilation of these data in CCRs provides information on patient progress through the regional network of medical care and delivers meaningful information on the course of oncological diseases. Successful implementation of CCRs allows for presenting the statistical outcomes of health-care delivery, improving the quality of care within the region, accelerating the process of implementing innovative therapies, and generating new hypotheses as a stimulus for research activities.
Collapse
Affiliation(s)
- Gabriele Schubert-Fritschle
- Munich Cancer Registry (MCR) of the Munich Tumour Centre (TZM), Institute for Medical Information Processing, Biometry and Epidemiology (IBE), University Hospital of Munich, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Stephanie E. Combs
- Munich Tumour Centre (TZM), Medical Faculties, Ludwig-Maximilians-University (LMU) and the Technical University of Munich (TUM), Munich, Germany
- Department of Radiation Oncology, Technische Universität Munich (TUM), Klinikum rechts der Isar, Munich, Germany
- Department of Radiation Sciences (DRS), Institute for Innovative Radiotherapy (iRT), Helmholtz Zentrum Munich, Oberschleißheim, Germany
- Deutsches Konsortium für Translationale Krebsforschung (DKTK), Partner Site Munich, Munich, Germany
| | - Thomas Kirchner
- Munich Tumour Centre (TZM), Medical Faculties, Ludwig-Maximilians-University (LMU) and the Technical University of Munich (TUM), Munich, Germany
- Deutsches Konsortium für Translationale Krebsforschung (DKTK), Partner Site Munich, Munich, Germany
- Institute for Pathology, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Volkmar Nüssler
- Munich Tumour Centre (TZM), Medical Faculties, Ludwig-Maximilians-University (LMU) and the Technical University of Munich (TUM), Munich, Germany
| | - Jutta Engel
- Munich Cancer Registry (MCR) of the Munich Tumour Centre (TZM), Institute for Medical Information Processing, Biometry and Epidemiology (IBE), University Hospital of Munich, Ludwig-Maximilians-University (LMU), Munich, Germany
- Munich Tumour Centre (TZM), Medical Faculties, Ludwig-Maximilians-University (LMU) and the Technical University of Munich (TUM), Munich, Germany
| |
Collapse
|
5
|
Xing D, Suryo Rahmanto Y, Zeppernick F, Hannibal CG, Kjaer SK, Vang R, Shih IM, Wang TL. Mutation of NRAS is a rare genetic event in ovarian low-grade serous carcinoma. Hum Pathol 2017; 68:87-91. [PMID: 28873354 DOI: 10.1016/j.humpath.2017.08.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 08/24/2017] [Accepted: 08/25/2017] [Indexed: 12/31/2022]
Abstract
Activating mutations involving the members of the RAS signaling pathway, including KRAS, NRAS, and BRAF, have been reported in ovarian low-grade serous carcinoma and its precursor lesion, serous borderline tumor (SBT). Whether additional genetic alterations in the RAS oncogene family accumulate during the progression of SBT to invasive low-grade serous carcinoma (LGSC) remains largely unknown. Although mutations of KRAS and BRAF occur at a very early stage of progression, even preceding the development of SBT, additional driving events, such as NRAS mutations, have been postulated to facilitate progression. In this study, we analyzed NRAS exon 3 mutational status in 98 cases that were diagnosed with SBT/atypical proliferative serous tumor, noninvasive LGSC, or invasive LGSC. Of the latter, NRAS Q61R (CAA to CGA) mutations were detected in only 2 of 56 (3.6%) cases. The same mutation was not detected in any of the SBTs (atypical proliferative serous tumors) or noninvasive LGSCs. Mutational analysis for hotspots in KRAS and BRAF demonstrated a wild-type pattern of KRAS and BRAF in one of the NRAS-mutated cases. Interestingly, another LGSC case with NRAS mutation harbored a concurrent BRAF V600L mutation. These findings indicate that, although recurrent NRAS mutations are present, their low prevalence indicates that NRAS plays a limited role in the development of LGSC. Further studies to identify other oncogenic events that drive LGSC progression are warranted.
Collapse
Affiliation(s)
- Deyin Xing
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD 21231
| | - Yohan Suryo Rahmanto
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD 21231
| | - Felix Zeppernick
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD 21231
| | - Charlotte G Hannibal
- Unit of Virus, Lifestyle and Genes, Danish Cancer Society Research Center, Strandboulevarden 49, 2100 Copenhagen, Denmark
| | - Susanne K Kjaer
- Unit of Virus, Lifestyle and Genes, Danish Cancer Society Research Center, Strandboulevarden 49, 2100 Copenhagen, Denmark; Gynecologic Clinic, Juliane Marie Centre, Copenhagen University Hospital, Blegdamsvej 9, 2100 Copenhagen, Denmark
| | - Russell Vang
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD 21231; Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD 21231
| | - Ie-Ming Shih
- Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD 21231; Department of Gynecology and Obstetrics, The Johns Hopkins University School of Medicine, Baltimore, MD 21231.
| | - Tian-Li Wang
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, MD 21231; Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD 21231; Department of Gynecology and Obstetrics, The Johns Hopkins University School of Medicine, Baltimore, MD 21231.
| |
Collapse
|
6
|
Taskova M, Barducci MC, Astakhova K. Environmentally sensitive molecular probes reveal mutations and epigenetic 5-methyl cytosine in human oncogenes. Org Biomol Chem 2017; 15:5680-5684. [DOI: 10.1039/c7ob01147d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
There is currently an unmet need for reliable tools that allow for direct detection and quantification of modifications in genomic DNA.
Collapse
Affiliation(s)
- M. Taskova
- Nucleic Acid Center
- Department of Physics
- Chemistry and Pharmacy
- Odense M 5230
- Denmark
| | - M. C. Barducci
- Nucleic Acid Center
- Department of Physics
- Chemistry and Pharmacy
- Odense M 5230
- Denmark
| | - K. Astakhova
- Nucleic Acid Center
- Department of Physics
- Chemistry and Pharmacy
- Odense M 5230
- Denmark
| |
Collapse
|
7
|
Tone AA, McConechy MK, Yang W, Ding J, Yip S, Kong E, Wong KK, Gershenson DM, Mackay H, Shah S, Gilks B, Tinker AV, Clarke B, McAlpine JN, Huntsman D. Intratumoral heterogeneity in a minority of ovarian low-grade serous carcinomas. BMC Cancer 2014; 14:982. [PMID: 25523272 PMCID: PMC4320586 DOI: 10.1186/1471-2407-14-982] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 12/11/2014] [Indexed: 12/20/2022] Open
Abstract
Background Ovarian low-grade serous carcinoma (LGSC) has fewer mutations than ovarian high-grade serous carcinoma (HGSC) and a less aggressive clinical course. However, an overwhelming majority of LGSC patients do not respond to conventional chemotherapy resulting in a poor long-term prognosis comparable to women diagnosed with HGSC. KRAS and BRAF mutations are common in LGSC, leading to clinical trials targeting the MAPK pathway. We assessed the stability of targetable somatic mutations over space and/or time in LGSC, with a view to inform stratified treatment strategies and clinical trial design. Methods Eleven LGSC cases with primary and recurrent paired samples were identified (stage IIB-IV). Tumor DNA was isolated from 1–4 formalin-fixed paraffin-embedded tumor blocks from both the primary and recurrence (n = 37 tumor and n = 7 normal samples). Mutational analysis was performed using the Ion Torrent AmpliSeqTM Cancer Panel, with targeted validation using Fluidigm-MiSeq, Sanger sequencing and/or Raindance Raindrop digital PCR. Results KRAS (3/11), BRAF (2/11) and/or NRAS (1/11) mutations were identified in five unique cases. A novel, non-synonymous mutation in SMAD4 was observed in one case. No somatic mutations were detected in the remaining six cases. In two cases with a single matched primary and recurrent sample, two KRAS hotspot mutations (G12V, G12R) were both stable over time. In three cases with multiple samplings from both the primary and recurrent surgery some mutations (NRAS Q61R, BRAF V600E, SMAD4 R361G) were stable across all samples, while others (KRAS G12V, BRAF G469V) were unstable. Conclusions Overall, the majority of cases with detectable somatic mutations showed mutational stability over space and time while one of five cases showed both temporal and spatial mutational instability in presumed drivers of disease. Investigation of additional cases is required to confirm whether mutational heterogeneity in a minority of LGSC is a general phenomenon that should be factored into the design of clinical trials and stratified treatment for this patient population. Electronic supplementary material The online version of this article (doi:10.1186/1471-2407-14-982) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - David Huntsman
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada.
| |
Collapse
|
8
|
Heublein S, Mayr D, Friese K, Jarrin-Franco MC, Lenhard M, Mayerhofer A, Jeschke U. The G-protein-coupled estrogen receptor (GPER/GPR30) in ovarian granulosa cell tumors. Int J Mol Sci 2014; 15:15161-72. [PMID: 25167139 PMCID: PMC4200831 DOI: 10.3390/ijms150915161] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 08/15/2014] [Accepted: 08/21/2014] [Indexed: 01/29/2023] Open
Abstract
Ovarian granulosa cell tumors (GCTs) are thought to arise from cells of the ovarian follicle and comprise a rare entity of ovarian masses. We recently identified the G-protein-coupled estrogen receptor (GPER/GPR30) to be present in granulosa cells, to be regulated by gonadotropins in epithelial ovarian cancer and to be differentially expressed throughout folliculogenesis. Thus, supposing a possible role of GPER in GCTs, this study aimed to analyze GPER in GCTs. GPER immunoreactivity in GCTs (n = 26; n (primary diagnosis) = 15, n (recurrence) = 11) was studied and correlated with the main clinicopathological variables. Positive GPER staining was identified in 53.8% (14/26) of GCTs and there was no significant relation of GPER with tumor size or lymph node status. Those cases presenting with strong GPER intensity at primary diagnosis showed a significant reduced overall survival (p = 0.002). Due to the fact that GPER is regulated by estrogens, as well as gonadotropins, GPER may also be affected by endocrine therapies applied to GCT patients. Moreover, with our data supposing GPER to be associated with GCT prognosis, GPER might be considered as a possible confounder when assessing the efficacy of hormone-based therapeutic approaches in GCTs.
Collapse
Affiliation(s)
- Sabine Heublein
- Department of Obstetrics and Gynaecology, Ludwig-Maximilians-University of Munich, Campus Innenstadt, 80337 Munich, Germany; E-Mails: (K.F.); (U.J.)
- Author to whom correspondence should be addressed: E-Mail: ; Tel.: +49-89-4400-54234; Fax: +49-89-4400-54916
| | - Doris Mayr
- Department of Pathology, Ludwig-Maximilians-University of Munich, 80337 Munich, Germany; E-Mails: (D.M.); (M.C.J.-F.)
| | - Klaus Friese
- Department of Obstetrics and Gynaecology, Ludwig-Maximilians-University of Munich, Campus Innenstadt, 80337 Munich, Germany; E-Mails: (K.F.); (U.J.)
- Department of Obstetrics and Gynaecology, Ludwig-Maximilians-University of Munich, Campus Großhadern, 81377 Munich, Germany; E-Mail:
| | - Maria Cristina Jarrin-Franco
- Department of Pathology, Ludwig-Maximilians-University of Munich, 80337 Munich, Germany; E-Mails: (D.M.); (M.C.J.-F.)
| | - Miriam Lenhard
- Department of Obstetrics and Gynaecology, Ludwig-Maximilians-University of Munich, Campus Großhadern, 81377 Munich, Germany; E-Mail:
| | - Artur Mayerhofer
- Department of Anatomy III, Cell Biology, Ludwig-Maximilians-University of Munich, 80336 Munich, Germany; E-Mail:
| | - Udo Jeschke
- Department of Obstetrics and Gynaecology, Ludwig-Maximilians-University of Munich, Campus Innenstadt, 80337 Munich, Germany; E-Mails: (K.F.); (U.J.)
| |
Collapse
|
9
|
Zannoni GF, Improta G, Chiarello G, Pettinato A, Petrillo M, Scollo P, Scambia G, Fraggetta F. Mutational status of KRAS, NRAS, and BRAF in primary clear cell ovarian carcinoma. Virchows Arch 2014; 465:193-8. [PMID: 24889043 DOI: 10.1007/s00428-014-1599-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 03/31/2014] [Accepted: 05/22/2014] [Indexed: 12/24/2022]
Abstract
Ovarian clear cell carcinoma (OCCC) is a subtype of epithelial ovarian cancer with characteristic biological features and aggressive clinical behavior. OCCCs show a pattern of gene mutations different from other type I ovarian malignancies, notably a higher frequency of PIK3CA mutations. In low grade serous ovarian cancer, KRAS and BRAF mutations are frequent, but little data are available on the mutational status of these genes in OCCCs. To clarify this issue, we designed a clinicopathological study with the aim to establish the incidence of KRAS, NRAS, and BRAF hot spot mutations in OCCC. Between December 2006 and June 2012, 22 patients with a proven diagnosis of OCCC were admitted to our Institutions. In all cases, final diagnosis was established according to FIGO and WHO criteria. All women received complete surgical staging. The PyroMark Q24 system (Qiagen GmbH, Hilden, Germany) was used for pyrosequencing analysis of KRAS, NRAS, and BRAF hot spot regions on 2.5-μm sections of formalin-fixed paraffin-embedded tissue from primary OCCC. Pyrosequencing analysis of KRAS, NRAS, and BRAF hot spot regions revealed the presence of mutations only at codon 12 in exon 2 of KRAS in 3 of 22 (14 %) cases. We found no mutations in the hot spot regions of NRAF (exons 2, 3, 4) or BRAF (exon 15). The median age of women with a KRAS mutated OCCC was 74 years. These OCCC were unilateral FIGO stage IA lesions in two cases associated with foci of endometriosis. We conclude that in 14 % of OCCCs, a KRAS mutation occurs in codon 2 exon 2. NRAS and BRAF mutations were not found.
Collapse
Affiliation(s)
- Gian Franco Zannoni
- Department of Pathology, Catholic University of the Sacred Heart, Largo A. Gemelli, 8, Rome, Italy,
| | | | | | | | | | | | | | | |
Collapse
|