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Onuzo CN, Gordon AS, Amoatwo JKA, Kuti CK, Taylor P, Sefogah PE. A giant 25 litre volume ovarian cystic mucinous borderline ovarian tumour with intraepithelial carcinoma in a 24-year-old nulliparous woman: Case report. Int J Surg Case Rep 2024; 119:109732. [PMID: 38754159 PMCID: PMC11109311 DOI: 10.1016/j.ijscr.2024.109732] [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: 02/04/2024] [Revised: 04/30/2024] [Accepted: 05/02/2024] [Indexed: 05/18/2024] Open
Abstract
INTRODUCTION AND IMPORTANCE Giant ovarian cysts are rare and usually pose significant diagnostic challenges especially in adolescents and young adults. There is limited report of such cases reported in existing literature with hardly any cases published from the Sub-Sharan African region. CASE PRESENTATION We present the case of a 24-year-old young woman who reported to our gynaecology clinic on the 23rd of January 2023 with a year's history of a progressively increasing abdominopelvic mass. She was successfully managed surgically and made smooth recovery. CLINICAL DISCUSSION Based on the history and examination findings, confirmed the diagnosis clinically with abdomino-pelvic ultrasound scan, removed the tumour surgically and undertook histopathological studies to confirm a benign disease. To the best of our knowledge, our successful management of this patient is the first case of such a huge borderline ovarian tumour reported in Ghana and the Sub-Saharan African region to inform clinicians on safe surgical management in our context. CONCLUSION Our successful management of this giant mucinous BOT reiterates the fact that in the absence of precise prognostic marker of malignancy, clinicians should always balance the oncologic safety of the patient against less radical treatment modality.
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Affiliation(s)
- Chibuikem N Onuzo
- Department of Obstetrics and Gynaecology, University of Ghana Medical Center, Legon, Accra, Ghana
| | - Afua S Gordon
- Department of Obstetrics and Gynaecology, University of Ghana Medical Center, Legon, Accra, Ghana
| | - Jacob K A Amoatwo
- Department of Obstetrics and Gynaecology, University of Ghana Medical Center, Legon, Accra, Ghana
| | - Christiana K Kuti
- Department of Obstetrics and Gynaecology, University of Ghana Medical Center, Legon, Accra, Ghana
| | - Peter Taylor
- Department of Obstetrics and Gynaecology, University of Ghana Medical Center, Legon, Accra, Ghana
| | - Promise E Sefogah
- Department of Obstetrics and Gynaecology, University of Ghana Medical School, Korle Bu, Accra, Ghana.
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Yu X, Zou Y, Wang L, Yang H, Jiao J, Yu H, Zhang S. Radiomics nomogram for preoperative differentiation of early-stage serous borderline ovarian tumors and serous malignant ovarian tumors. Front Oncol 2024; 13:1269589. [PMID: 38288103 PMCID: PMC10822955 DOI: 10.3389/fonc.2023.1269589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 12/18/2023] [Indexed: 01/31/2024] Open
Abstract
Objectives This study aimed to construct a radiomics nomogram and validate its performance in the preoperative differentiation between early-stage (I and II) serous borderline ovarian tumors (SBOTs) and serous malignant ovarian tumors (SMOTs). Methods Data were collected from 80 patients with early-stage SBOTs and 102 with early-stage SMOTs (training set: n = 127; validation set: n = 55). Univariate and multivariate analyses were performed to identify the independent clinicoradiological factors. A radiomics signature model was constructed using radiomics features extracted from multidetector computed tomography images of the venous phase, in which the least absolute shrinkage and selection operator regression was employed to lessen the dimensionality of the data and choose the radiomics features. A nomogram model was established by combining independent clinicoradiological factors with the radiomics signature. The performance of nomogram calibration, discrimination, and clinical usefulness was evaluated using training and validation sets. Results In terms of clinicoradiological characteristics, age (p = 0.001), the diameter of the solid component (p = 0.009), and human epididymis protein 4 level (p < 0.001) were identified as the independent risk factors of SMOT, for which the area under the curves (AUCs) were calculated to be 0.850 and 0.836 in the training and validation sets, respectively. Nine features were finally selected to construct the radiomics signature model, which exhibited AUCs of 0.879 and 0.826 for the training and validation sets, respectively. The nomogram model demonstrated considerable calibration and discrimination with AUCs of 0.940 and 0.909 for the training and validation sets, respectively. The nomogram model displayed more prominent clinical usefulness than the clinicoradiological and radiomics signature models according to the decision curve analysis. Conclusions The nomogram model can be employed as an individualized preoperative non-invasive tool for differentiating early-stage SBOTs from SMOTs.
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Affiliation(s)
- Xinping Yu
- Department of Gynecology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yuwei Zou
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Lei Wang
- Department of Gynecology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Hongjuan Yang
- Department of Gynecology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Jinwen Jiao
- Department of Gynecology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Haiyang Yu
- Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shuai Zhang
- Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China
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Akçay A, Peker AA, Oran Z, Toprak H, Toluk Ö, Balsak S, Badur BA, Gültekin MA. Role of magnetic resonance imaging to differentiate between borderline and malignant serous epithelial ovarian tumors. Abdom Radiol (NY) 2024; 49:229-236. [PMID: 37857912 DOI: 10.1007/s00261-023-04076-9] [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: 08/09/2023] [Revised: 09/20/2023] [Accepted: 09/20/2023] [Indexed: 10/21/2023]
Abstract
PURPOSE We aimed to differentiate serous borderline ovarian tumors (SBOT) from serous epithelial ovarian carcinomas (SEOC) using morphological and functional MRI findings, to improve the patient management. METHOD We retrospectively investigated 24 ovarian lesions diagnosed with SBOT and 64 ovarian lesions diagnosed with SEOC. Additional to the demographic and morphological findings T2W signal intensity ratio, mean apparent diffusion coefficient (ADCmean) and total apparent diffusion coefficient (ADCtotal) values were analyzed and compared between two groups. RESULTS Bilaterality, pelvic free fluid presence, serum CA-125 level (U/mL), presence of pelvic peritoneal implant were in favor of SEOC. Lower maximum size of solid component and solid size to maximum size ratio, dominantly cystic and solid-cystic appearance, exophytic growth pattern, presence of papiller projection and papillary architecture and internal branching pattern, higher T2W signal intensity ratio, ADCmean and ADCtotal values were in favor of SBOT. CONCLUSION Our study revealed that morphological and functional imaging findings were valuable in differentiating BSOT from SEOC.
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Affiliation(s)
- Ahmet Akçay
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, +34093, Istanbul, Turkey.
| | - Abdusselim Adil Peker
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, +34093, Istanbul, Turkey
| | - Zeynep Oran
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, +34093, Istanbul, Turkey
| | - Hüseyin Toprak
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, +34093, Istanbul, Turkey
| | - Özlem Toluk
- Department of Biostatistics, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
| | - Serdar Balsak
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, +34093, Istanbul, Turkey
| | - Bahar Atasoy Badur
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, +34093, Istanbul, Turkey
| | - Mehmet Ali Gültekin
- Department of Radiology, Faculty of Medicine, Bezmialem Vakif University, +34093, Istanbul, Turkey
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Moon MH, Park HS, Kim YJ, Yu MH, Park S, Jung SI. Computed Tomography Indicators for Differentiating Stage 1 Borderline Ovarian Tumors from Stage I Malignant Epithelial Ovarian Tumors. Diagnostics (Basel) 2023; 13:diagnostics13030480. [PMID: 36766584 PMCID: PMC9914279 DOI: 10.3390/diagnostics13030480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/20/2023] [Accepted: 01/23/2023] [Indexed: 01/31/2023] Open
Abstract
Preoperative diagnosis of borderline ovarian tumors (BOTs) is of increasing concern. This study aimed to determine computed tomography (CT) features in differentiating stage 1 BOTs from stage I malignant epithelial ovarian tumors (MEOTs). A total of 170 ovarian masses (97 BOTs and 73 MEOTs) from 141 consecutive patients who underwent preoperative CT imaging were retrospectively analyzed. Two readers independently and retrospectively reviewed quantitative and qualitative CT features. Multivariate logistic analysis demonstrated that a larger tumor size (p = 0.0284 for reader 1, p = 0.0391 for reader 2) and a smaller solid component (p = 0.0007 for reader 1, p = 0.0003 for reader 2) were significantly associated with BOTs compared with MEOTs. In the subanalysis of cases with a solid component, smaller (p = 0.0092 for reader 1, p = 0.0014 for reader 2) and ill-defined (p = 0.0016 for reader 1, p = 0.0414 for reader 2) solid component was significantly associated with BOTs compared with MEOTs. Tumor size and the size and margin of the solid component were useful for differentiating stage 1 BOTs from stage 1 MEOTs on CT images.
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Affiliation(s)
- Min Hoan Moon
- Department of Radiology, Seoul National University Seoul Metropolitan Government Boramae Medical Center, Seoul National University College of Medicine, 5 Gil 20, Boramae-Road, Dongjak-Gu, Seoul 07061, Republic of Korea
| | - Hee Sun Park
- Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1, Neungdong-ro, Gwangjin-gu, Seoul 05030, Republic of Korea
| | - Young Jun Kim
- Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1, Neungdong-ro, Gwangjin-gu, Seoul 05030, Republic of Korea
| | - Mi Hye Yu
- Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1, Neungdong-ro, Gwangjin-gu, Seoul 05030, Republic of Korea
| | - Sungeun Park
- Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1, Neungdong-ro, Gwangjin-gu, Seoul 05030, Republic of Korea
| | - Sung Il Jung
- Department of Radiology, Konkuk University Medical Center, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1, Neungdong-ro, Gwangjin-gu, Seoul 05030, Republic of Korea
- Correspondence:
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Gong XQ, Zhang Y. Develop a nomogram to predict overall survival of patients with borderline ovarian tumors. World J Clin Cases 2022; 10:2115-2126. [PMID: 35321187 PMCID: PMC8895192 DOI: 10.12998/wjcc.v10.i7.2115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/17/2022] [Accepted: 02/23/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The prognosis of borderline ovarian tumors (BOTs) has been the concern of clinicians and patients. It is urgent to develop a model to predict the survival of patients with BOTs.
AIM To construct a nomogram to predict the likelihood of overall survival (OS) in patients with BOTs.
METHODS A total of 192 patients with histologically verified BOTs and 374 patients with epithelial ovarian cancer (EOC) were retrospectively investigated for clinical characteristics and survival outcomes. A 1:1 propensity score matching (PSM) analysis was performed to eliminate selection bias. Survival was analyzed by using the log-rank test and the restricted mean survival time (RMST). Next, univariate and multivariate Cox regression analyses were used to identify meaningful independent prognostic factors. In addition, a nomogram model was developed to predict the 1-, 3-, and 5-year overall survival of patients with BOTs. The predictive performance of the model was assessed by using the concordance index (C-index), calibration curves, and decision curve analysis (DCA).
RESULTS For clinical data, there was no significant difference in body mass index, preoperative CA199 concentration, or tumor localization between the BOTs group and EOC group. Women with BOTs were significantly younger than those with EOC. There was a significant difference in menopausal status, parity, preoperative serum CA125 concentration, Federation International of gynecology and obstetrics (FIGO) stage, and whether patients accepted postoperative adjuvant therapy between the BOT and EOC group. After PSM, patients with BOTs had better overall survival than patients with EOC (P value = 0.0067); more importantly, the 5-year RMST of BOTs was longer than that of EOC (P value = 0.0002, 95%CI -1.137 to -0.263). Multivariate Cox regression analysis showed that diagnosed age and surgical type were independent risk factors for BOT patient OS (P value < 0.05). A nomogram was developed based on diagnosed age, preoperative serum CA125 and CA199 Levels, surgical type, FIGO stage, and tumor size. Moreover, the c-index (0.959, 95% confidence interval 0.8708–1.0472), calibration plot of 1-, 3-, and 5-year OS, and decision curve analysis indicated the accurate predictive ability of this model.
CONCLUSION Patients with BOTs had a better prognosis than patients with EOC. The nomogram we constructed might be helpful for clinicians in personalized treatment planning and patient counseling.
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Affiliation(s)
- Xiao-Qin Gong
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
| | - Yan Zhang
- Department of Gynecology and Obstetrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
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Song H, Bak S, Kim I, Woo JY, Cho EJ, Choi YJ, Rha SE, Oh SA, Youn SY, Lee SJ. An Application of Machine Learning That Uses the Magnetic Resonance Imaging Metric, Mean Apparent Diffusion Coefficient, to Differentiate between the Histological Types of Ovarian Cancer. J Clin Med 2021; 11:jcm11010229. [PMID: 35011970 PMCID: PMC8745699 DOI: 10.3390/jcm11010229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/21/2021] [Accepted: 12/29/2021] [Indexed: 12/13/2022] Open
Abstract
This retrospective single-center study included patients diagnosed with epithelial ovarian cancer (EOC) using preoperative pelvic magnetic resonance imaging (MRI). The apparent diffusion coefficient (ADC) of the axial MRI maps that included the largest solid portion of the ovarian mass was analysed. The mean ADC values (ADCmean) were derived from the regions of interest (ROIs) of each largest solid portion. Logistic regression and three types of machine learning (ML) applications were used to analyse the ADCs and clinical factors. Of the 200 patients, 103 had high-grade serous ovarian cancer (HGSOC), and 97 had non-HGSOC (endometrioid carcinoma, clear cell carcinoma, mucinous carcinoma, and low-grade serous ovarian cancer). The median ADCmean of patients with HGSOC was significantly lower than that of patients without HGSOCs. Low ADCmean and CA 19-9 levels were independent predictors for HGSOC over non-HGSOC. Compared to stage I disease, stage III disease was associated with HGSOC. Gradient boosting machine and extreme gradient boosting machine showed the highest accuracy in distinguishing between the histological findings of HGSOC versus non-HGSOC and between the five histological types of EOC. In conclusion, ADCmean, disease stage at diagnosis, and CA 19-9 level were significant factors for differentiating between EOC histological types.
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Affiliation(s)
- Heekyoung Song
- Department of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea; (H.S.); (S.B.); (I.K.); (J.Y.W.); (E.J.C.); (Y.J.C.)
| | - Seongeun Bak
- Department of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea; (H.S.); (S.B.); (I.K.); (J.Y.W.); (E.J.C.); (Y.J.C.)
| | - Imhyeon Kim
- Department of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea; (H.S.); (S.B.); (I.K.); (J.Y.W.); (E.J.C.); (Y.J.C.)
| | - Jae Yeon Woo
- Department of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea; (H.S.); (S.B.); (I.K.); (J.Y.W.); (E.J.C.); (Y.J.C.)
| | - Eui Jin Cho
- Department of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea; (H.S.); (S.B.); (I.K.); (J.Y.W.); (E.J.C.); (Y.J.C.)
| | - Youn Jin Choi
- Department of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea; (H.S.); (S.B.); (I.K.); (J.Y.W.); (E.J.C.); (Y.J.C.)
| | - Sung Eun Rha
- Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea;
| | - Shin Ah Oh
- NAVER Clova, 246, Hwangsaeul-ro, Bundang-gu, Seongnam-si 13595, Korea;
| | - Seo Yeon Youn
- Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea;
- Correspondence: (S.Y.Y.); (S.J.L.)
| | - Sung Jong Lee
- Department of Obstetrics and Gynecology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul 06591, Korea; (H.S.); (S.B.); (I.K.); (J.Y.W.); (E.J.C.); (Y.J.C.)
- Correspondence: (S.Y.Y.); (S.J.L.)
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Zhu J, Yang Z, Tang R, Tang G. Comparison of pathological, radiological, and prognostic features between cellular schwannoma and non-cellular schwannoma. Eur J Radiol 2021; 141:109783. [PMID: 34049057 DOI: 10.1016/j.ejrad.2021.109783] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 04/24/2021] [Accepted: 05/18/2021] [Indexed: 11/16/2022]
Abstract
PURPOSE To investigate the differences of pathological, radiological, and prognostic features between cellular schwannoma (CS) and non-cellular schwannoma (NCS). METHODS CT and MRI images of 24 patients with CSs and 30 patients with NCSs were reviewed retrospectively. Clinico-pathological characteristics of CSs and NCSs and tumor radiological features including location, shape, size, border, cystic-solid components, hemorrhage, calcification, bone remodeling, pattern of CT/MRI precontrast scan, degree of enhancement, target sign, and tumor vessels were recorded. Statistical analyses were performed with Chi square or Fisher's exact test, independent sample t test, and logistic regression analysis to compare the differences between CSs and NCSs. RESULTS Four CSs showed mitotic activity, which was not found in the NCS group (P = 0.034). The CS group showed higher MIB-1 index than that in the NCS group (P = 0.002). Two patients with CS presented with tumor recurrence. Compared to NCSs, CSs were often located in spinal area (P = 0.028) and irregular (P = 0.013) with larger size (P = 0.005). Target sign, a common finding in NCSs (7/22, 31.8 %), was not seen in CSs (P = 0.014). The tumor vessels were only seen in CS group (4/22, 18.2 %; P = 0.027). Regression analysis revealed that location (P = 0.048) and size (P = 0.012) were independent indicators in differentiating CSs from NCSs. CONCLUSIONS CS is a rare subtype of schwannoma with some significant radiological features including a predilection for the spinal area, irregular shape, large tumor size, absent target sign, tumor vessels, and potential risk of recurrence. Location and size of the schwannomas were the most useful indicators in differentiating CSs from NCSs.
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Affiliation(s)
- Jingqi Zhu
- Department of Radiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhangwei Yang
- Department of Radiology, East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Rui Tang
- Department of Radiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Guangyu Tang
- Department of Radiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
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Sun Y, Xu J, Jia X. The Diagnosis, Treatment, Prognosis and Molecular Pathology of Borderline Ovarian Tumors: Current Status and Perspectives. Cancer Manag Res 2020; 12:3651-3659. [PMID: 32547202 PMCID: PMC7246309 DOI: 10.2147/cmar.s250394] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 04/24/2020] [Indexed: 11/24/2022] Open
Abstract
Borderline ovarian tumors (BOTs) are a type of low malignant potential tumor that is typically associated with better outcomes than ovarian cancer. Indeed, its 10-year survival rate is as high as 95%. However, there is a small subset of patients who experience relapse and eventually die. It has been shown that the prognosis of BOTs was based on pathological diagnosis, the age at diagnosis, pre-operative carbohydrate antigen 125 level, invasive implants, and micropapillary patterns. Now the molecular-targeted therapy and molecular-genetic diagnosis have developed into a form of precision medicine. Recent studies on extensive molecular characterizations and molecular pathological mechanisms of BOTs have helped us understand the genomic landscapes of BOTs, and therefore BOTs could be reclassified into biologically and clinically more accurate and effective subtypes. The purpose of this review is to summarize current status for the diagnosis and treatment of BOTs and to describe the research progress on molecular pathologies, with a goal of providing a theoretical perspective for the diagnosis and treatment of BOTs.
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Affiliation(s)
- Yu Sun
- Department of Gynecology, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing 210004, People's Republic of China
| | - Juan Xu
- Department of Gynecology, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing 210004, People's Republic of China
| | - Xuemei Jia
- Department of Gynecology, Women's Hospital of Nanjing Medical University (Nanjing Maternity and Child Health Care Hospital), Nanjing 210004, People's Republic of China
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