Towards the Clinical Implementation of Extracellular Vesicle-Based Biomarker Assays for Cancer.

BACKGROUND: Substantial research has been devoted to elucidating the role of extracellular vesicles (EVs) in the different hallmarks of cancer. Consequently, EVs are increasingly explored as a source of cancer biomarkers in body fluids. However, the heterogeneity in EVs, the complexity of body fluids, and the diversity in methods available for EV analysis, challenge the development and translation of EV-based biomarker assays. CONTENT: Essential steps in EV-associated biomarker development are emphasized covering biobanking, biomarker discovery, verification and validation, and clinical implementation. A meticulous study design is essential and ideally results from close interactions between clinicians and EV researchers. A plethora of different EV preparation protocols exists which warrants quality control and transparency to ensure reproducibility and thus enable verification of EV-associated biomarker candidates identified in the discovery phase in subsequent independent cohorts. The development of an EV-associated biomarker assay requires thorough analytical and clinical validation. Finally, regulatory affairs must be considered for clinical implementation of EV-based biomarker assays. SUMMARY: In this review, the current challenges that prevent us from exploiting the full potential of EV-based biomarker assays are identified. Guidelines and tools to overcome these hurdles are highlighted and are crucial to advance EV-based biomarker assays into clinical use.

Quality of Life After Extended Pelvic Surgery with Neurovascular or Bony Resections in Gynecological Oncology: A Systematic Review.

BACKGROUND: Extended pelvic surgery with neurovascular or bony resections in gynecological oncology has significant impact on quality of life (QoL) and high morbidity. The objective of this systematic review was to provide an overview of QoL, morbidity and mortality following these procedures. METHODS: The registered PROSPERO protocol included database-specific search strategies. Studies from 1966 onwards reporting on QoL after extended pelvic surgery with neurovascular or bony resections for gynecological cancer were considered eligible. All others were excluded. Study selection (Rayyan), data extraction, rating of evidence (GRADE) and risk of bias (ROBINS-I) were performed independently by two reviewers. RESULTS: Of 349 identified records, 121 patients from 11 studies were included-one prospective study, seven retrospective studies, and three case reports. All studies were of very low quality and with an overall serious risk of bias. Primary tumor location was the cervix (n = 78, 48.9%), vulva (n = 30, 18.4%), uterus (n = 21, 12.9%), endometrium (n = 15, 9.2%), ovary (n = 8, 4.9%), (neo)vagina (n = 3, 1.8%), Gartner duct/paracolpium (n = 1, 0.6%), or synchronous tumors (n = 3, 1.8%), or were not reported (n = 4, 2.5%). Bony resections included the pelvic bone (n = 36), sacrum (n = 2), and transverse process of L5 (n = 1). Margins were negative in 70 patients and positive in 13 patients. Thirty-day mortality was 1.7% (2/121). Three studies used validated QoL questionnaires and seven used non-validated measurements; all reported acceptable QoL postoperatively. CONCLUSIONS: In this highly selected patient group, mortality and QoL seem to be acceptable, with a high morbidity rate. This comprehensive study will help to inform eligible patients about the outcomes of extended pelvic surgery with neurovascular or bony resections. Future collaborative studies can enable the collection of QoL data in a validated, uniform manner.

TRPS1 Is Consistently Expressed in Hidradenoma Papilliferum.

TRPS1 is a novel immunohistochemical marker, so far quite specific and sensitive for breast cancer and especially useful for the diagnosis of triple-negative breast cancer. TRPS1 expression has recently been reported in normal skin appendages, as well as in a variety of benign and malignant cutaneous tumors, including adnexal tumors. However, it has not yet been reported in hidradenoma papilliferum (papillary hidradenoma), a benign adnexal neoplasm, accepted to originate from mammary-like glands in the vulvar or anogenital region of middle-aged women. We report consistent nuclear expression of TRPS1 in the epithelium of 9/9 cases of hidradenoma papilliferum, while in 2/2 cases with foci of oxyphilic metaplasia, these foci were consistently negative for TRPS1 immunohistochemistry. Our findings are in line with the theory that hidradenoma papilliferum is derived from mammary-like glands and showed that TRPS1 can be an additional sensitive immunohistochemical marker for hidradenoma papilliferum.

Sexual health in Belgian cervical cancer survivors: an exploratory qualitative study.

PURPOSE: To assess experiences of sexuality and of receiving sexual healthcare in cervical cancer (CC) survivors. METHODS: A qualitative phenomenological study using semistructured one-on-one interviews was conducted with 15 Belgian CC survivors recruited in 5 hospitals from August 2021 to February 2022. The interviews were audiotaped and transcribed verbatim. Data were analyzed using inductive thematic analysis. COREQ and SRQR reporting guidelines were applied. RESULTS: Most participants experienced an altered sexuality after CC treatment with often long-term loss/lack of sex drive, little/no spontaneity, limitation of positions to avoid dyspareunia, less intense orgasms, or no sexual activity at all. In some cases, emotional intimacy became more prominent. Physical (vaginal bleeding, vaginal dryness, dyspareunia, menopausal symptoms) and psychological consequences (guilt, changed self-image) were at the root of the altered sexuality. Treatment-induced menopause reduced sex drive. In premenopausal patients, treatment and/or treatment-induced menopause resulted in the sudden elimination of family planning. Most participants highlighted the need to discuss their altered sexual experience with their partner to grow together toward a new interpretation of sexuality. To facilitate this discussion, most of the participants emphasized the need for greater partner involvement by healthcare providers (HPs). The oncology nurse or sexologist was the preferred HP with whom to discuss sexual health. The preferred timing for information about the sexual consequences of treatment was at treatment completion or during early follow-up. CONCLUSION: Both treatment-induced physical and psychological experiences were prominent and altered sexuality. Overall, there was a need for HPs to adopt proactive patient-tailored approaches to discuss sexual health.

Vaginal morbidity, sexual functioning, and health-related quality of life in cervical cancer survivors: a cross-sectional multicenter study (VAMOS).

PURPOSE: To compare sexual/vaginal functioning between early cervical cancer (ECC) and locally advanced cervical cancer (LACC) survivors. METHODS: VAMOS was a multicenter, cross-sectional, questionnaire, noninferiority study including ECC patients treated with surgery and, if clinically indicated, adjuvant (chemo)radiotherapy and LACC patients treated with neoadjuvant (chemo)radiotherapy followed by surgery. Patient-reported outcomes (PROs) were assessed using the EORTC QLQ-C30, EORTC QLQ-CX24, and Female Sexual Functioning Index (FSFI) questionnaires. Clinical reported outcomes (ClinROs) consisted of vaginal morbidity scored according to the CTCAE v4.0 scoring system. RESULTS: One hundred forty-three patients were included. Compared to ECC patients (n = 97), LACC patients (n = 46) were significantly less sexually active in the 4 weeks prior to completion of the questionnaires (65% vs. 41%; p = .005). The primary endpoint was not met: LACC patients reported a higher mean score (more problems) for sexual/vaginal functioning than ECC patients, with a non-clinically relevant mean difference of 6.38 ([95% CI: - 6.41, 19.17]; p = .570 for noninferiority). Regarding the secondary endpoints, the prevalence of sexual dysfunction between the two groups did not differ significantly (p = 0.124). Compared to ECC patients, LACC patients did not have significantly more vaginal morbidity (adjusted odds ratio [OR] 1.51 [95% CI: 0.22, 10.29]; p = .674). Moreover, there was poor agreement between any vaginal morbidity and sexual dysfunction (Cohen's kappa of 0.17). CONCLUSION: Compared to ECC survivors, LACC survivors were significantly less sexually active and reported equivalent or worse sexual/vaginal functioning, although the proportion of patients with sexual dysfunction was similar. Clinical assessment of vaginal morbidity was poorly correlated with sexual dysfunction.

Integrating automated liquid handling in the separation workflow of extracellular vesicles enhances specificity and reproducibility.

BACKGROUND: Extracellular vesicles (EV) are extensively studied in human body fluids as potential biomarkers for numerous diseases. Major impediments of EV-based biomarker discovery include the specificity and reproducibility of EV sample preparation as well as intensive manual labor. We present an automated liquid handling workstation for the density-based separation of EV from human body fluids and compare its performance to manual handling by (in)experienced researchers. RESULTS: Automated versus manual density-based separation of trackable recombinant extracellular vesicles (rEV) spiked in PBS significantly reduces variability in rEV recovery as quantified by fluorescent nanoparticle tracking analysis and ELISA. To validate automated density-based EV separation from complex body fluids, including blood plasma and urine, we assess reproducibility, recovery, and specificity by mass spectrometry-based proteomics and transmission electron microscopy. Method reproducibility is the highest in the automated procedure independent of the matrix used. While retaining (in urine) or enhancing (in plasma) EV recovery compared to manual liquid handling, automation significantly reduces the presence of body fluid specific abundant proteins in EV preparations, including apolipoproteins in plasma and Tamm-Horsfall protein in urine. CONCLUSIONS: In conclusion, automated liquid handling ensures cost-effective EV separation from human body fluids with high reproducibility, specificity, and reduced hands-on time with the potential to enable larger-scale biomarker studies.

Completion surgery after intensity-modulated arc therapy for locally advanced cervical cancer: long-term follow-up and update on surgical outcome and oncologic results of a unique tertiary care single-center retrospective cohort.

BACKGROUND: Chemoradiotherapy (CRT) followed by brachytherapy (BT) is the standard treatment for locally advanced cervical cancer (LACC), but replacement of BT by surgery (CRT-S) could be an acceptable alternative. The main concern is the risk of operative morbidity. The aim is to report on therapeutic morbidity, OS, PC, and LC of CRT-S. METHODS: This was a single tertiary center retrospective cohort study in patients treated with CRT-S. A type II Wertheim hysterectomy was performed 6-8 weeks after CRT. Acute and chronic radiotherapy-related and surgical morbidity was classified according to the CTCAE v4.0. OS, and DFS, PC, and LC were calculated using the Kaplan-Meier method. Univariate and multivariate Cox proportional hazard models were performed to determine variables with a prognostic role. RESULTS: A total of 130 consecutive LACC patients were treated with CRT, and 119 underwent completion surgery. The median follow-up was 53 months. Five-year OS rate, local control, pelvic control, and 5-year DFS rate were 73%, 93%, 90%, and 74%, respectively. The 5-year OS rate was 92%/72%/67%/56% for FIGO (2009) stage I/II/III/IV, respectively. The five-year OS rate was 79% and 71% for adenocarcinoma and squamous cell carcinoma (p > 0.05), respectively. There was no intra- and perioperative mortality. Intraoperative and early postoperative complication rates were 7% and 20% (3% ≥ G3), respectively; they resolved within 3 months. The late postoperative complication rate was 9% (7% ≥ G3). Acute/late radiotherapy-related G3 side effects were 5%/3% for gastrointestinal and 3%/7% for genitourinary side effects. CONCLUSIONS: CRT-S is safe with an acceptable rate of complications for both the CRT and completion surgery and shows encouraging outcome data for stage III/IV and adenocarcinoma patients.

Immunologic impact of chemoradiation in cervical cancer and how immune cell infiltration could lead toward personalized treatment.

We investigated the potential of tumor-infiltrating immune cells (ICs) as predictive or prognostic biomarkers for cervical cancer patients. In total, 38 patients treated with (chemo)radiotherapy and subsequent surgery were included in the current study. This unique treatment schedule makes it possible to analyze IC markers in pretreatment and posttreatment tissue specimens and their changes during treatment. IC markers for T cells (CD3, CD4, CD8 and FoxP3), macrophages (CD68 and CD163) and B cells (CD20), as well as IL33 and PD-L1, were retrospectively analyzed via immunohistochemistry. Patients were grouped in the low score or high score group based on the amount of positive cells on immunohistochemistry. Correlations to pathological complete response (pCR), cause-specific survival (CSS) and metastasis development during follow-up were evaluated. In analysis of pretreatment biopsies, significantly more pCR was seen for patients with CD8 = CD3, CD8 ≥ CD4, positive IL33 tumor cell (TC) scores, IL33 IC < TC and PD-L1 TC ≥5%. Besides patients with high CD8 scores, also patients with CD8 ≥ CD4, CD163 ≥ CD68 or PD-L1 IC ≥5% had better CSS. In the analysis of posttreatment specimens, less pCR was observed for patients with high CD8 or CD163 scores. Patients with decreasing CD8 or CD163 scores between pretreatment and posttreatment samples showed more pCR, whereas those with increasing CD8 or decreasing IL33 IC scores showed a worse CSS. Meanwhile, patients with an increasing CD3 score or stable/increasing PD-L1 IC score showed more metastasis during follow-up. In this way, the intratumoral IC landscape is a promising tool for prediction of outcome and response to (chemo)radiotherapy.

Splenic 18F-FDG uptake on baseline PET/CT is associated with oncological outcomes and tumor immune state in uterine cervical cancer.

OBJECTIVE: The spleen represents an important contributor to tumor immune escape, but the relevance of increased splenic metabolic activity remains to be fully elucidated. METHODS: We retrospectively measured the spleen-to-liver standard uptake value (SLR) on 18F-FDG PET/CT examinations of 92 consecutive patients with FIGO stage IB1 to IVA cervical cancer and integrated the results with survival, response to treatment, tumor immune infiltrate, and baseline characteristics. RESULTS: SLRmax > 0.92 (p = .026) and SLRmean > 0.94 (p = .005) were significantly associated with decreased DFS in univariable analysis. Multivariable models were built using best subset selection; ΔSLRmax and either SLRmax or SLRmean were consistently selected, strongly reinforcing the association between SLR variables and DFS in relation to potential confounders (all models p ≤ .002). Independent associations were found for SLRmax using multivariable Cox regression models for DFS (all p ≤ .003). Further, uni- and multivariable analyses demonstrated the negative impact of higher SLR values on pathological complete response. A statistically significant higher proportion of patients with high SLRmax had a dense infiltrate of CD20+ (p = .036) and CD68+ (p = .015) immune cells, as well as PD-L1+ tumor cells (p = .019) as compared to those with low SLRmax. Finally, high SLRmax status was neither associated with systemic inflammatory markers (except for an increased white blood cell count; p = .038), nor with clinically overt infection. CONCLUSION: This hypothesis-generating study provides the first evidence that increased splenic metabolic activity is a negative prognostic and predictive biomarker in locally advanced cervical cancer. In addition, it might help to discriminate immunologically 'hot' from 'cold' cervical tumors.

Neo-adjuvant treatment of adenocarcinoma and squamous cell carcinoma of the cervix results in significantly different pathological complete response rates.

BACKGROUND: Previous studies on cervical cancer reported a worse outcome for adenocarcinoma (AC) compared with squamous cell carcinoma (SCC). Nevertheless, standard treatment remains identical. Insight in the impact of histological types on biological behavior and pathological complete response rates might result in a treatment paradigm shift. METHODS: Clinicopathological characteristics, survival rates and relapse patterns were compared between AC (n = 36) and SCC (n = 143) cervical cancer patients. Pathological response to treatment was evaluated in the patient subgroup treated with neo-adjuvant chemoradiation followed by surgery (NA-CRT group; n = 84). RESULTS: In the entire cohort, 5y Disease Specific Survival (DSS) was 97.1 and 84% for AC and SCC respectively (p = 0.150). In the NA-CRT group 5y DSS was 100 and 75.5% for AC and SCC respectively (p = 0.059). Relapse patterns did not differ significantly between AC and SCC in the entire cohort, or in the NA-CRT group. Adenocarcinoma patients treated with NA-CRT showed significantly less pathological complete response compared with SCC patients (AC = 7%, SCC = 43%, p = 0.027). CONCLUSIONS: There were no statistically significant differences regarding relapse and DSS rates between SCC and AC in the entire cohort, or the NA-CRT group. However, a trend to better 5y DSS of AC in the NA-CRT group was observed. This analysis showed significant differences in treatment responses after NA-CRT: patients with AC responded remarkably less to chemoradiation, resulting in a significantly lower pathological complete response rate. These findings imply a need for a paradigm shift in the treatment of cervical AC patients.

EXclusion of non-Involved uterus from the Target Volume (EXIT-trial): an individualized treatment for locally advanced cervical cancer using modern radiotherapy and imaging techniques.

BACKGROUND: Definitive chemoradiotherapy is standard of care in locally advanced cervical cancer (LACC). Both toxicity and local relapse remain major concerns in this treatment. We hypothesize that a magnetic resonance imaging (MRI) based redefining of the radiotherapeutic target volume will lead to a reduction of acute and late toxicity. In our center, chemoradiotherapy followed by hysterectomy was implemented successfully in the past. This enables us to assess the safety of reducing the target volume but also to explore the biological effects of chemoradiation on the resected hysterectomy specimen. METHODS: The EXIT-trial is a phase II, single arm study aimed at LACC patients. This study evaluates whether a MRI-based exclusion of the non-tumor-bearing parts of the uterus out of the target volume results in absence of tumor in the non-high doses irradiated part of the uterus in the hysterectomy specimen. Secondary endpoints include a dosimetric comparison of dose on normal tissue when comparing study treatment plans compared to treatment of the whole uterus at high doses; acute and chronic toxicity, overall survival, local relapse- and progression-free survival. In the translational part of the study, we will evaluate the hypothesis that the baseline apparent diffusion coefficient (ADC) values of diffusion weighted MRI and its evolution 2 weeks after start of CRT, for the whole tumor as well as for intra-tumoral regions, is prognostic for residual tumor on the hysterectomy specimen. DISCUSSION: Although MRI is already used to guide target delineation in brachytherapy, the EXIT-trial is the first to use this information to guide target delineation in external beam radiotherapy. Early therapy resistance prediction using DW-MRI opens a window for early treatment adaptation or further dose-escalation on tumors/intratumoral regions at risk for treatment failure. TRIAL REGISTRATION: Belgian Registration: B670201526181 (prospectively registered, 26/11/2015); ClinicalTrials.gov Identifier: NCT03542942 (retrospectively registered, 17/5/2018).

Advanced Ovarian Cancer: Primary or Interval Debulking? Five Categories of Patients in View of the Results of Randomized Trials and Tumor Biology: Primary Debulking Surgery and Interval Debulking Surgery for Advanced Ovarian Cancer.

BACKGROUND: Standard treatment of stage III and IV advanced ovarian cancer (AOC) consists of primary debulking surgery (PDS) followed by chemotherapy. Since the publication of the European Organisation for Research and Treatment of Cancer/National Cancer Institute of Canada trial, clinical practice has changed and many AOC patients are now treated with neoadjuvant chemotherapy (NACT) followed by interval debulking surgery (IDS). The best option remains unclear. Ovarian cancer is a heterogenic disease. Should we use the diversity in biology of the tumor and patterns of tumor localization to better stratify patients between both approaches? METHODS: This analysis was based on results of five phase III randomized controlled trials on PDS and IDS in AOC patients, three Cochrane reviews, and four meta-analyses. RESULTS: There is still no evidence that NACT-IDS is superior to PDS. Clinical status, tumor biology, and chemosensitivity should be taken into account to individualize surgical approach. Nonserous (type 1) tumors with favorable prognosis are less chemosensitive, and omitting optimal PDS will lead to less favorable outcome. For patients with advanced serous ovarian cancer (type 2) associated with severe comorbidity or low performance status, NACT-IDS is the preferred option. CONCLUSION: We propose stratifying AOC patients into five categories according to patterns of tumor spread (reflecting the biologic behavior), response to chemotherapy, and prognosis to make a more rational decision between PDS and NACT-IDS. IMPLICATIONS FOR PRACTICE: Trial results regarding effect and timing of debulking surgery on survival of patients with advanced ovarian cancer have been inconsistent and hence difficult to interpret. This review examines all randomized trials on primary and interval debulking surgery in advanced ovarian cancer, including the results of the newly published CHORUS (chemotherapy or upfront surgery for newly diagnosed advanced ovarian cancer) trial. On the basis of findings presented in this review and in view of recent molecular data on the heterogeneity of ovarian tumors, we propose prognostic categorization for patients with advanced ovarian cancer to better distinguish those who would optimally benefit from primary debulking from those who would better benefit from interval debulking following neoadjuvant chemotherapy.

Baseline assessment of cervical cancer screening and treatment capacity in 25 counties in Kenya, 2022.

Background: Cervical cancer is the leading cause of cancer deaths among women in Kenya. In the context of the Global strategy to accelerate the elimination of cervical cancer as a public health problem, Kenya is currently implementing screening and treatment scale-up. For effectively tracking the scale-up, a baseline assessment of cervical cancer screening and treatment service availability and readiness was conducted in 25 priority counties. We describe the findings of this assessment in the context of elimination efforts in Kenya. Methods: The survey was conducted from February 2021 to January 2022. All public hospitals in the target counties were included. We utilized healthcare workers trained in preparation for the scale-up as data collectors in each sub-county. Two electronic survey questionnaires (screening and treatment; and laboratory components) were used for data collection. All the health system building blocks were assessed. We used descriptive statistics to summarize the main service readiness indicators. Results: Of 3,150 hospitals surveyed, 47.6% (1,499) offered cervical cancer screening only, while 5.3% (166) offered both screening and treatment for precancer lesions. Visual inspection with acetic acid (VIA) was used in 96.0% (1,599/1,665) of the hospitals as primary screening modality and HPV testing was available in 31 (1.0%) hospitals. Among the 166 hospitals offering treatment for precancerous lesions, 79.5% (132/166) used cryotherapy, 18.7% (31/166) performed thermal ablation and 25.3% (42/166) performed large loop excision of the transformation zone (LLETZ). Pathology services were offered in only 7.1% (17/238) of the hospitals expected to have the service (level 4 and above). Only 10.8% (2,955/27,363) of healthcare workers were trained in cervical cancer screening and treatment; of these, 71.0% (2,097/2,955) were offering the services. Less than half of the hospitals had cervical cancer screening and treatment commodities at time of survey. The main health system strength was presence of multiple screening points at hospitals, but frequent commodity stock-outs was a key weakness. Conclusion: Training, commodities, and diagnostic services are major gaps in the cervical cancer program in Kenya. To meet the 2030 elimination targets, the national and county governments should ensure adequate financing, training, and service integration, especially at primary care level.

Exclusion of non-Involved uterus from the target volume (EXIT-trial): An individualized treatment for locally advanced cervical cancer using modern radiotherapy and imaging techniques followed by completion surgery.

Background and purpose: Chemoradiotherapy followed by brachytherapy is the standard of care for locally advanced cervical cancer (LACC). In this study, we postulate that omitting an iconographical unaffected uterus (+12 mm distance from the tumour) from the treatment volume is safe and that no tumour will be found in the non-targeted uterus (NTU) leading to reduction of high-dose volumes of surrounding organs at risk (OARs). Material and Methods: In this single-arm phase 2 study, two sets of target volumes were delineated: one standard-volume (whole uterus) and an EXIT-volume (exclusion of non-tumour-bearing parts of the uterus with a minimum 12 mm margin from the tumour). All patients underwent chemoradiotherapy targeting the EXIT-volume, followed by completion hysterectomy. In 15 patients, a plan comparison between two treatment plans (PTV vs PTV_EXIT) was performed. The primary endpoint was the pathological absence of tumour involvement in the non-targeted uterus (NTU). Secondary endpoints included dosimetric impact of target volume reduction on OARs, acute and chronic toxicity, overall survival (OS), locoregional recurrence-free survival (LRFS), and progression-free survival (PFS). Results: In all 21 (FIGO stage I: 2; II: 14;III: 3; IV: 2) patients the NTU was pathologically negative. Ssignificant reductions in Dmean in bladder, sigmoid and rectum; V15Gy in sigmoid and rectum, V30Gy in bladder, sigmoid and rectum; V40Gy and V45Gy in bladder, bowel bag, sigmoid and rectum; V50Gy in rectum were achieved. Median follow-up was 54 months (range 7-79 months). Acute toxicity was mainly grade 2 and 5 % grade 3 urinary. The 3y- OS, PFS and LRFS were respectively 76,2%, 64,9% and 81 %. Conclusion: MRI-based exclusion of the non-tumour-bearing parts of the uterus at a minimum distance of 12 mm from the tumour out of the target volume in LACC can be done without risk of residual disease in the NTU, leading to a significant reduction of the volume of surrounding OARS treated to high doses.

Performance of MRI for Detection of ≥pT1b Disease in Local Staging of Endometrial Cancer.

Magnetic resonance imaging (MRI) can be used for the preoperative local staging of endometrial cancer (EC). The presence of ≥pT1b disease (i.e., tumor invasion in ≥50% of the myometrium, into the cervical stroma or spread outside the uterus) has important prognostic value and implications for the decision to perform lymphadenectomy. The purpose of this study was to assess the performance of MRI for the detection of ≥pT1b disease and to evaluate whether tumor size measured via MRI was predictive for ≥pT1b disease, independent of imaging signs of deep invasion. MRI T-staging and tumor diameter and volume were correlated with histopathology of the hysterectomy specimen in 126 patients. MRI had a sensitivity, specificity, positive predictive value, negative predictive value and accuracy of 70.0%, 83.3%, 79.2%, 75.3% and 77.0%, respectively, for the detection of ≥pT1b disease. A tumor diameter of ≥40 mm and volume of ≥20 mL measured via MRI were predictive for ≥pT1b disease at rates of 78.3% and 87.1%, respectively. An EC size of at least 5 mm upon MRI was predictive for ≥pT1b disease in more than 50% of cases. Our results support the use of MRI in the preoperative staging of EC and suggest including size criteria in EC staging guidelines.

Identification of potentially actionable genetic variants in epithelial ovarian cancer: a retrospective cohort study.

Ovarian cancer is the most lethal gynecologic malignancy, mainly due to late-stage diagnosis, frequent recurrences, and eventually therapy resistance. To identify potentially actionable genetic variants, sequencing data of 351 Belgian ovarian cancer patients were retrospectively captured from electronic health records. The cohort included 286 (81%) patients with high-grade serous ovarian cancer, 17 (5%) with low-grade serous ovarian cancer, and 48 (14%) with other histotypes. Firstly, an overview of the prevalence and spectrum of the BRCA1/2 variants highlighted germline variants in 4% (11/250) and somatic variants in 11% (37/348) of patients. Secondly, application of a multi-gene panel in 168 tumors revealed a total of 214 variants in 28 genes beyond BRCA1/2 with a median of 1 (IQR, 1-2) genetic variant per patient. The ten most often altered genes were (in descending order): TP53, BRCA1, PIK3CA, BRCA2, KRAS, ERBB2 (HER2), TERT promotor, RB1, PIK3R1 and PTEN. Of note, the genetic landscape vastly differed between the studied histotypes. Finally, using ESCAT the clinical evidence of utility for every genetic variant was scored. Only BRCA1/2 pathogenic variants were classified as tier-I. Nearly all patients (151/168; 90%) had an ESCAT tier-II variant, most frequently in TP53 (74%), PIK3CA (9%) and KRAS (7%). In conclusion, our findings imply that although only a small proportion of genetic variants currently have direct impact on ovarian cancer treatment decisions, other variants could help to identify novel (personalized) treatment options to address the poor prognosis of ovarian cancer, particularly in rare histotypes.

Interobserver variability of the International Federation of Gynecology and Obstetrics staging in cervical cancer.

OBJECTIVE: The objective of this study was to assess the interobserver variability of pelvic examination under anesthesia (EUA) in cervical cancer. METHODS: Subsequent patients undergoing a staging procedure under anesthesia for primary cervical cancer were enrolled in the study. All clinicians assessed "blinded" tumor size, and the involvement of vagina, parametria, sacrouterine ligaments, pelvic sidewalls, bladder, and/or rectum. Items were scored varying from 1 ("certainly no involvement"), 2 ("not sure about involvement"), to 3 ("involvement"). Each individual decided on the International Federation of Gynecology and Obstetrics (FIGO) stage; also, the urge for imaging and treatment proposal were accounted for. Final FIGO staging was obtained by consensus of the team. Investigators were classified as experienced after more than 50 EUAs. All others were classified less experienced. The free-marginal κ values between experienced and less experienced investigators were calculated for all previously mentioned items. RESULTS: Between February 2009 and December 2010, a total of 86 patients were enrolled. Among experienced investigators, a moderate interobserver agreement was found with regard to FIGO stage (free-marginal κ value of 0.49) and an excellent interobserver agreement on their proposed therapy (free-marginal κ value of 0.84). A lower level of agreement was found when comparing experienced with less experienced investigators: only a slight level of agreement on FIGO stage and a substantial agreement on their therapy proposal (free-marginal κ values of 0.03 and 0.66). CONCLUSIONS: We describe only a moderate interobserver agreement on clinical staging of patients with cervical cancer. The interobserver agreement increases in the group of experienced doctors, indicating that EUA can be learned.

Completion surgery after intensity-modulated arc therapy in the treatment of locally advanced cervical cancer: feasibility, surgical outcome, and oncologic results.

INTRODUCTION: Since the addition of chemotherapy to radiotherapy, the survival rates of locally advanced cervical cancer (LACC) have improved but are still disappointing. Therefore, the idea of surgery after chemoradiation in case of LACC or bulky disease was adopted. One of the concerns regarding surgery following chemoradiotherapy is surgery-related morbidity. AIM: The objectives of this study were to investigate the feasibility of surgery after advanced radiotherapy techniques such as intensity-modulated arc therapy (IMAT) and to describe the morbidity. METHODS: This was a prospective study of primary inoperable LACC patients primary treated with IMAT, in most cases combined with weekly cisplatin. Then the resectability was reevaluated. If resectable patients were treated with Wertheim type 2 surgery ± pelvic lymphadenectomy (on positron emission tomography-computed tomography indication). If tumor is not resectable, patients were treated with brachytherapy. RESULTS: Since 2006, 41 consecutive patients were included. After neoadjuvant IMAT, 34 were considered resectable and underwent surgery, whereas 7 proceeded with brachytherapy. The operative mortality rate was nil. There were no major perioperative complications. No ureter, bladder, or bowel injuries occurred. No postoperative urinary/digestive fistulae or stenoses were noted. Eleven patients had postoperatively urinary retention problems. At the time of discharge, 5 patients still needed self-catheterization. All problems resolved within 3 months. In 4 cases, we saw significant lymphoceles. In all patients intended to treat, overall survival and disease-free survival at 3 years were 63% and 74%. In the Wertheim group, overall survival and disease-free survival at 3 years were 81% and 91%. CONCLUSIONS: Completing surgery after chemoradiation therapy (with IMAT) for LACC or bulky disease is feasible, and complication rates are comparable with those of primary surgery for cervical cancer.