Real world data of niraparib in platinum sensitive relapsed ovarian cancer: A multicenter experience of the MITO group

OBJECTIVE

PARP (poly adenosine diphosphate [ADP]-ribose polymerase) inhibitors are approved as maintenance therapy in platinum sensitive ovarian cancer (OC), in first line and in the recurrent setting, regardless of BRCA mutational status. Real-world data after the introduction of these agents are needed to evaluate whether the benefit observed in phase III randomized clinical trials can be translated into clinical practice. The aim of our study was to provide real-life data on efficacy and safety of niraparib administered as maintenance in platinum sensitive relapsed OC patients (PSROC).

METHODS

This retrospective/prospective observational study included relapsed OC patients that received niraparib as maintenance, at the time of platinum sensitive recurrence within the Italian expanded-access program. Clinical data at the time of diagnosis and at the time of recurrence were collected and analyzed. Median progression free survival (PFS) and overall survival (OS) were calculated as the time from start of niraparib treatment to subsequent radiologically confirmed relapse and death or last contact, respectively.

RESULTS

Among 304 eligible patients, 260 (85%) had BRCA wild-type tumor and 36. (11.9%) were BRCA mutated. Median PFS was 9.1 months (95% CI: 6.9-11.2) and 10.3 months (95% CI: 7.0-13.5) in the BRCAwt and BRCAmut cohorts, respectively. Furthermore, median OS was 41.7 months (95% CI: 31.6-41.9) and 34.6 months (95% CI: N.E.) in the BRCAwt and BRCAmut cohorts, respectively.

CONCLUSION

Data from this large real-life dataset suggested that maintenance with niraparib in the real-life setting of platinum sensitive OC recurrence is effective and well tolerated.

Management of oligometastatic ovarian cancer recurrence during PARP inhibitor maintenance

OBJECTIVE

The benefit of surgery and maintenance treatment with PARP inhibitors (PARPi) has been clearly demonstrated in ovarian cancer. Also, the efficacy and safety of stereotactic body radiotherapy has been shown in patients with metastatic, persistent, and recurrent disease. The aim of this study is to evaluate the management of oligometastatic progression during PARPi maintenance treatment.

METHODS

This is an observational, retrospective, single-arm study conducted from June 2017 to December 2020 in patients with recurrent ovarian cancer with oligometastatic progression under PARPi maintenance treatment and receiving surgery or stereotactic body radiotherapy for such recurrence. PARPi treatment was continued until further progression of the disease. The primary objective of the study was the median prolongation of the treatment-free interval-p (without platinum) after local treatment.

RESULTS

A total of 186 patients with ovarian cancer were treated with PARPi at recurrence. Of these, 30 (16%) developed oligometastatic progression. The median age was 49.5 years (range 35-73). Olaparib, niraparib and rucaparib were administered to 33%, 60%, and 7% of patients, respectively. The median prolongation of the treatment-free interval-p of patients treated with surgery or stereotactic body radiotherapy was 6 and 10 months, respectively (p=0.53). The median treatment-free interval-p of patients treated with surgery or stereotactic body radiotherapy at the time of oligometastatic progression was 32 and 29 months, respectively (p=0.44). At the time of this publication, 50% of patients are still on treatment with PARPi following progression.

CONCLUSIONS

Patients with recurrent ovarian cancer who have oligometastic progression during PARPi maintenance may continue to benefit from PARPi if combined with local treatment.

Optimizing the number of cycles of neoadjuvant chemotherapy in advanced epithelial ovarian carcinoma: A propensity-score matching analysis

OBJECTIVE

Neoadjuvant chemotherapy and interval debulking surgery are now widely offered in ovarian cancer patients unsuitable for surgery; the number of preoperative NACT cycles to be given is still an issue. Our aim was to compare survival outcomes of patients with advanced ovarian cancer treated with ≤4 or more NACT cycles.

METHODS

A cohort of AEOC patients with stage III-IV epithelial OC who underwent NACT followed by IDS was identified. Patients were classified in group A (≤4 cycles) and group B (>4 cycles). Selection bias from the heterogeneity of demographic and clinical characteristics was avoided using propensity score matching (2:1 ratio).

RESULTS

140 (group A) and 70 (group B) patients were included. After the propensity score matching, there were no imbalances in baseline characteristics. BRCA status was associated to improved OS (HR = 0.41; 95%CI 0.18.0.92, p = 0.032) and residual tumor to decreased OS (HR = 1.93; 95%CI 1.08-3.46, p = 0.026). Statistically significant differences were not observed in OS (2-year OS 82.4% for group A versus 77.1% for group B, p = 0.109) and PFS (2-year PFS 29.7% for group A versus 20.0% for group A, p = 0.875). In group B, the administration of >4 cycles was related to an additional chance of achieving complete (12.9%) and partial (34.3%) responses compared to responses after 3-4 cycles.

CONCLUSIONS

Receiving more than 4 cycles of NACT is no detrimental in terms of OS and PFS in advanced ovarian cancer. Response rates can increase following further cycles administration.

APPROACH

Medical treatment of patients with gynecologic cancer during the COVID-19 pandemic

BACKGROUND

During the COVID-19 pandemic, cancer care had to be reorganized; national and international recommendations were published to manage anticancer treatments safely and to reduce the risk of SARS-CoV-2 infection for patients and health workers.

OBJECTIVE

To evaluate whether the adoption of recommendations for the management of patients with gynaecologic cancer receiving treatment during the pandemic resulted in containment of infections and continuing oncologic care.

METHODS

Based on the published recommendations, and according to the local Health Direction guidelines, we developed and drafted a security protocol to modify access of patients with gynaecologic cancer to the "Fondazione Policlinico Agostino Gemelli-IRCCS, Rome" between February 1 and April 30, 2020 and compared results with the corresponding 3 months of 2019.

RESULTS

Between February and April 2019, we registered 3254 admissions, including 2253 patients receiving intravenous chemotherapies, 298 receiving oral therapies, and 703 having hospital visits. Between February and April 2020, we registered 3213 admissions, including 2221 patients receiving intravenous chemotherapies, 401 receiving oral therapies, and 591 having hospital visits. Oral treatments and general visits were different in the two time periods (p<0.001). Despite the elevated patient flow, only one patient (0.1%) tested positive for COVID-19 and there were no cases among healthcare staff.

CONCLUSIONS

Based on the adopted security protocol we provided continuity of care for all patients and limited the spread of the COVID-19 infection.

Secondary cytoreductive surgery in platinum-sensitive recurrent ovarian cancer before olaparib maintenance: Still getting any benefit? A case-control study

OBJECTIVE

The role of secondary cytoreductive surgery (SCS) in platinum-sensitive recurrent ovarian cancer (PSROC) is still controversial. We investigated the role of SCS in PSROC patients with BRCA1/2 mutation (BRCAmut) who received platinum-based chemotherapy followed by olaparib maintenance.

METHODS

This is a case-control study. Patients with first PSROC admitted to our Gynecologic Oncology Unit between 2014 and 2018 were identified. Main eligibility criteria: positive BRCA1/2 germline or somatic mutation status and olaparib maintenance at primary recurrence after response to platinum-based chemotherapy. Cases were those who received SCS followed by medical treatment (SCS-CT-OLA, group 1), controls were those who received medical treatment alone (CT-OLA, group 2).

RESULTS

Overall, 46 patients were identified; 23 (50%) BRCAmut women undergoing SCS followed by platinum-based chemotherapy and olaparib maintenance were matched with 23 (50%) BRCAmut women who only received medical treatment. Groups were well balanced: no statistical differences were found with regard of age, mutational status, treatment's approach at diagnosis, timing and patterns of disease presentation at recurrence. Median time to first subsequent therapy (TFST) was significantly longer in the SCS-CT-OLA than in the CT-OLA group (42 months vs 16 months; p = 0.05). Also, SCS-CT-OLA patients had the best post-recurrence survival (PRS), with a 3-year PRS of 79% in SCS-CT-OLA group versus 42% in CT-OLA group (p = 0.02).

CONCLUSIONS

SCS increases TFST and PRS in PSROC patients with BRCAmut candidate for olaparib maintenance after platinum-based chemotherapy. Prospective studies are needed. In the era of personalized medicine, indication to SCS should be individualized.

Multicenter, randomised, open-label, non-comparative phase 2 trial on the efficacy and safety of the combination of bevacizumab and trabectedin with or without carboplatin in women with partially platinum-sensitive recurrent ovarian cancer

Background

Trabectedin, in addition to its antiproliferative effect, can modify the tumour microenvironment and this could be synergistic with bevacizumab. The efficacy and safety of trabectedin and bevacizumab ± carboplatin have never been investigated.

Methods

In this phase 2 study, women progressing between 6 and 12 months since their last platinum-based therapy were randomised to Arm BT: bevacizumab, trabectedin every 21 days, or Arm BT+C: bevacizumab, trabectedin and carboplatin every 28 days, from cycles 1 to 6, then trabectedin and bevacizumab as in Arm BT. Primary endpoints were progression-free survival rate (PFS-6) and severe toxicity rate (ST-6) at 6 months, assuming a PFS-6 ≤35% for BT and ≤40% for BT+C as not of therapeutic interest and, for both arms, a ST-6  ≥ 30% as unacceptable.

Results

BT+C (21 patients) did not meet the safety criteria for the second stage (ST-6 45%; 95%CI: 23%–69%) but PFS-6 was 85% (95%CI: 62%–97%). BT (50 patients) had 75% PFS-6 (95%CI: 60%–87%) and 16% ST-6 (95%CI 7%–30%).

Conclusions

BT compared favourably with other platinum- and non-platinum-based regimens. The combination with carboplatin needs to be assessed further in a re-modulated safer schedule to confirm its apparent strong activity.

Clinical Trial Registration

NCT01735071 (Clinicaltrials.gov).

New medical approaches in advanced ovarian cancer

Ovarian cancer is the fifth leading cause of cancer death among women and the most lethal gynecologic malignancy. Most women with advanced epithelial ovarian cancer will experience many episodes of recurrent disease with progressively shorter disease-free intervals. For women whose disease continues to respond to platinum-based drugs, the disease can often be controlled for 5 years or more. Enormous progress has been made in the management of this disease, and new targeted treatments such as antiangiogenic drugs, poly(adenosine diphosphate-ribose) polymerase inhibitors, and immune checkpoint inhibitors offer potential for improved survival. A variety of combination strategies are being evaluated to leverage these agents. The objective of this review is to summarize results from clinical trials that tested cytotoxic drugs and target strategies for the treatment of ovarian cancer with particular attention to Phase III and ongoing trials.

Pathologic response to neoadjuvant chemotherapy in advanced ovarian cancer: utility of a scoring system to predict outcomes

Background

Growing evidence supports the role of neoadjuvant chemotherapy in patients with advanced epithelial ovarian cancer. Currently, there is no shared histopathologic scoring system to assess pathologic response in the specimens obtained at interval surgery after neoadjuvant chemotherapy This review aims to summarize the literature on pathologic response, focusing on proposed scoring systems.

Methods

The systematic review was conducted according to the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines, focusing on the definition of pathologic response, its prognostic value, possible predictors, and future implications. Eighteen manuscripts focusing on pathologic response in epithelial ovarian cancer were selected for analysis.

Results

Overall, eight histopathologic scoring systems to evaluate pathologic response have been proposed. There are currently no available markers (serum, radiological, genomic) to select which patients could achieve the highest benefit from neoadjuvant chemotherapy experiencing a complete pathologic response. A three-tier scoring system (CRS) based on omental assessment and which classifies the response to neoadjuvant chemotherapy has been validated in external cohorts of epithelial ovarian cancer. This scoring system demonstrated adequate interobserver reproducibility. Data is limited on the pathologic complete response rate changes according to chemotherapy regimen.

Conclusions

A histopathologic scoring system endowed with prognostic value could be helpful in personalizing the treatment decision in patients with epithelial ovarian cancer.

Early detection of recurrence or progression disease in patients with ovarian cancer after primary debulking surgery. Correlation between CT findings and CA 125 levels

BACKGROUND

There are no standard approaches for follow up in advanced ovarian cancer (AOC) patients; the aim of this study is to evaluate correlation between computed tomography (CT) and CA 125 levels to assess early detection of recurrence or progression disease (PD).

METHODS

We included 76 patients with AOC, who had prior debulking surgery, starting first or second line of chemotherapy and underwent follow-up CT examinations. Evaluation of tumor response to treatment by imaging was assessed using RECIST 1.1. Site of relapse was classified as: abdomen, chest and neck (observed in the upper chest scans).

RESULTS

Change in CA 125 levels was calculated in respect previous evaluation at the end of treatment for each patient. The most suitable cut-offs could be identified in an increase in CA 125 levels >10.5% (sensitivity: 67.9%; specificity: 83.6%; LR+: 4.1; LR-: 0.4) in order to predict PD and in a change of -0.5% in order to exclude PD (sensitivity 83.0%; specificity: 69.6%; LR+: 2.7; LR-: 0.2). Site of relapse was abdomen (58.5%), abdomen and chest (33.9%), chest (3.8%), chest and neck (1.9%), and abdomen, chest and neck (1.9%).

CONCLUSIONS

Increase in CA 125 levels >10.5% could be sufficiently predictive of PD requiring CT examination. Change of -0.5% is sufficiently predictive of absence of PD. Increase <10.5% and >0.5% needs clinical correlation to establish correct timing and extension of CT examination. Attention must be played in reducing number and extent of CT examinations to reduce exposure dose.

Endometriosis-associated clear cell carcinoma arising in caesarean section scar: a case report and review of the literature

Background

Malignant transformation has been reported in approximately 1% of the endometriosis cases; herein, we report a case of clear cell endometrial carcinoma arising from endometriosis foci located within a caesarean section scar.

Case presentation

In November 2014, a Caucasian, 44-year-old woman was transferred to our institution because of severe respiratory failure due to massive lung embolism and rapid enlargement of a subcutaneous suprapubic mass. Abdomino-pelvic magnetic resonance showed a 10.5 × 5.0 × 5.0 cm subcutaneous solid mass involving the rectus abdominis muscle. Pelvic organs appeared normal, while right external iliac lymph nodes appeared enlarged (maximum diameter = 16 mm). A whole-body positron emission tomography/computed tomography scan showed irregular uptake of the radiotracer in the 22 cm mass of the abdominal wall, and in enlarged external iliac and inguinal lymph nodes. In December 2014, the patient underwent exploratory laparoscopy showing normal adnexae and pelvic organs; peritoneal as well as cervical, endometrial and vesical biopsies were negative. The patient was administered neo-adjuvant chemotherapy with carboplatin and paclitaxel, weekly, without benefit and then underwent wide resection of the abdominal mass, partial removal of rectus abdominis muscle and fascia, radical hysterectomy, bilateral salpingo-oophorectomy, and inguinal and pelvic lymphadenectomy. The muscular gap was repaired employing a gore-tex mesh while the external covering was made by a pedicled perforator fasciocutaneous anterolateral thigh flap. Final diagnosis was clear cell endometrial adenocarcinoma arising from endometriosis foci within the caesarean section scar. Pelvic and inguinal lymph nodes were metastatic. Tumor cells were positive for CK7 EMA, CKAE1/AE3, CD15, CA-125, while immunoreaction for Calretinin, WT1, estrogen, and progesterone receptors, cytokeratin 20, CD10, alpha fetoprotein, CDX2, TTF1, and thyroglobulin were all negative. Liver relapse occurred after 2 months; despite 3 cycles of pegylated liposomal doxorubicin (20 mg/m², biweekly administration), the death of the patient disease occurred 1 month later.

Conclusions

Attention should be focused on careful evaluation of patient history in terms of pelvic surgery, and symptoms suggestive of endometriosis such as repeated occurrence of endometriosis nodules at CS scar, or cyclic pain, or volume changes of the nodules.

Bioclinical parameters driving decision-making of subsequent lines of treatment in metastatic castration-resistant prostate cancer

Different options are available as second-line treatment of metastatic castrate-resistant prostate cancer: cabazitaxel, abiraterone, and enzalutamide. Phase III studies evaluating cabazitaxel and the two hormonal agents have been shown to significantly prolong overall survival compared to mitoxantrone and placebo, respectively. Several studies have also demonstrated feasibility and activity of docetaxel rechallenge in case of a sufficient progression-free interval (3-6 months), good performance status, and previous acceptable safety profile, thus providing an additional treatment option in clinical practice. Clinical and biological parameters should be considered to tailor II line treatment. In clinical practice, we can primarily evaluate patients' fitness according to age, performance status, symptomatic disease, comorbidities, and expected safety profile of each drug. Different prognostic/predictive factors may be considered, such as presence of bone-limited or visceral metastases, length of androgen deprivation therapy (ADT) before chemotherapy, time to progression after docetaxel, Gleason score, PSA doubling time, and serum testosterone, even if their clinical relevance is still debated. This review will discuss current options of innovative drugs sequencing and selection according to bioclinical parameters.

Modulation of GemOx chemotherapy according to CIRS in elderly patients with advanced pancreatic cancer

The present study evaluated activity and toxicity of modulated doses of gemcitabine associated to oxaliplatin in patients with secondary CIRS and with locally advanced pancreatic adenocarcinoma (LAPC) and metastatic pancreatic adenocarcinoma (MPC). Since January 2006, untreated LAPC and MPC patients have been assessed with ADL, IADL, CIRS to modulate chemotherapy dosages according to co-morbidity stage. Patiens aged<75 years, co-morbidity stage primary/intermediate, or ≥75 years and co-morbidity stage primary, received gemcitabine 1,000 mg/m² as a 10 mg/m²/min infusion on day 1 and oxaliplatin 70 mg/m² as a 2-h infusion on day 2 every 2 weeks. Patiens aged<75 years, co-morbidity stage secondary or ≥75 years and co-morbidity stage intermediate/secondary patients received gemcitabine 800 mg/m². Primary endpoint was the overall response rate (ORR). Secondary endpoints were disease control rate (DCR), PFS, OS and toxicity. Thirty-one patients were recruited: 26% (8/31) LAPC and 74% (23/31) MPC; median age 69 years. Co-morbidity stage primary/intermediate, 19; secondary, 12. Twenty-seven valuable patients: ORR 30% (CI±0.14); disease control rate 85% (CI±0.18). Median follow-up 13 months: median PFS and OS were 6 and 15 months, respectively. Valuable cycles 140. Grade 3/4 toxicity per patient: leukopenia, 18.5%; neutropenia, 55,5%; thrombocytopenia, 7.4%; SGOT/SGPT, 7.4%; gamma-GT, 7.4%; fever without neutropenia, 3.7%. Median received dose intensity: gemcitabine 400 mg/m2/w; oxaliplatin 35 mg/m2/w. Modulation of GemOx chemotherapy according, to CIRS stage in advanced pancreatic cancer confirms reported efficacy and tolerability.