A. Burgetova

Preoperative staging of ovarian cancer: comparison between ultrasound, CT and whole‐body diffusion‐weighted MRI (ISAAC study)

AbstractObjectivesTo compare the performance of transvaginal and transabdominal ultrasound with that of the first‐line staging method (contrast‐enhanced computed tomography (CT)) and a novel technique, whole‐body magnetic resonance imaging with diffusion‐weighted sequence (WB‐DWI/MRI), in the assessment of peritoneal involvement (carcinomatosis), lymph‐node staging and prediction of non‐resectability in patients with suspected ovarian cancer.MethodsBetween March 2016 and October 2017, all consecutive patients with suspicion of ovarian cancer and surgery planned at a gynecological oncology center underwent preoperative staging and prediction of non‐resectability with ultrasound, CT and WB‐DWI/MRI. The evaluation followed a single, predefined protocol, assessing peritoneal spread at 19 sites and lymph‐node metastasis at eight sites. The prediction of non‐resectability was based on abdominal markers. Findings were compared to the reference standard (surgical findings and outcome and histopathological evaluation).ResultsSixty‐seven patients with confirmed ovarian cancer were analyzed. Among them, 51 (76%) had advanced‐stage and 16 (24%) had early‐stage ovarian cancer. Diagnostic laparoscopy only was performed in 16% (11/67) of the cases and laparotomy in 84% (56/67), with no residual disease at the end of surgery in 68% (38/56), residual disease ≤ 1 cm in 16% (9/56) and residual disease > 1 cm in 16% (9/56). Ultrasound and WB‐DWI/MRI performed better than did CT in the assessment of overall peritoneal carcinomatosis (area under the receiver‐operating‐characteristics curve (AUC), 0.87, 0.86 and 0.77, respectively). Ultrasound was not inferior to CT (P = 0.002). For assessment of retroperitoneal lymph‐node staging (AUC, 0.72–0.76) and prediction of non‐resectability in the abdomen (AUC, 0.74–0.80), all three methods performed similarly. In general, ultrasound had higher or identical specificity to WB‐DWI/MRI and CT at each of the 19 peritoneal sites evaluated, but lower or equal sensitivity in the abdomen. Compared with WB‐DWI/MRI and CT, transvaginal ultrasound had higher accuracy (94% vs 91% and 85%, respectively) and sensitivity (94% vs 91% and 89%, respectively) in the detection of carcinomatosis in the pelvis. Better accuracy and sensitivity of ultrasound (93% and 100%) than WB‐DWI/MRI (83% and 75%) and CT (84% and 88%) in the evaluation of deep rectosigmoid wall infiltration, in particular, supports the potential role of ultrasound in planning rectosigmoid resection. In contrast, for the bowel serosal and mesenterial assessment, abdominal ultrasound had the lowest accuracy (70%, 78% and 79%, respectively) and sensitivity (42%, 65% and 65%, respectively).ConclusionsThis is the first prospective study to document that, in experienced hands, ultrasound may be an alternative to WB‐DWI/MRI and CT in ovarian cancer staging, including peritoneal and lymph‐node evaluation and prediction of non‐resectability based on abdominal markers of non‐resectability. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.

Sentinel lymph node biopsy without systematic pelvic lymphadenectomy in females with early-stage cervical cancer: final outcome of the SENTIX prospective, single-arm, noninferiority, international trial

Sentinel lymph node (SLN) biopsy with ultrastaging is standard in endometrial and vulvar cancers, whereas systematic pelvic lymphadenectomy (PLND) remains recommended in cervical cancer. The SENTIX trial prospectively evaluated the safety of SLN biopsy without PLND in early-stage cervical cancer. Female patients, International Federation of Gynaecology and Obstetrics 2018 stage IA1/LVSI+ to IB2 disease, were enrolled between 2016 and 2020 across 47 sites in 18 countries. All underwent SLN biopsy followed by hysterectomy/trachelectomy. Patients with undetected, unilateral or intraoperatively metastatic SLNs were excluded from the intention-to-treat cohort. SLNs were assessed by pathological ultrastaging. Of 731 patients enrolled, 594 formed the intention-to-treat cohort. SLN metastases were identified in 82 patients (12%), 56.1% intraoperatively and 43.9% by ultrastaging. At 2 years, the recurrence rate was 6.1% (one-sided 95% CI 7.9%), confirming noninferiority to the 7% reference rate. Two-year disease-free and overall survival rates were 93.3% (95% CI 94.9-91.6) and 97.9% (95% CI 98.9-97.0), respectively. Here we show that SLN biopsy without systematic PLND did not increase the risk of recurrence in patients with early-stage cervical cancer. Pathological ultrastaging of SLNs detected about 44% of N1 cases, which would be missed by a standard lymph node assessment. Trial registration: ClinicalTrials.gov ( NCT02494063 ).

Preoperative discrimination between uterine myomas and sarcomas

The narrative review article is focused on the strengths and limitations of modern imaging methods in the preoperative differential diagnosis of uterine mesenchymal tumours. In order to tailor the surgical procedures, imaging methods, namely ultrasound and magnetic resonance imaging (MRI), should be taken into account as well as clinical symptoms, age, and fertility plans. On ultrasound scans, uterine sarcomas have the appearance of large, usually solitary tumours of non-homogenous structure with irregular cysts, ill-defined outline borders (interrupted capsule), absence of calcifications with acoustic shadowing, and moderate to rich internal vascularisation. Rapid growth between follow-ups or atypical growth in peri- or post-menopause is also a sign of malignancy. On MRI, uterine sarcomas are characterized by irregular borders, hyperintense areas on T1-weighted and T2-weighted images, and central non-enhancing necrotic areas. On diffusion-weighted imaging (DWI/MRI), sarcomas exhibit markedly restricted diffusion but there is a significant overlap with some variants of fibroids. Core-needle or hysteroscopic biopsy can be used preoperatively if suspicious features are detected on ultrasound or MRI scans, particularly before myomectomy if fertility preservation is required or when conservative management is considered in asymptomatic women. Other imaging methods, such as positron emission tomography fused with CT (PET-CT) or computed tomography (CT) have limited role to distinguish uterine sarcomas from myomas and are suitable only for staging purposes. The importance of tumour markers including lactate dehydrogenase in preoperative work-up have not been verified yet. Conclusion: Uterine sarcomas can be distinguished from much more common myomas based on a combination of malignant features on ultrasound or MR imaging. In these suspicious cases the type and extent of surgery should be adjusted, avoiding intraperitoneal morcellation, which could lead to iatrogenic tumour spread and worsening of the patient’s prognosis. Key words: myoma – uterine sarcoma – ultrasound – magnetic resonance imaging – biopsy – biomarkers

Sentinel Lymph Node Biopsy in Patients With Early Stages Cervical Cancer

To evaluate whether a less radical surgical approach with sentinel lymph node biopsy is non-inferior to treatment with systematic pelvic lymphadenectomy. The null hypothesis is that the recurrence rate after SLN biopsy is non-inferior to the reference recurrence rate of 7 % (at the 24th month of follow-up) in patients after systematic pelvic lymphadenectomy, but that the less radical surgery is associated with significantly lower postoperative morbidity.