Current role of Pipelle endometrial sampling in early diagnosis of endometrial cancer.

Endometrial cancer is the most common gynecologic cancer in developed countries. The most prevalent, however not pathognomonic symptom of the disease is abnormal uterine bleeding. The diagnosis of endometrial cancer is based on the histologic results of endometrial sampling. Endometrial biopsy could be obtained using different modalities: hysteroscopy-directed endometrial biopsy, uterine curettage or office endometrial biopsy. Outpatient endometrial biopsy using different devices for the evaluation of abnormal uterine bleeding is gaining popularity. The most popular office-based device for endometrial sampling procedure is the Pipelle device. Currently, Pipelle endometrial sampling is widely used to diagnose endometrial cancer in women with abnormal uterine bleeding and/or postmenopausal bleeding. The method became very useful due to easiness and simplicity of the procedure, availability of a device, as well as high sensitivity in detecting endometrial cancer. Many studies compared the validity and accuracy of Pipelle biopsy with dilation and curettage in the detection of various endometrial pathologies. Published results state that Pipelle biopsy and uterine curettage are almost equally reliable in the evaluation of endometrial pathologies. Moreover, Pipelle biopsy appears more beneficial as it does not require hospital admission and anaesthesia. However, it is proven the Pipelle technique has a limited capacity to identify endometrial polyps, and some authors, based on their study, claim that dilation and curettage is a more reliable method in terms of correlation with the final histological results. In addition, there are many factors affecting the efficiency of the endometrial biopsy. Failure to get samples that are adequate for histological examination is one of the problems associated with Pipelle sampling. The above mentioned contradictory conclusions by different researchers and lack of guidance to avoid inadequate sampling present the demand for further studies on the comparison of Pipelle biopsy and uterine curettage efficiency and accuracy.

Oxidative Stress during Ovarian Torsion in Pediatric and Adolescent Patients: Changing The Perspective of The Disease.

Among the different causes of gynecological acute pelvic pain, ovarian torsion represents a surgical emergency. It is a rare case in the pediatric/adolescent aged group that must be included in the differential diagnosis of any girl with abdominal pain or pelvic/abdominal mass. Current recommendations suggest that laparoscopic detorsion should be performed in order to preserve the integrity of the ovaries and fertility, although oophoropexy may be considered in case of severe necrosis. Nevertheless, maintaining the circulation of the ovary after detorsion deteriorates the tissue injury and leads to a pathologic process called ischaemia/reperfusion (I/R) injury, which is characterized by oxidative stress. During the detorsion process, an excess amount of molecular oxygen is supplied to the tissues, and reactive species of oxygen (ROS) such as superoxide radical (O2 (-)), hydrogen peroxide (H2O2), hydroxyl radical (OH•), as well as reactive nitrogen species (RNS) are produced in excess. ROS, RNS and their toxic products cause DNA damage and lipid peroxidation in the cellular and mitochondrial membranes, leading to cell death. In spite of attention on this topic, currently there is no shared and clear evidence about the use of anti-inflammatory and antioxidant agents to prevent I/R damage after laparoscopic ovarian detorsion. Considering this element, future research should aim to develop shared protocols for the clinical use (route of application, dosage and time of application) of antioxidants after laparoscopic management of this condition.