Publications by authors named "Ayhan A"

Endometriosis is a gynecologic condition characterized by the growth of endometrium-like stroma and glandular elements outside of the uterine cavity. The involvement of hormonal dysregulation, specifically estrogen, is well established in the initiation, progression, and maintenance of the condition. Evidence also highlights the association between endometriosis and altered immune states.

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Article Synopsis
  • The study compared the combination of lenvatinib and pembrolizumab (len + pembro) with traditional chemotherapy for advanced or recurrent endometrial cancer (aEC) in patients who had not previously been treated.
  • Results showed that while len + pembro did not statistically outperform chemotherapy in terms of progression-free survival (PFS) or overall survival (OS), it offered similar outcomes, indicating noninferiority.
  • The trial involved 842 patients and found median PFS and OS were comparable between the two treatment groups, suggesting len + pembro could be an effective alternative to chemotherapy for this cancer type.
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Background: Hemophilia B (HB), an X-linked recessive inherited bleeding disorder, exhibits a high prevalence among males.

Objectives: To present the first national cohort of persons with HB to define the demographics, clinical characteristics, and treatment patterns in Turkey.

Methods: This multicenter, retrospective study included 433 alive persons with HB registered in 35 centers between 1961 and 2018.

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Aim: The aim of this study was to assess whether the use of sentinel lymph node (SLN) in addition to lymphadenectomy was associated with survival benefit in patients with early-stage cervical cancer.

Methods: International, multicenter, retrospective study.

Inclusion Criteria: cervical cancer treated between 01/2007 and 12/2016 by surgery only; squamous cell carcinoma, adenocarcinoma, adenosquamous carcinoma, FIGO 2009 stage IB1-IIA2, negative surgical margins, and laparotomy approach.

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Endometrial carcinoma (EC) is the most frequent gynecological cancer, with an increasing incidence and mortality in recent times. The last decade has represented a true revolution with the development of the integrated histo-molecular classification of EC, which allows for the stratification of patients with morphologically indistinguishable disease into groups with different prognoses. Particularly, the POLE-mutated subgroup exhibits outstanding survival.

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Article Synopsis
  • The study aimed to evaluate the effects of adjuvant treatments and factors affecting recurrence and survival in patients with stage IIB endometrial cancer, using data from surgeries performed in Turkey between 2005 and 2022.
  • Out of 7323 patients, 565 were identified as stage IIB; most received adjuvant radiotherapy, but the study found no significant survival benefits from adjuvant treatments overall.
  • Notably, patients with tumors larger than 4 cm and myometrial invasion greater than 50% had higher recurrence rates, while adjuvant treatment improved overall survival only for those with deep myometrial invasion.
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Background: Examining children's abilities to recognize and regulate their emotions in the context of parental neglect is of significant importance in order to comprehend the dynamics of and to support the development of emotional skills of children, particularly those at risk of neglect. From this point of view, the aim of the study was to examine the mediating role of trait emotional intelligence (trait EI) in the relationship between parental neglect and cognitive emotion regulation strategies (CERS) in children.

Method: The study group consisted of 265 children (135 girls and 130 boys) who were attending two separate primary schools in the city center of Antalya, Turkey.

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Autoimmune cytopenias are a heterogeneous group of disorders characterized by immune-mediated destruction of haematopoietic cell lines. Effective and well-tolerated treatment options for relapsed-refractory immune cytopenias are limited. In this study, the aim was to evaluate the efficacy and safety of sirolimus in this disease group within the paediatric age group.

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Background: The aim of the study was to evaluate the approaches of pediatric rheumatologists and pediatric hematologists to patients with similar musculoskeletal (MSK) complaints and to highlight the differences that general pediatricians should consider when referring patients to these specialties.

Methods: This is a cross-sectional study involving the patients who applied to pediatric rheumatology centers with MSK complaints and were diagnosed with malignancy, as well as patients who were followed up in pediatric hematology centers with a malignancy diagnosis, and had MSK complaints at the time of admission.

Results: A total of 142 patients were enrolled in the study.

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Article Synopsis
  • Pembrolizumab, an immunotherapy drug, is being tested to see if it improves the effectiveness of chemoradiotherapy in patients with locally advanced cervical cancer, based on prior success in similar cases.
  • This phase 3 trial involved multiple international centers and used a double-blind, placebo-controlled design to randomly assign participants to receive either pembrolizumab or a placebo alongside their treatment.
  • The primary goals of the study were to measure progression-free survival and overall survival, assessing treatment safety in those who received at least one dose of the study medication.
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Urinary omics has become a powerful tool for elucidating pathophysiology of glomerular diseases. However, no urinary omics analysis has been performed yet on renal AA amyloidosis. Here, we performed a comparative urine proteomic and metabolomic analysis between recently diagnosed renal AA amyloidosis (AA) and membranous nephropathy (MN) patients.

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The 'Best of ESGO 2023' manuscript comprises a compilation of the best original research presented during the European Society of Gynaecologic Oncology annual congress held in Istanbul between September 28 and October 1, 2023. Out of 1030 submitted abstracts, 33 studies presented during the Best Oral Sessions, Mini Oral Sessions, and Young Investigator Session were selected by the ESGO Abstract Committee and the European Network of Young Gynae Oncologists (ENYGO) authors. There was a strong focus on surgical de-escalation, immunotherapy, maintenance therapy, and molecular profiling in gynecologic oncology.

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Objective: To evaluate colposcopy performance following the human papillomavirus (HPV) DNA screening program in Turkey.

Methods: Women aged 30-65 years are screened for cervical cancer every 5 years, with individuals positive for HPV 16 and/or 18 or other high-risk HPV types with abnormal cytology referred for colposcopy. Both HPV test and cytology are obtained at the same visit.

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Objective: To evaluate oncologic (such as disease-free and overall survival) and obstetric outcomes in patients diagnosed with malignant ovarian germ cell tumors (MOGCTs).

Methods: Patients diagnosed with MOGCTs between March 2007 and February 2022 were evaluated and patients who underwent fertility sparing surgery were included in this retrospective study. The obstetric and oncologic outcomes were evaluated by collecting data up until the patient's last follow-up visit from the hospital records and patient files.

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Effective control of rare diseases requires health programs based on principles of protection and prevention. Carrier screening programs serve as preventive measures by identifying at-risk groups. This review examines the impact, implementation, advantages, and disadvantages of carrier screening, incorporating examples from ten countries: the United States, Canada, the United Kingdom, Israel, China, Australia, Italy, Germany, the Netherlands, and Turkey.

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Background Postoperative acute kidney injury (AKI) is an important cause of mortality and morbidity among surgical patients. There is little information on the occurrence of AKI after operations for gynecologic malignancies. This study aimed to determine the incidence of AKI in patients who underwent surgery for gynecological malignancies and determine the risk factors in those who developed postoperative AKI.

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Background: Sugammadex is a modified gamma-cyclodextrin that has been developed with the goal of reversing the steroidal neuromuscular blocking agents. The aim of the present study is to investigate the effects of different sugammadex doses on embryologic and neural tube development in an early-stage chick embryo model.

Methods: A total of 100 specific pathogen-free, fertilized domestic chicken eggs were randomly divided into five groups (n = 20, each), and placed in an automatic cycle incubator.

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Sedation with intravenous anesthetics is a sedation method that is often preferred during minor surgical procedures for anxious patients. Among the anesthetic agents used are drugs such as midazolam and ketamine, which can cause psychiatric symptoms such as loss of control over the behavior of the person (disinhibition) or dissociation. In people with high anxiety levels, a paradoxical rise of anxiety may rarely occur with midazolam, and emergence agitation or delirium may occur after anesthesia with ketamine.

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Background: International guidelines recommend tailoring the radicality of hysterectomy according to the known preoperative tumor characteristics in patients with early-stage cervical cancer.

Objective: This study aimed to assess whether increased radicality had an effect on 5-year disease-free survival in patients with early-stage cervical cancer undergoing radical hysterectomy. The secondary aims were 5-year overall survival and pattern of recurrence.

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Background: In patients with acute lymphoblastic leukemia (ALL), the risk of thromboembolism increases due to hemostatic changes secondary to the primary disease and due to treatment-related factors. In this multicenter study, we aimed to research the frequency of central nervous system (CNS) thrombosis occurring during treatment, hereditary and acquired risk factors, clinical and laboratory features of patients with thrombosis, treatment approaches, and thrombosis-related mortality and morbidity rates in pediatric ALL patients.

Procedure: Pediatric patients who developed CNS thrombosis during ALL treatment from 2010 to 2021 were analyzed retrospectively in 25 different Pediatric Hematology Oncology centers in Türkiye.

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Objective: The aim of this study was to present our experience in liver transplantation recipients and renal transplantation recipients during caesarean section.

Methods: Retrospective data regarding liver transplantation recipients and renal transplantation recipients who underwent caesarean section between January 1997 and January 2017 have been collected from the hospital records.

Results: Fourteen live births occurred from 5 liver transplantation recipients and 9 renal transplantation recipients, all of them from caesarean section.

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Background: Endometrial carcinosarcomas have high malignant potential with a high recurrence rate and poor prognosis. Immunotherapy may be a promising treatment option. The aim of this study is to evaluate the expression of PD-L1/PD-L2 and its relationship to mismatch repair (MMR) protein status and tumor-infiltrating lymphocyte (TIL) density.

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Loss of progesterone receptor (PR) expression is an established risk factor for unresponsiveness to progesterone therapy in patients with endometrial atypical hyperplasia and endometrioid carcinoma. ARID1A is one of the most commonly mutated genes in endometrioid carcinomas, and the loss of its expression is associated with tumor progression. In this study, we investigated the roles of ARID1A deficiency in PR expression in human and murine endometrial epithelial neoplasia.

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Objective: This study aimed to assess the long-term oncologic and obstetric outcomes of women with epithelial ovarian cancer who underwent fertility-sparing surgery.

Methods: A total of 68 patients observed between March 2007 and July 2021 were included in this retrospective study. Unilateral salpingo-oophorectomy and uterine preservation with staging surgery were the main procedures for fertility-sparing surgery.

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