Ethem Ömeroğlu

Dr. Ethem Ömeroğlu

orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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25 September 2024 in Translational Oncology
Verified
Journal Article
Open access
EÖEthem Ömeroğlu
Ethem Ömeroğlu
Gastric cancer (GC) is the third leading cause of cancer-related deaths worldwide. The present study examined the relationship between Upregulated gene 4 (URG4) expression, an oncogene involved in the development of gastric carcinoma, and clinicopathologic parameters including Human epidermal growth factor receptor 2 (HER2) status. The study aimed to investigate the importance of URG4 as a prognostic factor for 2-year survival in GCs, which are usually in the advanced stage at the time of diagnosis and have a rapid course. In 61 patients with GC, URG4 expression results in paraffin blocks were compared with the patients' clinicopathologic, 2-year survival, and HER2 results. Among the patients, 24 (39 %) had low URG4 scores (scores 0-4) and 37 (61 %) had high URG4 scores (scores 6-9). While the HER2 score was negative in 52 (85 %)patients, it was positive in 9 (15 %). URG4 expression values were significantly correlated with tumor (T) stage and lymphovascular invasion (LVI) (p < 0.005), whereas no significant correlation was determined between other pathological prognostic factors and HER2 status (p > 0.005). During the two-year period, 32 (52 %) patients survived and 29 (48 %) died. The mean duration of survival was 75.20 ± 35.22 weeks. A significant correlation was determined between URG4 values and survival and mortality results (p < 0.05). We revealed a correlation (p < 0.005) between increased URG4 scores with increased T stage and LVI. We demonstrated an association between increased URG4 expression and survival time and mortality in patients with GC during the first two years of survival (p < 0.005) and URG4 and HER2 yielded similar results as prognostic factors in the survival of the patients URG4 is an essential oncogene in malignancies, especially in gastric GC, requiring further research and development in prognostic and therapeutic areas.

29 August 2025 in Medicine
Verified
Journal Article
Open access
YÜYaşar Ünlü
Yaşar Ünlü
EÖEthem Ömeroğlu
Ethem Ömeroğlu
SASerden AY
Serden AY
MKMeryem İlkay Eren Karamis
Meryem İlkay Eren Karamis
AKAyşe Nur Uğur Kılınç
Ayşe Nur Uğur Kılınç
EYEsra Yilmaz
Esra Yilmaz
Breast cancer is a heterogeneous disease in which estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2), and Ki-67 play crucial roles in molecular subtyping, diagnosis, treatment, and prognosis, showing positivity in nearly 90% of cases. The vitamin D receptor (VDR) has been implicated in the oncogenesis and prognosis of various tumors, but its relationship with molecular subtyping factors in breast carcinomas remains to be clarified. This retrospective cross-sectional study included 111 patients who underwent surgery for breast carcinoma. Clinicopathological data were retrospectively analyzed in relation to VDR expression. Histological grade, hormone receptor (HR) status, Ki-67 proliferation index, and other clinicopathological parameters were recorded and their associations with VDR expression were statistically evaluated. Histological grading showed grade 1 in 3.7%, grade 2 in 41.4%, and grade 3 in 54.9% of cases. HR positivity was found in 60.3% of patients, while 39.7% were HR-negative. Ki-67 expression was ≥20% in 65.7% and <20% in 34.3% of cases. VDR expression was low in 54%, moderate in 26.1%, and high in 19.9% of patients. A strong correlation ( P < .001) was observed between VDR expression and ER, PR, HR, and Ki-67, while a significant association ( P = .025) was found with necrosis and mortality. Additionally, no significant correlation with histological grade ( P = .056) was noted. The findings suggest a strong association between VDR and ER, PR status, and the Ki-67 proliferation index in breast carcinoma. Further studies are needed to explore the diagnostic, prognostic, and therapeutic implications of VDR in breast cancer.

14 February 2022 in Cureus
Verified
Journal Article
Open access
CUCüneyt Uğur
Cüneyt Uğur
UMUğur C. Mete
Uğur C. Mete
EÖEthem Ömeroğlu
Ethem Ömeroğlu
Multisystem Inflammatory Syndrome (MIS-C) in children associated with SARS-CoV-2 infection has a variable clinical presentation because it affects many systems. It can affect the cardiac, renal, respiratory, hematological, gastrointestinal, dermatological, and neurological systems. If left untreated, it causes fatal complications. In this case report, a five-year-old male patient was admitted to the pediatric emergency service with complaints of fever, nausea, vomiting, abdominal pain, and loss of appetite. Physical examination revealed tenderness, defense, and rebound in the right lower quadrant of the abdomen. On ultrasound, the diameter of the appendix was determined as 6.8 mm. The patient, who was operated on for acute appendicitis (AA), was re-evaluated after fever and vomiting did not resolve, and he was diagnosed with MIS-C. This case was presented to remind that MIS-C should be excluded before the diagnosis of AA in patients with fever for more than 24 hours, gastrointestinal symptoms, and findings of AA.

29 May 2026 in BMC Gastroenterology
Verified
Journal Article
Open access
PDF file
YGYakup Gezer
Yakup Gezer
MTMuhammet Rıdvan Tayşi
Muhammet Rıdvan Tayşi
ATArzu Tarakçı
Arzu Tarakçı
SASevil Alkan
Sevil Alkan
SKSelçuk Kaya
Selçuk Kaya
EÖEthem Ömeroğlu
Ethem Ömeroğlu
The coexistence of metabolic dysfunction-associated steatotic liver disease (MASLD) and chronic hepatitis B (CHB) may influence liver fibrosis, but the rel

11 November 2025 in Saudi Medical Journal
Verified
Journal Article
Open access
PDF file
EÖEthem Ömeroğlu
Ethem Ömeroğlu
AAAbdülhalim Serden Ay
Abdülhalim Serden Ay
TGTuğba Günler
Tuğba Günler
IKİlKnur Küçükosmanoğlu
İlKnur Küçükosmanoğlu
SKSümeyye Kozacıoğlu
Sümeyye Kozacıoğlu
Objectives: To investigate the association of β-galactoside α2-6 sialyltransferase 1 (ST6GAL1) expression with hormone receptor (HR), human epidermal growth factor receptor 2 (HER2), and other clinicopathological parameters, including histological grade, stage, lymphovascular invasion, perineural invasion, and survival in breast carcinomas (BCs). Methods: This study included 85 patients who had undergone surgery for breast cancer (BC). The associations of HR, HER2 status, and histopathologic tumor characteristics with immunohistochemical expression of ST6GAL1 were analyzed. Results: The majority (48 [56.5%]) of patients were in the T2 stage, and no association was seen between staging and ST6GAL1 (p<0.05). Further, 44 (54.2%) patients were HR positive, and most of them exhibited high ST6GAL1 levels (p=0.001), whereas 44 (51.8%) were HER2 negative, and most of them demonstrated low ST6GAL1 levels (p=0.007). Ki-67 of ≥20% was observed in 55 (64.7%) and <20% in 30 (35.3%) patients. Most of those with high Ki-67 demonstrated low-grade STLGAL1 expression; however, no correlation was detected between the two values (p=0.378). High and low ST6GAL1 expressions were observed in 39 (45.9%) and 46 (54.1%) cases, respectively. Conclusion: This research is one of the first studies to use ST6GAL1 in preoperative biopsies of patients not scheduled for neoadjuvant treatment. This study revealed highly significant associations of ST6GAL1 expression with HR, HER2, and molecular subtyping. Future studies are recommended to clarify the possible role of ST6GAL1 in resistance to HR and HER2-targeted and other chemotherapeutic agents in BCs.

15 January 2024 in Anatolian Current Medical Journal
Verified
Journal Article
Open access
PDF file
EÖEthem Ömeroğlu
Ethem Ömeroğlu
AKAyşe Nur Uğur Kılınç
Ayşe Nur Uğur Kılınç
Aims: To determine the differences in duodenal biopsies of diabetes mellitus (DM) patients and non-diabetic patients by investigating the numbers of immunoglobulin E (IgE) positive plasma cells, IgE positive mast cells, and eosinophils. Methods: Patients diagnosed with chronic duodenitis and DM and those diagnosed only with chronic duodenitis within between 2010-2020 years were detected from the hospital information system. Paraffin blocks and hematoxylin-eosin-stained preparations of the patients’ duodenal biopsies were obtained from the hospital’s pathology archive. By performing IgE immunohistochemical staining for all blocks, the sections were evaluated through light microscopy. Results: A total of 75 patients, 45 with DM and 30 non-diabetic patients with chronic duodenitis were included in the study. While IgE accumulation was prominently detected in the plasma cells and mast cells of DM patients’ duodenal tissue samples, no significant IgE accumulation was detected in the biopsies of non-diabetic patients with chronic duodenitis. Conclusion: To date, the effectiveness of mast cells, IgE, and duodenal histological changes in DM have been proven, but our study is the first to detect the increase in mast cells and IgE in duodenal biopsies of DM patients. High IgE in the duodenum could support the relationship between DM and food allergy. We consider that higher IgE antibodies detected in diabetic patients’ duodenums will reveal promising novel results in elucidating DM pathophysiology and regulating the treatment modalities, and will shed light on future studies.