Huseyin Alkim
Research Subjects
Huseyin Alkim has a total of 220 co-authors. Here are the top co-authors by number of shared publications:
- Canan Alkim
Sisli Etfal Training and Research Hospital
34 shared publications - Ali Riza Koksal
Department of Gastroenterology, Sisli Hamidiye Etfal Education and Research Hospital, Istanbul, Turkey
23 shared publications Salih Boga
10 shared publicationsMehmet Bayram
Gastroenterology Clinic, Sisli Hamidiye Etfal Education and Research Hospital, Istanbul, Turkey
9 shared publications- Mehmet Bayram
Department of Gastroenterology, Türkiye Hospital, 34381 Istanbul, Türkiye
9 shared publications Ilker Sen
7 shared publications
Latest Publications
- 14 October 2026
- Published by Springer Nature in Irish Journal of Medical Science (1971 -)
- p. 1-9
Beyond seropositivity: quantitative parietal cell antibody titers predict gastric intestinal metaplasia in a high helicobacter pylori prevalence setting
Purpose Anti-gastric parietal cell antibody (APA) positivity is a recognized serological biomarker for autoimmune gastritis, but whether quantitative APA titer levels correlate with the severity of gastric intestinal metaplasia (GIM) in high Helicobacter pylori (H. pylori) prevalence settings remains unclear. This study aimed to evaluate the association between quantitative APA titer dilutions and histopathological GIM in a large endoscopic cohort. Methods In this retrospective cohort study, medical records of adult patients who underwent APA testing at a tertiary referral center between November 2017 and November 2019 were reviewed. Of 1,104 screened patients, 453 met inclusion criteria after excluding those with repeated testing or missing data; following exclusion of 118 patients without gastroscopy or adequate biopsy sampling, 335 patients who underwent standardized topographical gastric biopsy mapping constituted the definitive analysis cohort. Associations between APA status/titer dilutions and histopathological findings were assessed using chi-squared tests and multivariate logistic regression. Results GIM was present in 24.5% (n = 82) of the cohort. APA positivity was significantly associated with GIM (40.5% vs. 15.4% in APA-negative patients, p 1:320 dilution subgroups. In multivariate analysis, each incremental step-up in APA titer dilution (OR 1.522, 95% CI 1.304-1.776) and advancing age (OR 1.043, 95% CI 1.021-1.066) independently predicted GIM, while active H. pylori infection was an independent negative predictor (OR 0.348, 95% CI 0.184-0.660). Conclusion Quantitative APA titers, rather than binary positivity, demonstrate a clear dose-response relationship with histopathological GIM. Titers of 1:320 or greater identify a clinically actionable threshold that may guide prioritization of endoscopic evaluation with standardized topographical biopsy mapping.
- 14 October 2026
- Published by Springer Nature in Irish Journal of Medical Science (1971 -)
- p. 1-9
Beyond seropositivity: quantitative parietal cell antibody titers predict gastric intestinal metaplasia in a high helicobacter pylori prevalence setting
Purpose Anti-gastric parietal cell antibody (APA) positivity is a recognized serological biomarker for autoimmune gastritis, but whether quantitative APA titer levels correlate with the severity of gastric intestinal metaplasia (GIM) in high Helicobacter pylori (H. pylori) prevalence settings remains unclear. This study aimed to evaluate the association between quantitative APA titer dilutions and histopathological GIM in a large endoscopic cohort. Methods In this retrospective cohort study, medical records of adult patients who underwent APA testing at a tertiary referral center between November 2017 and November 2019 were reviewed. Of 1,104 screened patients, 453 met inclusion criteria after excluding those with repeated testing or missing data; following exclusion of 118 patients without gastroscopy or adequate biopsy sampling, 335 patients who underwent standardized topographical gastric biopsy mapping constituted the definitive analysis cohort. Associations between APA status/titer dilutions and histopathological findings were assessed using chi-squared tests and multivariate logistic regression. Results GIM was present in 24.5% (n = 82) of the cohort. APA positivity was significantly associated with GIM (40.5% vs. 15.4% in APA-negative patients, p 1:320 dilution subgroups. In multivariate analysis, each incremental step-up in APA titer dilution (OR 1.522, 95% CI 1.304-1.776) and advancing age (OR 1.043, 95% CI 1.021-1.066) independently predicted GIM, while active H. pylori infection was an independent negative predictor (OR 0.348, 95% CI 0.184-0.660). Conclusion Quantitative APA titers, rather than binary positivity, demonstrate a clear dose-response relationship with histopathological GIM. Titers of 1:320 or greater identify a clinically actionable threshold that may guide prioritization of endoscopic evaluation with standardized topographical biopsy mapping.
- Open Access
- 1 December 2023
- Published by Galenos Yayinevi in Turkish Journal of Surgery
- Vol. 39 (4) , 383-386
Primary pancreatic hydatid disease: A rare presentation of echinococcosis
Hydatid disease is a zoonotic parasitic disease which rarely involves pancreas primarily. Diagnosis of pancreatic hydatid cyst is a challenge and operative skills are important to avoid spillage of cyst’s content. A 19-year-old male patient was admitted to hospital with recurrent abdominal pain which was on epigastrium and left upper quadrant of abdomen. Pain was not associated with nausea, vomiting or fever. An abdominal computed tomography (CT) scan was ordered. As a result of abdominal CT scan, there was a cystic area in tail of pancreas with a diameter of 5.6 cm which includes septa and there was calcification on borders of the cyst. Possible diagnosis were either pancreatic hydatid disease, pancreatic cyst adenoma or cystadenocarcinoma or pseudocyst of autoimmune pancreatitis. Whole body positron emission tomography (PET-CT) scan showed no other cyst or lesion other than pancreatic cyst. Hydatid disease indirect hemagglutination test has been studied and it was positive. Imaging studies and laboratory results were suggested hydatid disease and laparoscopic distal pancreatectomy has been applied. Primary pancreatic hydatid disease should be in differential diagnosis when newly appearing pancreatic cyst has been diagnosed, especially in endemic areas. Appropriate surgical technique has to be applied to avoid dissemination of cyst’s content.
- 1 December 2023
- Published by Galenos Yayinevi in Turkish Journal of Surgery
- Vol. 39 (4) , 383-386
Open AccessPrimary pancreatic hydatid disease: A rare presentation of echinococcosis
Hydatid disease is a zoonotic parasitic disease which rarely involves pancreas primarily. Diagnosis of pancreatic hydatid cyst is a challenge and operative skills are important to avoid spillage of cyst’s content. A 19-year-old male patient was admitted to hospital with recurrent abdominal pain which was on epigastrium and left upper quadrant of abdomen. Pain was not associated with nausea, vomiting or fever. An abdominal computed tomography (CT) scan was ordered. As a result of abdominal CT scan, there was a cystic area in tail of pancreas with a diameter of 5.6 cm which includes septa and there was calcification on borders of the cyst. Possible diagnosis were either pancreatic hydatid disease, pancreatic cyst adenoma or cystadenocarcinoma or pseudocyst of autoimmune pancreatitis. Whole body positron emission tomography (PET-CT) scan showed no other cyst or lesion other than pancreatic cyst. Hydatid disease indirect hemagglutination test has been studied and it was positive. Imaging studies and laboratory results were suggested hydatid disease and laparoscopic distal pancreatectomy has been applied. Primary pancreatic hydatid disease should be in differential diagnosis when newly appearing pancreatic cyst has been diagnosed, especially in endemic areas. Appropriate surgical technique has to be applied to avoid dissemination of cyst’s content.
- Open Access
- 1 January 2023
- Published by Kare Publishing in Hepatology Forum
- Vol. 4 (3) , 92-96
The efficacy and tolerability of glecaprevir/pibrentasvir treatment in a real-world chronic hepatitis C patients cohort
Background and Aim: The aims of the present study were to evaluate the real-life efficacy and tolerability of glecaprevir (GLE)/pibrentasvir (PIB) in the treatment of patients with chronic hepatitis C (CHC). Materials and Methods: Between May 2019 and May 2022, 686 patients with CHC, treated with GLE/PIB combination from 21 participating centers in Turkiye, were enrolled in the study. Results: All patients were Caucasian, and their median age was 56 years. At the start of GLE/PIB treatment, the median serum Hepatitis C virus RNA and serum alanine amino transaminase (ALT) levels were 6.74 log10 IU/mL and 47 U/L, respectively. Fifty-three percent of the patients were infected with genotype 1b, followed by genotype 3 (17%). Diabetes was the more common concomitant disease. The sustained virological response (SVR12) was 91.4% with intent-to-treat analysis and 98.5% with per proto-col analysis. The SVR12 rates were statistically significant differences be-tween the patients who were i.v. drug users and non-user (88.0% vs. 98.8%,p=0.025). From the baseline to SVR12, the serum ALT levels and Model for End-Stage Liver Disease score were significantly improved (p
- 1 January 2023
- Published by Kare Publishing in Hepatology Forum
- Vol. 4 (3) , 92-96
Open AccessThe efficacy and tolerability of glecaprevir/pibrentasvir treatment in a real-world chronic hepatitis C patients cohort
Background and Aim: The aims of the present study were to evaluate the real-life efficacy and tolerability of glecaprevir (GLE)/pibrentasvir (PIB) in the treatment of patients with chronic hepatitis C (CHC). Materials and Methods: Between May 2019 and May 2022, 686 patients with CHC, treated with GLE/PIB combination from 21 participating centers in Turkiye, were enrolled in the study. Results: All patients were Caucasian, and their median age was 56 years. At the start of GLE/PIB treatment, the median serum Hepatitis C virus RNA and serum alanine amino transaminase (ALT) levels were 6.74 log10 IU/mL and 47 U/L, respectively. Fifty-three percent of the patients were infected with genotype 1b, followed by genotype 3 (17%). Diabetes was the more common concomitant disease. The sustained virological response (SVR12) was 91.4% with intent-to-treat analysis and 98.5% with per proto-col analysis. The SVR12 rates were statistically significant differences be-tween the patients who were i.v. drug users and non-user (88.0% vs. 98.8%,p=0.025). From the baseline to SVR12, the serum ALT levels and Model for End-Stage Liver Disease score were significantly improved (p
- 15 April 2022
- Published by AVES YAYINCILIK A.Ş. in Turkish Journal of Gastroenterology
- Vol. 33 (4) , 286-293
A New Risk-Scoring System for Colorectal Cancer and Polyp Screening by Turkish Colorectal Cancer and Polyp Study Group
Background: Colorectal cancer is one of the most commonly diagnosed types of cancer worldwide. An early diagnosis and detection of colon cancer and polyp can reduce mortality and morbidity from colorectal cancer. Even though there are a variety of options in screen- ing tests, the question remains on which test is the most effective for the early detection of colorectal cancer. In this prospective study, we aimed to develop a simple, useful, effective, and reliable scoring system to detect colon polyp and colorectal cancer. Methods: We enrolled 6508 subjects over the age of 18 from 16 centers, with colonoscopy screening. The age, smoking status, alcohol consumption, body mass index, polyp incidence, polyp size, number and localization, and pathologic findings were recorded. Results: The age, male gender, obesity, smoking, and family history were found as independent risk factors for adenomatous polyp. We have developed a new scoring system which can be used for these factors. With a score of 4 or above, we found the following: sensitivity 81%, specificity 40%, positive predictive value 25.68%, and negative predictive value 89.84%, for adenomatous polyp detection; and sensitivity 96%, specificity 39%, positive predictive value 3.35%, negative predictive value 99.29%, for colorectal cancer detection. Conclusion: Even though the first colorectal cancer screening worldwide is generally performed for individuals over 50 years of age, we recommend that screening for colorectal cancer might begin for those under 50 years of age as well. Individuals with a score ≥ 4 must be included in the screening tests for colorectal cancer.
- 15 April 2022
- Published by AVES YAYINCILIK A.Ş. in Turkish Journal of Gastroenterology
- Vol. 33 (4) , 286-293
A New Risk-Scoring System for Colorectal Cancer and Polyp Screening by Turkish Colorectal Cancer and Polyp Study Group
Background: Colorectal cancer is one of the most commonly diagnosed types of cancer worldwide. An early diagnosis and detection of colon cancer and polyp can reduce mortality and morbidity from colorectal cancer. Even though there are a variety of options in screen- ing tests, the question remains on which test is the most effective for the early detection of colorectal cancer. In this prospective study, we aimed to develop a simple, useful, effective, and reliable scoring system to detect colon polyp and colorectal cancer. Methods: We enrolled 6508 subjects over the age of 18 from 16 centers, with colonoscopy screening. The age, smoking status, alcohol consumption, body mass index, polyp incidence, polyp size, number and localization, and pathologic findings were recorded. Results: The age, male gender, obesity, smoking, and family history were found as independent risk factors for adenomatous polyp. We have developed a new scoring system which can be used for these factors. With a score of 4 or above, we found the following: sensitivity 81%, specificity 40%, positive predictive value 25.68%, and negative predictive value 89.84%, for adenomatous polyp detection; and sensitivity 96%, specificity 39%, positive predictive value 3.35%, negative predictive value 99.29%, for colorectal cancer detection. Conclusion: Even though the first colorectal cancer screening worldwide is generally performed for individuals over 50 years of age, we recommend that screening for colorectal cancer might begin for those under 50 years of age as well. Individuals with a score ≥ 4 must be included in the screening tests for colorectal cancer.
- 14 February 2022
- Published by Taylor & Francis in Journal of Obstetrics and Gynaecology
- Vol. 42 (5) , 1174-1178
The effectiveness of small heterodimer partner and FGF 19 levels in prediction of perinatal morbidity in intrahepatic cholestasis of pregnancy
Fibroblast growth factor 19 (FGF19) and small heterodimer partner (SHP) are molecules responsible for controlling serum bile acid levels. We designed this study for evaluating the effects of FGF 19 and SHP in intrahepatic cholestasis of pregnancy (ICP). Fifty-six pregnant women having ICP and 20 healthy pregnant women were included in the study. The patients were followed up until delivery in terms of pregnancy-related morbidity/mortality. Serum FGF 19 and SHP levels were determined by enzyme-linked immunosorbent assay (ELISA). Serum FGF 19 and SHP levels were significantly higher in the patient group compared to the control group (p: .04, p: .003, respectively). In ROC analysis, SHP level above 1995 ng/L was found effective in predicting the need for neonatal intensive care unit (ICU) follow-up with 53.8% sensitivity and 77.8% specificity. High SHP levels were correlated with perinatal morbidity, mortality and neonatal ICU hospitalisation.
- 14 February 2022
- Published by Taylor & Francis in Journal of Obstetrics and Gynaecology
- Vol. 42 (5) , 1174-1178
The effectiveness of small heterodimer partner and FGF 19 levels in prediction of perinatal morbidity in intrahepatic cholestasis of pregnancy
Fibroblast growth factor 19 (FGF19) and small heterodimer partner (SHP) are molecules responsible for controlling serum bile acid levels. We designed this study for evaluating the effects of FGF 19 and SHP in intrahepatic cholestasis of pregnancy (ICP). Fifty-six pregnant women having ICP and 20 healthy pregnant women were included in the study. The patients were followed up until delivery in terms of pregnancy-related morbidity/mortality. Serum FGF 19 and SHP levels were determined by enzyme-linked immunosorbent assay (ELISA). Serum FGF 19 and SHP levels were significantly higher in the patient group compared to the control group (p: .04, p: .003, respectively). In ROC analysis, SHP level above 1995 ng/L was found effective in predicting the need for neonatal intensive care unit (ICU) follow-up with 53.8% sensitivity and 77.8% specificity. High SHP levels were correlated with perinatal morbidity, mortality and neonatal ICU hospitalisation.
- 27 August 2021
- Published by Galenos Yayinevi in Journal of Academic Research in Medicine
- Vol. 11 (2) , 230-233
A Rare Cause of Rectal Bleeding in Children Mimicking Rectal Cancer
- 27 August 2021
- Published by Galenos Yayinevi in Journal of Academic Research in Medicine
- Vol. 11 (2) , 230-233
A Rare Cause of Rectal Bleeding in Children Mimicking Rectal Cancer
- Open Access
- 1 January 2021
- Published by Kare Publishing in SiSli Etfal Hastanesi Tip Bulteni / The Medical Bulletin of Sisli Hospital
- Vol. 56 (1) , 113-118
The Efficiency of Fractional Anisotropy, Apparent Diffusion Coefficient and Contrast Enhancement Index in Liver Fibrosis Staging
The Medical Bulletin of Sisli Etfal Hospital
- 1 January 2021
- Published by Kare Publishing in SiSli Etfal Hastanesi Tip Bulteni / The Medical Bulletin of Sisli Hospital
- Vol. 56 (1) , 113-118
Open AccessThe Efficiency of Fractional Anisotropy, Apparent Diffusion Coefficient and Contrast Enhancement Index in Liver Fibrosis Staging
The Medical Bulletin of Sisli Etfal Hospital
- 15 December 2020
- Published by AVES YAYINCILIK A.Ş. in Turkish Journal of Gastroenterology
- Vol. 31 (12) , 883-893
Real-world efficacy and safety of Ledipasvir + Sofosbuvir and Ombitasvir/Paritaprevir/Ritonavir ± Dasabuvir combination therapies for chronic hepatitis C: A Turkish experience
Background/Aims: This study aimed to evaluate the real-life efficacy and tolerability of direct-acting antiviral treatments for patients with chronic hepatitis C (CHC) with/without cirrhosis in the Turkish population. Material and Methods: A total of 4,352 patients with CHC from 36 different institutions in Turkey were enrolled. They received ledipasvir (LDV) and sofosbuvir (SOF)±ribavirin (RBV) orombitasvir/paritaprevir/ritonavir±dasabuvir (PrOD)±RBV for 12 or 24 weeks. Sustained virologic response (SVR) rates, factors affecting SVR, safety profile, and hepatocellular cancer (HCC) occurrence were analyzed. Results: SVR12 was achieved in 92.8% of the patients (4,040/4,352) according to intention-to-treat and in 98.3% of the patients (4,040/4,108) according to per-protocol analysis. The SVR12 rates were similar between the treatment regimens (97.2%–100%) and genotypes (95.6%–100%). Patients achieving SVR showed a significant decrease in the mean serum alanine transaminase (ALT) levels (50.90±54.60 U/L to 17.00±14.50 U/L) and model for end-stage liver disease (MELD) scores (7.51±4.54 to 7.32±3.40) (p<0.05). Of the patients, 2 were diagnosed with HCC during the treatment and 14 were diagnosed with HCC 37.0±16.0 weeks post-treatment. Higher initial MELD score (odds ratio [OR]: 1.92, 95% confidence interval [CI]: 1.22–2.38; p=0.023]), higher hepatitis C virus (HCV) RNA levels (OR: 1.44, 95% CI: 1.31–2.28; p=0.038), and higher serum ALT levels (OR: 1.38, 95% CI: 1.21–1.83; p=0.042) were associated with poor SVR12. The most common adverse events were fatigue (12.6%), pruritis (7.3%), increased serum ALT (4.7%) and bilirubin (3.8%) levels, and anemia (3.1%). Conclusion: LDV/SOF or PrOD±RBV were effective and tolerable treatments for patients with CHC and with or without advanced liver disease before and after liver transplantation. Although HCV eradication improves the liver function, there is a risk of developing HCC.
- 15 December 2020
- Published by AVES YAYINCILIK A.Ş. in Turkish Journal of Gastroenterology
- Vol. 31 (12) , 883-893
Real-world efficacy and safety of Ledipasvir + Sofosbuvir and Ombitasvir/Paritaprevir/Ritonavir ± Dasabuvir combination therapies for chronic hepatitis C: A Turkish experience
Background/Aims: This study aimed to evaluate the real-life efficacy and tolerability of direct-acting antiviral treatments for patients with chronic hepatitis C (CHC) with/without cirrhosis in the Turkish population. Material and Methods: A total of 4,352 patients with CHC from 36 different institutions in Turkey were enrolled. They received ledipasvir (LDV) and sofosbuvir (SOF)±ribavirin (RBV) orombitasvir/paritaprevir/ritonavir±dasabuvir (PrOD)±RBV for 12 or 24 weeks. Sustained virologic response (SVR) rates, factors affecting SVR, safety profile, and hepatocellular cancer (HCC) occurrence were analyzed. Results: SVR12 was achieved in 92.8% of the patients (4,040/4,352) according to intention-to-treat and in 98.3% of the patients (4,040/4,108) according to per-protocol analysis. The SVR12 rates were similar between the treatment regimens (97.2%–100%) and genotypes (95.6%–100%). Patients achieving SVR showed a significant decrease in the mean serum alanine transaminase (ALT) levels (50.90±54.60 U/L to 17.00±14.50 U/L) and model for end-stage liver disease (MELD) scores (7.51±4.54 to 7.32±3.40) (p<0.05). Of the patients, 2 were diagnosed with HCC during the treatment and 14 were diagnosed with HCC 37.0±16.0 weeks post-treatment. Higher initial MELD score (odds ratio [OR]: 1.92, 95% confidence interval [CI]: 1.22–2.38; p=0.023]), higher hepatitis C virus (HCV) RNA levels (OR: 1.44, 95% CI: 1.31–2.28; p=0.038), and higher serum ALT levels (OR: 1.38, 95% CI: 1.21–1.83; p=0.042) were associated with poor SVR12. The most common adverse events were fatigue (12.6%), pruritis (7.3%), increased serum ALT (4.7%) and bilirubin (3.8%) levels, and anemia (3.1%). Conclusion: LDV/SOF or PrOD±RBV were effective and tolerable treatments for patients with CHC and with or without advanced liver disease before and after liver transplantation. Although HCV eradication improves the liver function, there is a risk of developing HCC.
- 1 July 2020
- Published by Elsevier in Pancreatology
- Vol. 20 (5) , 880-886
Liver and pancreas: ‘Castor and Pollux’ regarding the relationship between hepatic steatosis and pancreas exocrine insufficiency
- 1 July 2020
- Published by Elsevier in Pancreatology
- Vol. 20 (5) , 880-886
Liver and pancreas: ‘Castor and Pollux’ regarding the relationship between hepatic steatosis and pancreas exocrine insufficiency