Rayna Shentova

Dr. Rayna Shentova

orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

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

Representative Publications

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10 October 2022 in Medical Principles and Practice
Verified
Journal Article
Open access
Ivan YankovIvan Yankov
Ivan Yankov
RSRayna Shentova
Rayna Shentova
HMHristo Mumdzhiev
Hristo Mumdzhiev
PPPenka Petleshkova
Penka Petleshkova
MKMaya Krasteva
Maya Krasteva
TGTeodora Gogova
Teodora Gogova
Objective: Extrahepatic portal vein thrombosis (EHPVT) is a common cause of portal hypertension in children. The aim of the present study was to identify the clinical manifestations and the risk factors for development of EHPVT in pediatric patients. Subjects and Methods: This was a single-center retrospective cohort study. A total of 12 children (6 boys and 6 girls) took part in the study. We noted the clinical presentations and the predisposing risk factors for development of EHPVT in all patients. In addition, as all of them had undergone an esophagogastroduodenoscopy for detection and grading of esophageal varices as part of the treatment algorithm, we analyzed the endoscopic findings and the therapeutic approach. Results: The median age of subjects at diagnosis was 3.5 years (range: 1–17 years). The most frequent initial clinical manifestation was upper gastrointestinal bleeding (6 cases, 50.0%) followed by splenomegaly (3 cases, 25.0%). The most frequent systemic risk factor for EHPVT was presence of inherited prothrombotic disorder (10 cases, 83.3%), and the most common local risk factor for EHPVT was umbilical vein catheterization (5 cases, 41.7%). Esophageal varices were revealed in all the study participants, and in the most cases, they were grade ≥2. Propranolol was used as primary or secondary prophylaxis in 7 children (58.3%), and in 5 children (41.7%), a shunt was performed (Meso-Rex bypass in 3 children and splenorenal shunt in 2 children). Conclusion: Patients with known systemic or local risk factors for EHPVT are indicated for proactive ultrasound screening for early diagnosis and timely management.

24 September 2021 in Gastroenterology Insights
Verified
Journal Article
Open access
PDF file
RSRayna Shentova
Rayna Shentova
DKDenitza Kofinova
Denitza Kofinova
PHPetyo Hadzhiyski
Petyo Hadzhiyski
PYPenka Yaneva
Penka Yaneva
ELElena Lazarova
Elena Lazarova
MBMila Baycheva
Mila Baycheva
Anemia is the most common extraintestinal manifestation and complication of inflammatory bowel disease (IBD). The aim of our study was to assess the prevalence of anemia in newly diagnosed pediatric patients with IBD and to analyze its association with disease type, extent, and severity. We retrospectively reviewed the medical records of all patients with IBD treated in our department in the period of November 2011 to November 2020. The final analysis included the records of 80 children with newly diagnosed IBD: 45 with ulcerative colitis (UC) and 35 with Crohn’s disease (CD). The prevalence of anemia was 60.0% in the UC patients and 77.1% in the CD patients. Of the UC patients with anemia, 37.1% had pancolitis, 18.5% extensive disease, 33.3% left-sided colitis and 11.1% ulcerative proctitis. Of the CD patients with anemia, 81.5% had ileocolonic disease, 11.1% colonic disease and 7.4% ileal disease. Anemia was less common in patients with mild disease than in patients with moderate–severe disease (22.2 vs. 77.8%, p < 0.001 in UC and 25.9% vs. 74.1%, p < 0.001 in CD). Our study confirmed anemia as a frequent problem in pediatric patients with IBD. Children with more extensive and more severe disease are at higher risk to develop anemia.

30 June 2022 in Folia Medica
Verified
Journal Article
Open access
PDF file
Ivan YankovIvan Yankov
Ivan Yankov
VTVasil Tashev
Vasil Tashev
PKPavlin Kozev
Pavlin Kozev
RSRayna Shentova
Rayna Shentova
DMDanail Mitkovski
Danail Mitkovski
NBNikola Boyanov Boyanov
Nikola Boyanov Boyanov
Bezoars are accumulations in the gastrointestinal tract caused by intentional or unintentional consumption of indigestible materials. After food and mucus impaction they become solid masses with different sizes, presenting with various non-specific symptoms. Current treatment options for bezoars include enzymatic dissolution, endoscopic fragmentation and removal, and surgical removal. Herein, we report two cases with an abdominal trichobezoar due to trichophagia presenting with mild atypical symptoms and requiring surgical removal. The patients had no underlying psychological and behavioral deviations, psychiatric disorders, stressful or traumatic live events that may trigger the condition. We present our approach to making the diagnosis, the challenges we met, and our treatment strategy. Trichobezoar should not be forgotten as part of the differential diagnosis of abdominal pain and abdominal mass in children and adolescent.

27 January 2022 in Medical Principles and Practice
Verified
Journal Article
Open access
PDF file
RSRayna Shentova
Rayna Shentova
DKDenitza Kofinova
Denitza Kofinova
PHPetyo Hadzhiyski
Petyo Hadzhiyski
EIEkaterina Ivanova-Todorova
Ekaterina Ivanova-Todorova
PYPenka Yaneva
Penka Yaneva
MBMila Baycheva
Mila Baycheva
Objective: Pediatric Crohn’s disease (CD) has a more aggressive phenotype and course than in adults. Many patients develop complications that require surgery. The aim of this study was to identify the factors associated with increased risk for surgical intervention in pediatric patients with CD. Subjects and Methods: This study is a retrospective review of medical records. We analyzed the following variables: sex, age at diagnosis, presenting symptoms, duration of symptoms before diagnosis, disease location and severity, the presence of extraintestinal manifestations, and the presence of anti-Saccharomyces cerevisiae antibodies. Univariate analysis using the Mann-Whitney test and Fisher’s exact test was performed to detect the factors associated with surgery. Potential risk factors with p < 0.05 were further analyzed using a multivariate binary logistic regression model. Results: Fifty-seven patients (27 girls and 30 boys) were included in the analysis. More than one-fourth of them (28.1%) required surgical management. Female sex (p = 0.043), disease behavior (p = 0.012), and the presence of perianal disease at diagnosis (p < 0.001) were the variables associated with surgical intervention. Stricturing disease (B2) (odds ratio [OR], 24.944; p = 0.016), stricturing and penetrating disease (B2B3) (OR, 28.276; p = 0.011), and the presence of perianal disease at diagnosis (OR, 95.802; p = 0.001) were independent risk factors for surgery. Female sex was associated with surgery without being an independent risk factor. Conclusion: Females with B2 or B2B3 or the presence of perianal disease at diagnosis are at a higher risk for surgery and should be considered for more aggressive medical treatments.

1 January 2020 in Gastroenterología y Hepatología
Verified
Journal Article
Closed access
RSRayna Shentova
Rayna Shentova
MBMila Baycheva
Mila Baycheva
PHPetio Hadjiiski
Petio Hadjiiski
DKDenitza Kofinova
Denitza Kofinova
PYPenka Yaneva
Penka Yaneva

27 November 2023 in Proceedings of the Bulgarian Academy of Sciences
Verified
Journal Article
Closed access
PHPetyo Hadzhiyski
Petyo Hadzhiyski
MBMila Baycheva
Mila Baycheva
RSRayna Shentova
Rayna Shentova
DKDENITZA KOFINOVA
DENITZA KOFINOVA
RMRumyana Markovska
Rumyana Markovska
Lyudmila BoyanovaLyudmila Boyanova
Lyudmila Boyanova