Oversewing the Staple Line: Does It Safe to Prevent Leakage?

Introduction: The staple line (SL) leak remains one of the most serious complications after laparoscopic sleeve gastrectomy (LSG). The present study aims to determine whether reinforcing the SL with sutures is effective in maintaining tissue integrity. Materials and Methods: LSG Specimens of 60 patients were ex vivo studied. The specimens were divided into three groups: In group 1, the entire SL was reinforced, while the upper half part of the SL was reinforced from fundus to antrum in group 2. The SL was not reinforced in group 3. Then, the pressure inside the sample was increased, and the bursting pressure location and pressure value during the bursting were recorded. Results: The bursting pressure was significantly higher in entire and half oversewed SL groups than the none reinforced group (group 1: 115 mmHg [95-170]; group 2: 95 mmHg [80-120]; group 3: 40 mmHg [22-60], respectively, [P < .001]). The most common site of bursting was in the middle ⅓ of SL (35, 53.8%), followed by the proximal ⅓ part of SL (18, 27.7%), and the distal ⅓ part of SL (12, 18.5%), respectively. The bursting site was significantly more frequent in the corpus than the other parts of the SL (P = .013). Conclusion: Reinforcing the SL with sutures preserves tissue integrity. Although bursting was most frequently observed in the corpus region ex vivo, the fact that almost all real-life leaks develop in the area close to the Angle of His. This situation suggests that strengthening the suture line with reinforcement alone will not be protective enough against leaks in the fundus line, and factors such as tissue ischemia may be considered.

Higher Levels of Galectin-1 and Galectin-3 in Young Subjects with Autism Spectrum Disorder Compared to Unaffected Siblings and Healthy Controls.

Objective: : Despite being highly genetic, the etiology of autism spectrum disorder (ASD), has not yet been clarified. Recent research has focused on the role of neuroinflammation and immune system dysfunction in the pathophysiology of neurodevelopmental disorders including ASD. Galectin-1 and galactin-3 are considered among the biomarkers of neuroinflammation and there has been recent reports on the potential role of galectins in the etiology of neurodevelopmental disorders. However, there has been no study examining the relationship between ASD and galectin levels. Methods: : Current study aimed to investigate galectin-1 and galectin-3 serum levels in young subjects with ASD comparing with their unaffected siblings and healthy controls. Results: : We found significantly higher levels of galectin-1 in case group compared to both unaffected siblings and healthy controls, and higher levels of galectin-3 in case group compared to healthy controls. However, there was no significant association between galectin-1 and galectin-3 levels with the severity of ASD. Conclusion: : Findings of our study may support neuroinflammation hypothesis in the etiology of ASD and the potential role of galectin-1 and galectin-3 as biomarkers.

VEGF, IGF-1 and FGF-2 Serum Levels in Children and Adolescents with Autism Spectrum Disorder with and without Bipolar Disorder.

PURPOSE: To investigate serum levels of VEGF, IGF-1 and FGF-2, and relationships with several clinical characteristics in children and adolescents with autism spectrum disorder (ASD) with and without bipolar disorder (BD). METHOD: 40 subjects with ASD + BD as study group, and 40 subjects with ASD as control group were included. Serum levels of VEGF, IGF-1, and FGF-2 were measured using commercial enzyme-linked immunosorbent assay kits. RESULTS: The study group was significantly higher than the control group in terms of ASD severity, self-harming behavior and sleep disturbance. Serum VEGF and FGF-2 levels were significantly higher in the ASD + BD group than in the control group. There was no significant difference in serum IGF-1 levels between the two groups. There was no correlation between VEGF, IGF-1 and FGF-2 serum levels and ASD severity in the study group. However there was a negative correlation between VEGF levels and age at first diagnosis of BD, and a positive correlation between IGF-1 levels and the number of bipolar episodes in the study group. CONCLUSION: Growth factors like VEGF and FGF-2 may be potential biomarkers of bipolar disorder in young subjects with ASD. Given the difficulty of clinical management of BD in young subjects with ASD, potential biomarkers would help clinicians in the diagnosis and follow up of BD in this special population. Further research is needed whether VEGF and FGF-2 can be potential biomarkers in the clinical management of young subjects with ASD and BD.

Peripheral Expression of ADORA2A Is Increased and Is Correlated with Autism Spectrum Disorder Severity in a Sample of Turkish Children.

Background: The aim of this study was to evaluate the peripheral expression of ADORA2A (Adenosine A2A receptor gene) in young subjects with autism spectrum disorder compared with healthy controls and its relationship with clinical characteristics. Method: This study included 93 children and adolescents with a diagnosis of autism spectrum disorder as the study group and 105 healthy age- and gender-matched controls. Blood samples were obtained from all participants, and a real-time quantitative polymerase chain reaction was performed. Parent- and clinician-rated assessment instruments were used to assess and rate the severity of autism spectrum disorder and other emotional/behavioral problems. Results: The mean age of the study group was 9.06 ± 3.57 and 86% were male (n = 83), whereas the mean age of the control group was 9.22 ± 3.86 and 86.7% were male (n = 91). We have found a higher level of peripheral expression of ADORA2A in children and adolescents with autism spectrum disorder compared with healthy controls (fold change = 1.33, P = .001). We also found a weak negative correlation with autism spectrum disorder severity (r = -0.216; P = .038) and stereotyped behaviors (r = -0.207, P = .046). Conclusion: ADORA2A genes may have a role in the pathophysiology of autism spectrum disorder. Further studies are needed to evaluate whether peripheral expression of ADORA2A genes may be among the biomarkers for diagnosing or measuring the severity of autism spectrum disorder.

Serum Zonulin and Claudin-5 but not Interferon-Gamma and Interleukin-17A Levels Increased in Children with Specific Learning Disorder: A Case-Control Study.

Background: Gut-blood and blood-brain barrier permeabilty (gut-brain axis) has been attracting increased attention in the etiology of neurodevelopmental disorders. In this study, we aimed to investigate serum levels of zonulin (a biomarker of intestinal permeability), claudin-5 (a biomarker of blood-brain barrier permeability), and interferon-gamma and interleukin-17A in children with specific learning disorder. Methods: Forty-three children with DSM-5 diagnosis of specific learning disorder and 43 healthy children were included in this study. Serum levels of zonulin, claudin-5, interferon-gamma, and interleukin-17A were measured using commercial enzyme-linked immunosorbent assay kits. Results: Serum zonulin and claudin-5 levels of the study group were significantly higher than the control group according to the multivariate analysis of covariance test while controlling for age, gender, and body mass index. However, serum interferon-gamma and interleukin-17A levels were not significantly different between the two groups. There was no correlation either between zonulin and interferon-gamma and interleukin-17A or claudin-5 and interferon-gamma and interleukin-17A. Conclusion: Gut-blood and blood-brain barrier permeability may be disrupted in subjects with special learning disorder. Further research is needed to determine whether zonulin and claudin-5 may be biomarkers, and some dietary interventions or specific agents such as zonulin or claudin-5 inhibitors could be used in the management of neurodevelopmental disorders including special learning disorder.

Comparison of scoring systems regarding the gender as a parameter with the traditional scoring systems for predicting appendicitis.

Although acute appendicitis remains the most common cause of acute abdomen in General Surgery practice, negative appendectomy rates are still high in particularly female patients. Appendicitis scoring systems considering gender can help the clinician to reduce negative appendectomy rates in females. This present study aims to compare the Lintula, Ripasa, Fenyo-Lindberg scoring systems, which use gender as a variable, with the Alvarado, Karaman, scoring systems to evaluate which CSS is more successful in the differential diagnosis of appendicitis in females. We analyzed the records of the patients operated on with a prediagnosis of acute appendicitis in our clinic between 2020 and 2021, retrospectively. Alvarado, adult appendicitis score (AAS), appendicitis inflammatory response score (AIRS), Ripasa, Karaman, Lintula, and Fenyo Lindberg scores were calculated for each patient. The patients were divided into two groups as male and female, according to gender. Receiver operator characteristic (ROC) curve analysis was used to identify the best cut-off value and assess the performance of the test score for appendicitis. Three hundred and sixty-three patients were included in the study. One hundred seventy-two (47.4%) of the patients were male, and 191 (52.6%) were female. Alvarado and AAS were the most valuable score in female (AUC: 0.805, sensitivity: 0.63, specificity: 0.83; and area under curve (AUC): 0.794, Sensitivity 0.71, Specificity: 0.76, respectively), male group (AUC: 0.828, Sensitivity: 0.71, Specificity: 0.83; and AUC: 0.834, Sensitivity 0.74, Specificity: 0.77, respectively), and when patients were not categorized by gender (AUC: 0.818, Sensitivity: 0.67 Specificity: 0.83; and AUC: 0.794, Sensitivity 0.71, Specificity: 0.76, respectively). Although the Alvarado scoring system is the first defined appendicitis scoring system, it seems as superior to the many scoring systems defined after it in predicting appendicitis, even in female patients.

Effect of Impairment on the Prevalence and Comorbidities of Attention Deficit Hyperactivity Disorder in a National Survey: Nation-Wide Prevalence and Comorbidities of ADHD.

OBJECTIVE: This study aimed to determine the prevalence and comorbidities of attention-deficit hyperactivity disorder (ADHD) by evaluating a large-scale nation-wide sample of children. METHOD: The inclusion criterion was being enrolled as a 2nd, 3rd, or 4th-grade student. A semi-structured diagnostic interview (K-SADS-PL), DSM-IV-Based Screening Scale for Disruptive Behavior Disorders, and assessment of impairment (by both parents and teachers) were applied to 5,842 participants. RESULTS: The prevalence of ADHD was 19.5% without impairment and 12.4% with impairment. Both ADHD with and without impairment groups had similar psychiatric comorbidity rates except for oppositional defiant disorder (ODD) and conduct disorder (CD) diagnoses. Impairment in the ADHD group resulted in significantly higher ODD and CD diagnoses. CONCLUSION: Even when impairment is not described, other psychiatric disorders accompany the diagnosis of ADHD and may cause impairment in the future. Impairment in the diagnosis of ADHD significantly increases the likelihood of ODD and CD.

Laparoscopic Surgery for Adult Intussusception: Case Series.

BACKGROUND/AIMS: Intussusception is a rare condition in adults which accounts for 1% of all intestinal obstructions. It usually requires surgical treatment and the classic approach is laparotomy. This article presented six adult patients who underwent laparoscopic surgery for intestinal obstruction due to intussusception. MATERIALS AND METHODS: Between January 2017 and July 2019, six adult patients underwent laparoscopic surgery for intestinal obstruction due to intussusception. The patients were evaluated in terms of presenting symptoms, diagnosis, treatment modality, morbidity, mortality and histopathological results. RESULTS: All patients presented with acute (50%) or subacute (50%) symptoms. All patients had intestinal obstruction (partial, complete) findings. Intussusception was diagnosed by abdominal computed tomography (CT). The patients with ileocolic and colo-colonic intussusception underwent colonoscopy. In the preoperative period, the etiology of intussusception (neoplasm, idiopathic, etc.) was diagnosed only in one patient (16.6%). Two patients underwent laparoscopic segmental small bowel resection, two patients underwent laparoscopic right hemicolectomy, one patient underwent laparoscopic left hemicolectomy, and one patient underwent laparoscopic anterior resection. None of the patients developed intraoperative or postoperative complication. The histopathological examination revealed malignancy in two patients (33.3%). CONCLUSION: CT is helpful in diagnosing of adult intussusception. However, it is usually difficult to define the underlying pathology with CT. Laparoscopic approach seems to be safe and effective as open surgery, both in diagnosis and treatment of intussusception.

Comparison of open and laparoscopic gastrectomy for gastric cancer: a low volume center experience.

OBJECTIVES: In gastric cancer, laparoscopic gastrectomy is commonly performed in Asian countries. In other regions where tumor incidence is relatively low and patient characteristics are different, developments in this issue have been limited. In this study, we aimed to compare the early results for patients who underwent open or laparoscopic gastrectomy for gastric cancer in a low volume center. MATERIAL AND METHODS: We retrospectively analyzed the data of patients who underwent curative gastric resection (open gastrectomy n: 30; laparoscopic gastrectomy n: 30) by the same surgical team between 2014 and 2019. RESULTS: The tumor was localized in 60% (36/60) of the patients in the proximal and middle 1/3 stomach. In laparoscopic gastrectomy group, the operation time was significantly longer (median, 297.5 vs 180 minutes; p <0.05). In open gastrectomy group, intraoperative blood loss (median 50 vs 150 ml; p <0.05) was significantly higher. Tumor negative surgical margin was achieved in all cases. Although the mean number of lymph nodes harvested in laparoscopic gastrectomy group was higher than the open surgery group, the difference was not statistically significant (28.2 ± 11.48 vs 25.8 ± 9.78, respectively; p= 0.394). The rate of major complications (Clavien-Dindo ≥ grade 3) was less common in the laparoscopic group (6.7% vs 16.7%; p= 0.642). Mortality was observed in four patients (2 patients open, 2 patients laparoscopic). CONCLUSION: In low-volume centers with advanced laparoscopic surgery experience, laparoscopic gastrectomy for gastric cancer can be performed with the risk of morbidity-mortality similar to open gastrectomy.

Lifetime depressive and current social anxiety are associated with problematic internet use in adolescents with ADHD: a cross-sectional study.

AIM: To evaluate the relationships between problematic internet use (PIU) and psychiatric comorbid disorders and internet use habits in a clinical sample of adolescents with attention-deficit/hyperactivity disorder (ADHD). METHOD: This cross-sectional study included 95 adolescents with ADHD. Problematic behaviors and symptoms related to internet use were evaluated via Young's Internet Addiction Scale (YIAS), and subjects with a YIAS score of ≥50 were categorized as PIU while those with a score of <50 were defined as normal internet use (NIU). The two groups were compared with respect to demographics and psychometric tests. While psychiatric disorders were examined by a semistructured instrument, self-report and parent-report scales were used to assess other individual and clinical characteristics of participants. RESULTS: 33.7% (n = 32) of the participants were determined to have PIU. There was no gender (p = .058) or age (p = .426) difference between the PIU and NIU groups. Current presence of social phobia (p = .035) and history of major depressive disorder (p = .006) were more frequent in the PIU group than the NIU group. Multivariable regression analysis revealed that PIU was independently associated with online gaming (OR: 2.375, 95% CI: 1.532-3.681), e-mail use (OR: 1.864, 95% CI: 1.170-2.971), social networking (OR: 1.834, 95% CI: 1.156-2.910), and Social Phobia Scale for Children and Adolescents (SPSCA) score (OR: 1.058, 95% CI: 1.020-1.098). CONCLUSION: PIU may be common among adolescents with ADHD. The severity of social phobia and particular online activities (playing online games, e-mailing, social networking) may be associated with a higher risk of PIU in adolescents with ADHD.

Caring for the Most Vulnerable: A Model for Managing Maladaptive Behavior in Children with Mental Special Needs During the COVID-19 Pandemic.

Background: This article presents the results of a comprehensive national model developed for managing maladaptive behaviors (MBs) in children with mental special needs (CMSNs) during the coronavirus disease 2019 (COVID-19) pandemic that combines telehealth-based Applied Behavioral Analyses, psychiatric interventions, and support from local psychosocial teams. This study aims to determine the effectiveness of a system that combined telehealth applications with local psychosocial support teams, allowing services from video calls to emergency interventions. Materials and Methods: The system combines the telehealth applications with the services from local psychosocial intervention teams. In addition to system records covering sociodemographic variables and initial complaints, a telephone survey questioning the effectiveness and satisfaction of the system was used as the main outcome. Results: In total, 347 individuals used the system with mothers constituting the majority of applicants (88.7%, n = 332). The overall satisfaction of the system was 8.8/10. In terms of effectiveness, 63.3% (n = 237) of caregivers reported an improvement in the reason of application. Counselors decided on a need for follow-up visits for 36.6% (n = 137) of applications. A referral to a psychiatrist was asked for 40 patients (10.6%). Discussion: To our best knowledge, this is the first study presenting a model for managing MBs of CMSNs during the COVID-19 outbreak. In general, therefore, it seems that there is a need for unique systems to handle behavioral problems of CMSNs. Conclusions: The findings of this study suggest that it is possible to establish an integrative multistep multidisciplinary telehealth-based approach in a short while.

Peripheral Expression of MACROD2 Gene Is Reduced Among a Sample of Turkish Children with Autism Spectrum Disorder.

Background: Genomic variations in mono-ADP ribosylhydrolase 2 (MACROD2) have been associated with autism spectrum disorder (ASD) in recent genome-wide studies and case reports. In this study, we aimed to evaluate the MACROD2 expression profile in patients with ASD. Methods: The study group included 100 children with a DSM-5 diagnosis of ASD, and the control group consisted of 105 healthy controls. Blood samples were obtained from all participants in this study, and the gene expression level was determined using quantitative reverse transcription PCR (RT-qPCR). Statistical analysis was performed with R 3.4.0 and Statistical Program for Social Sciences (SPSS for Windows, 21.0). Results: The mean ages of the participants in the study and control groups were 9.22 ± 3.62 and 9.27 ± 3.86 years, respectively. There was no significant difference concerning gender (P = .944) and age (P = .914) between the 2 groups. MACROD2 gene expression was found to be decreased in the study group compared to the control group (study group = 5.73, control group = 89.56; fold change =-3.967; P < .001). While the level of MACROD2 expression was not correlated with the ASD severity, it was associated with the severity of the hyperactivity/impulsivity symptoms (P = .008). Conclusions: This is the first study in the literature investigating the peripheral expression of the MACROD2 gene. We showed that the expression level of MACROD2 was decreased in patients with ASD when compared to the control group. As the relationship between the MACROD2 gene expression profile and ASD remains to be further investigated, this study may provide an insight for further studies.

The role of extended antral resection on weight loss and metabolic response after sleeve gastrectomy: A retrospective cohort study.

OBJECTIVE: The impact of extended antral resection (AR) after laparoscopic sleeve gastrectomy (LSG) on clinical results is still not clearly elucidated with conflicting results. Our study aimed to determine whether AR is superior to antral preservation (AP) regarding clinical results. METHODS: Patients were divided into two groups according to the distance of gastric division as AR group (2cm from pylorus) and AP group (6cm from pylorus). Postoperative excess weight loss percentile (%EWL) and total body weight loss percentiles (%TBWL) at the end of first, 6th and 12 months were compared. Secondly, metabolic parameters and complications were compared. RESULTS: The first 68 patients underwent AP, and the following 43 patients underwent AR. Although statistically not significant, AR achieve more %EWL and %TBWL at the end of the first year, (P>0.05). On the other hand, metabolic parameters were similar at the end of the first year, (P>0.05). Resolution of comorbidities were statistically not different, (P>0.05). Staple line leak occurred in two patients of the AR group (4.7%) and two patients of the AP group (2.9%), (P>0.05). CONCLUSION: Both AR and AP seem to be equally effective in resolution of metabolic response. Although statistically not significant- AR provided more %EWL and %TBWL at the end of 12 months.

Exacerbation of obsessive compulsive disorder symptoms in children and adolescents during COVID-19 pandemic.

OBJECTIVE: To investigate the effects of COVID-19 pandemic and related home confinement on symptom profile, symptom severity and exacerbation of obsessive compulsive disorder (OCD) symptoms and related factors among young subjects with OCD. METHOD: Young subjects who have been followed up with a primary diagnosis of OCD in a university hospital were reached by telephone or online programs to assess symptom profile, symptom severity and exacerbation during pandemic. Children's Yale-Brown Obsessive Compulsive (CY-BOCS) and Clinical Global Impression- Severity (CGI-S) Scales were used to rate symptom profile and severity before pandemic and during pandemic periods. RESULTS: There was a significant increase in the frequency of contamination obsessions (p=0.008) and cleaning/washing compulsions (p=0.039) during pandemic period. CY-BOCS obsessions (p<0.001), compulsions subscales (p<0.001) and total scores (p<0.001), and CGI-S scores (p<0.001) during pandemic period were statistically higher than before pandemic period. There was a significant relationship between the change in CY-BOCS scores with talking/searching in the social environment about COVID-19, daily preoccupation about COVID-19, duration of OCD diagnosis and diagnosis of COVID-19 in someone familiar. CONCLUSIONS: Young subjects with OCD may develop additional symptoms and worsen already existing symptoms of OCD during COVID-19 pandemic.

Gynecomastia: A Rare Adverse Effect of Methylphenidate in an Adolescent Boy.

Gynecomastia is a benign condition developing in association with localized fat deposition and glandular tissue proliferation in the breast in males, and characterized by breast growth. Drug is one of the most important factors in the etiology of gynecomastia. Methylphenidate is a commonly preferred and well-tolerated drug in the treatment of attention deficit hyperactivity disorder in children and adolescents. Gynecomastia is an uncommon side-effect of methylphenidate use. We report a case of bilateral gynecomastia developing in a dose-dependent manner during methylphenidate monotherapy and resolving with discontinuation of medication in a 15-year-old patient with a history of a similar side-effect during previous use of the drug. To the best of our knowledge this is one of the few case reports of gynecomastia developing in association with methylphenidate.

Internet Use Habits, Parental Control and Psychiatric Comorbidity in Young Subjects with Asperger Syndrome.

We aimed to investigate the characteristics of internet use in a clinical sample of 60 young subjects with Asperger Syndrome (AS) and its relationship with parental control and psychiatric comorbidity. Of the participants, 38.3% were classified as having problematic internet use (PIU). Subjects with normal internet use (NIU), compared to the subjects with PIU, had significantly higher scores on parental control scale. While there was no significant difference in terms of any comorbid diagnoses between subjects with NIU versus PIU, severity of depressive symptoms was found to predict higher scores on Young Internet Addiction Scale (YIAS). In conclusion, PIU may be common in AS and may be associated with internalizing problems, while parental control may protect against it.

Efficacy and Safety of Electroconvulsive Therapy in Adolescents: A Retrospective Chart Review Study From Turkey.

OBJECTIVE: The aim of this study was to report the efficacy and safety of electroconvulsive therapy (ECT) in manic, depressed, psychotic, and catatonic adolescent patients. METHODS: Medical records of 78 adolescents who had received ECT in Department of Psychiatry, Gaziantep University Medical Faculty, during 2011 to 2017 were reviewed. Sixty-two subjects in this sample were identified to have complete records and met the study inclusion criteria. RESULTS: The mean ± SD age of subjects was 17.11 ± 1.04 years and female sex was 53.2% (n = 33). Primary the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision or the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition diagnoses were bipolar mood disorders (n = 33, 53.2%), major depressive disorder (n = 16, 25.8%), schizophrenia (n = 8, 12.9%), and schizoaffective disorders (n = 5, 8.1%). Electroconvulsive therapy was significantly effective in treating manic, depressive, psychotic, and catatonia symptoms as evidenced by significant differences in pretreatment and posttreatment scores in outcome measures including Hamilton Depression Rating Scale, Young Mania Rating Scale, Positive and Negative Syndrome Scale, and Clinical Global Impression-Severity Scale (P < 0.001). Presence of comorbidity adversely affected treatment response (P = 0.001). However, ECT was also effective in those with comorbid diagnoses (P < 0.001). Depressive symptoms in patients with bipolar depression responded better than those with unipolar depression (P = 0.012). Electroconvulsive therapy was generally safe with subjective memory complaints (85%), headache (69%), and prolonged seizure (8%) as the reported adverse effects possibly related to ECT. Four subjects (6%) developed a manic switch during ECT. CONCLUSIONS: Electroconvulsive therapy is an effective and a safe treatment option in adolescent patients with severe and resistant psychopathology. Although comorbidity may decrease treatment response, ECT seems to be effective even in the presence of multiple psychiatric diagnoses.

The effect of immunonutrition on bacterial translocation after Pringle maneuverer in rats.

INTRODUCTION: Temporary clamping of the hepatoduodenal ligament (the Pringle manoeuvre) is the most commonly used method to prevent intraoperative blood loss in liver surgery. Some side effects of the Pringle manoeuvre (PM) can occur. AIM: To investigate the effectiveness of preoperative immunonutritional support to prevent bacterial translocation (BT) in rats due to PM. MATERIAL AND METHODS: Forty Wistar albino rats were randomly divided into four groups. Groups 1 and 2 were fed with normal rat diet and water, and groups 3 and 4 were fed with enteral immunonutrition (Impact Glutamine) containing 1 g/kg/day amino acid in the preoperative period. Group 1 (n = 10) and 4 (n = 10) rats were treated only with laparotomy; group 2 (n = 10) and 3 (n = 10) rats were treated with PM for 30 min with laparotomy. After 30 min, relaparotomy was applied to all groups and portal blood, mesentery, spleen samples were taken for culture purposes. RESULTS: Proliferation in portal blood cultures was significantly higher in the samples from the normally fed group (group 2) in whom PM was applied, compared to the other groups (p < 0.001). No proliferation was observed in the PM-treated group (group 3), who also received preoperative immunonutritional support. CONCLUSIONS: Preoperative immunonutritional support is effective in the prevention of BT due to PM in rats.