Primitive myxoid mesenchymal tumor of infancy presenting with an abdominal and thoracic mass misdiagnosed as neuroblastoma: A case report.

ABSTRACT: Primitive myxoid mesenchymal tumor of infancy (PMMTI) is a rare soft tissue tumor that has been recently described in only a few cases. A 10-month-old boy was admitted with a mass filling the abdomen and right hemothorax. Gross examination revealed a fragile, and occasionally gelatinous and rubbery mass. On microscopic examination, there were fibrillary off-white appearance with occasionally myxoid microcystic areas. Immunohistochemical examination results were as follows: BCOR (+), and SATB2 (+) with diffuse nuclear expression, Desmin (-), CD34 (-), S-100 (-), MyoD1 (-), Myogenin (-). The next-generation sequencing showed internal tandem duplication of the BCOR exon 15. In conclusion, PMMTI is a distinctive entity with unique characteristics. However, it can be clinically confused with other childhood malignancies such as neuroblastoma. Recurrence can be seen despite chemotherapy in patients with microscopic residue.

Use of Video-Assisted Thoracoscopic Surgery (VATS) in the Treatment of Primary Spontaneous Pneumothorax (PSP) in Children.

INTRODUCTION: This study aims to review the primary spontaneous pneumothorax (PSP) patients we have treated and to discuss the results in terms of PSP treatment management and video-assisted thoracoscopic surgery (VATS) use in the light of the literature. METHODS: The study was designed retrospectively and conducted at a tertiary referral university hospital between January 1, 2015 and May 1, 2021. Patients under the age of 18 years with a diagnosis of pneumothorax (PTX) were included in the study. Medical records were analyzed in terms of clinical characteristics, demographic data, findings from imaging data, procedures performed, and course of the disease at hospital. Patients with no evidence of PTX on radiologic imaging (direct postero-anterior chest X-ray (PACXR) or thoracic computed tomography (TCT)), incomplete medical records for follow-up, history of trauma, and neonatal PTX were excluded from the study. RESULTS: The study was conducted on a total of 98 PTX cases in 69 patients, 61 (88.4%) males and eight (11.6%) females. The ages of the patients ranged between 13 and 17 years with a mean of 16.59 ± 0.95 years. While 48 (49%) PTX cases were treated with tube thoracostomy, 19 (19.4%) were treated with medical follow-up (nonsurgical treatment) and 31 (31.6%) were treated with VATS. A total of 31 VATS procedures were performed on 28 patients. The follow-up period after VATS ranged from tthree to 78 months, with a mean of 31.5 ± 20.3 months and a median of 28 months. CONCLUSION:  Our retrospective study showed that TCT scanning did not provide additional benefit when PSP was detected on PACXR in patients presenting with chest pain and respiratory distress. According to the findings of our study, it was thought that the probability of undergoing an invasive procedure and surgical intervention increased as the percentage of PTX detected in PACXR increased. Tube thoracostomy may be required in a patient with PSP if PTX does not start to decrease and lung expansion does not increase after an average of 60 hours after the decision for medical follow-up, and if PTX is progressive in the follow-up. VATS can be performed on a patient with PSP when lung expansion does not increase after an average of 18 hours after tube thoracostomy, when PTX progresses, when air leakage continues for more than 10 days despite increased lung expansion, and when recurrent PTX occurs.

Clinicopathologic Features and Prognostic Significance of Immunohistochemistry and In Situ Hybridization Based Molecular Classification in Gastric Carcinoma.

BACKGROUND/AIM: Gastric carcinoma (GC) is a highly heterogeneous disease with many subtypes that have different morphologic and molecular characteristics. In the current study, we analyzed immunohistochemical (IHC) and in situ hybridization (ISH) features of GCs and evaluated their association with prognosis and clinicopathological features. MATERIALS AND METHODS: Three hundred cases analyzed by IHC and ISH for microsatellite stability, p53, e-cadherin, HER2, PD-L1 expression, and Epstein-Barr virus (EBV) status. Cases were classified into five subgroups based on expression profile. The relationships between subgroups, clinicopathological features, and survival were determined. RESULTS: Ten (3.3%) cases were classified as EBV-associated, 45 (15%) as microsatellite instable (MSI), 73 (24.3%) as EBV-/microsatellite-stable (MSS)/epithelial-mesenchymal-transformation (EMT)-like, 75 (25%) as EBV-/MSS/ non-EMT-like/p53+, and 97 (32.3%) as EBV-/MSS/non-EMT-like/p53-. The MSI subtype had the best overall survival (OS). In contrast, the EBV-/MSS/EMT-like subtype had the poorest OS. The MSI subtype was also related with old age of the patient and antrum-corpus localized tumors, whereas the EBV-/MSS/EMT-like was associated with young age, larger tumor size, and advanced stage presentation. PD-L1 positivity is highly correlated with MSI and EBV-associated subtypes. CONCLUSION: Our data demonstrated a link between IHC/ISH characteristics of GC and clinical outcomes. IHC/ISH based molecular classification may be helpful in predicting the survival.

The role of IL-6, thiol-disulfide homeostasis, and inflammatory biomarkers in the prediction of acute appendicitis in children: a controlled study.

PURPOSE: This study aimed to examine the diagnostic value of IL-6, thiol-disulfide homeostasis, complete blood count and inflammatory biomarkers in the prediction of acute appendicitis in children. METHODS: The study was designed as a prospective and controlled study in children-the study was conducted at a tertiary referential university hospital between May 2020 and April 2021. Patients were divided between study groups and one control group (CG): 1: confirmed acute appendicitis group (AAP); 2: perforated appendicitis group (PAP); and 3: non-specified abdominal pain (NAP). The age and gender of the patients were determined. The following listed laboratory parameters were compared between groups: TOS: total oxidative status, TAS: total antioxidant status, OSI: oxidative stress index, TT: total thiol, NT (µmol/L): native thiol, DIS: disulfide, IL-6: interleukin 6, TNF-a: tumor necrosis factor-alpha, WBC: white blood cell, NEU: neutrophil, NEU%: neutrophil percentage, LY: lymphocyte, LY%: lymphocyte percentage, PLT: platelet, MPV: mean platelet volume NLR: neutrophil lymphocyte ratio, CRP: C-reactive protein, LCR: lymphocyte CRP ratio, and serum lactate. RESULTS: The TOS level of the PAP group was found to be significantly higher than that in the AAP, NAP and control groups (p = 0.006, < 0.001 and p < 0.001). TAS, TT, and NT levels in the PAP group were significantly lower than those in the AAP, NAP and control groups. OSI was significantly higher in the PAP group than in the other groups. The TT and NT levels of the NAP group were both similar to those of the control group. Serum DIS level was similar between the AAP and PAP groups, AAP and NAP groups, and NAP and control groups. Serum IL-6 and TNF-α levels were found to be significantly higher in the PAP group compared to those in all groups. The WBC, NEU, and NEU% values were found to be significantly higher in the PAP group than those in the NAP and control groups, while LY and LY% values were found to be significantly lower. PAP and AAP groups were found to be similar in terms of WBC, NEU, LYM, NEU%, and LYM% values. PLT and MPV values and serum lactate values did not show a significant difference between the groups. NLR was similar in the AAP and PAP groups. A significant increase in CRP versus a decrease in LCR was detected in the PAP group compared to that in the AAP group. Multivariate analysis demonstrated that only IL-6 has significant estimated accuracy rates as 80% for the control group, 78.8% for AAP, 96.9% for PAP, and 81.6% for NAP. CONCLUSION: Rather than AAP, PAP caused significantly higher oxidative stress (increased TOS and OSI), and lower antioxidation capacity (decreased TT and NT). IL-6 levels can provide a significant stratification. Nevertheless, simply detecting WBC or CRP is not enough to distinguish the specific pathology in acute appendicitis and related conditions.

Effect of ceftriaxone on intestinal transit time.

Ceftriaxone reduces gallbladder and ileal contractility. Many studies have shown that ceftriaxone causes biliary sludge and pseudolithiasis. However, its effect on intestinal transit time has not been investigated. This study aimed to investigate the effect of ceftriaxone on intestinal transit time. Sixteen rats were examined in two groups: The study group (group A, n = 8) was administered with 100 mg/kg ceftriaxone intramuscularly for 7 days. The control group (group B, n = 8) was administered with intramuscular distilled water for 7 days. On the seventh day, a mixture of 2 ml barium and saline was given orally to both groups. Barium transit was evaluated using serial digital X-ray images. The stomach was full and the transition into the small intestine loop was observed in all rats at 45 min in both groups. At the 2nd hour, colonic transition was observed in two rats in group A (2/8, 25%) and in seven rats in group B (7/8, 87.5%). At the 4th hour, five (62.5%) rats in group A had transverse colonic transition, and all rats in group B (8/8, 100%) had transverse and/or left colonic transition. At the 6th hour, no rat in group A had rectal transition, and all rats in group B (8/8, 100%) had complete passage of colonic contrast material. Ceftriaxone significantly prolongs the small intestine transit time, large intestine transit time, and total intestinal transit times.

What has changed in children's appendicitis during the COVID-19 pandemic?

BACKGROUND: The present study aimed to investigate the changes in the course of acute appendicitis during the pandemic period by comparing the cases treated during the coronavirus disease 2019 (COVID-19) pandemic with those in the pre-pandemic period. METHODS: The study was conducted with 601 children aged 1-18 years who were operated for acute appendicitis between May 1, 2019, and February 29, 2020 (Group I) and between March 1 and December 31, 2020 (Group II). The demographic and disease characteristics as well as the treatment processes were compared between the groups. RESULTS: It was found that 59.1% (n=355) of the cases included in the study were in Group I and 40.9% (n=246) were in Group II. During the pandemic period; due to the concerns of families about contracting a contagious disease for both themselves and their children, and warnings by health professionals and government officials that they should not leave their homes and not come to the hospital unless there is an emergency, the time to apply to the hospital has been extended. Before the pandemic, 20.3% of the patients presented to the hospital on the 1st day of their complaints, where during the pandemic, only 2% of the patients reported to the hospital on the 1st day, and 15% presented after 4 days or more. As a result, the rate of perforated appendicitis, which was formerly 10.4%, increased to 24.8% during the pandemic period (p<0.01). During the pandemic, we operated on four patients with positive COVID-19 test results. There were no complications related to COVID-19 and surgery in our patients. CONCLUSION: Concern of the current pandemic resulted in late presentation to the hospital, increase in the number of perforated appendicitis, and prolonged hospital stay.

Duplex Kidney Anomalies and Associated Pathologies in Children: A Single-Center Retrospective Review.

INTRODUCTION: Duplex renal collecting systems are one of the most common congenital anomalies of the urinary tract. The exact prevalence of this anomaly is difficult to ascertain because most patients are asymptomatic, and the abnormality is frequently detected incidentally. The aim of this study is to retrospectively review the demographic characteristics and different clinical presentations, related pathology, and treatment methods of patients with duplex system anomaly who applied to our institution, with a literature review. METHODS: This is a retrospective study, performed at the Department of Pediatric Urology and Pediatric Surgery, Umraniye Training and Research Hospital, a tertiary center, from 2010 to 2021. Age, gender, presenting symptoms, and associated anomalies were determined in all patients. Asymptomatic patients with variants of duplex kidney anomaly detected incidentally did not require any surgical intervention. Necessary surgical interventions were performed depending on the pathologies of other symptomatic patients associated with duplex kidney anomaly variants. RESULTS: A total of 239 patients had duplex systems. The patients were divided into two groups according to their age, 0-24 months (newborn and infant) and over 24 months. There were 45 (18.8%) patients in the 1st group and 194 (81.1%) patients in the 2nd group. It was seen that the most common symptom in 85 (35.6%) patients was urinary tract infection (UTI). It was observed that 5 (2%) patients had no symptoms and were detected during routine screening. When comorbidities detected with the duplex system were examined, the most common ones were antenatal hydronephrosis 23 (9.6%). Ureterocele excision was performed in ten patients, laparoscopic heminephrectomy was performed in six patients, and ureteroneocystostomy was performed in one patient. CONCLUSIONS: It is important that magnetic resonance urography (MRU) duplex renal collecting systems, which is a current imaging method used in the evaluation of the duplex system, provide detailed information about the morphology and function and are useful in the evaluation of associated anomalies. Diagnosis and treatment before it becomes symptomatic or results in further kidney damage are important for the preservation of renal function in advanced follow-ups.

Gastrointestinal perforations and associated risk factors in children after liver transplantation.

In this study, possible risk factors of gastrointestinal perforations (GIP) that increase mortality after liver transplantation in children were investigated. One hundred and thirty-one pediatric patients who underwent 139 liver transplants between January 2016 and February 2020 were evaluated retrospectively based on preoperative and surgical data. Furthermore, cases with biliary atresia, which constitute 26.7% (35) of the patients, were compared within themselves and with other groups. It was found that the cases that developed perforations were younger, lower in weight, and had higher number of surgeries than those who did not, while the mortality and morbidity rates were higher in these patients. When cases with biliary atresia were analyzed within themselves, no significant difference was found between perforated biliary atresia and non-perforated cases in terms of age, weight, and previous surgery. When biliary atresia and other etiologies were compared, biliary atresia cases were found to be transplanted at a younger age, at a lower weight, and this group had a higher risk for perforation. Early laparotomy should be performed in order to reduce mortality in GIPs. Patients that are younger, underweight, previously operated, and using mesh must be closely monitored.