Trichobezoar Found Accidently while Diagnosing Resistance to Thyroid Hormone

Introduction

Bezoars are masses of indigestible foreign material in the gastrointestinal tract, usually in the stomach. These materials could be indigestible fruits, hair, milk products, or tablets. In children, the most common type of bezoar is trichobezoar (formed from hair).

Case Presentation

We describe a female patient who has been complaining about deterioration of mood, collapse without losing consciousness, scotomas, and cardiac arrhythmia for 2 years. Based on the results of thyroid hormone, resistance to thyroid hormone (RTH) was suspected. Physical examination during hospitalization revealed a palpable upper abdominal mass. Several diagnostic examinations were performed. The abdominal ultrasound showed acoustic shadowing caused by a pathological structure in the upper abdomen. Therefore, the contrast X-ray of the digestive tract revealed a deficit of contrast with an irregular shape in the stomach body and the pylorus region. Due to these results, a gastroscopy was performed, which revealed a large trichobezoar of the stomach. The trichobezoar was surgically removed without complications.

Conclusion

The case presented shows that these nonspecific symptoms and laboratory test suggesting RTH require multi-path diagnostics and the cooperation of many specialists, ultimately giving a surprising diagnosis. It is crucial to interpret diagnostic examinations with regard to the patient's physical condition. Diagnosis of trichobezoar requires a detailed search of causes to avoid another incident.

Deep and extensive pediatric burns: retrospective evaluation of scheme of patients at the Department of Children’s Developmental Defects Surgery and Traumatology SUM

<b> Introduction:</b> Burns are one of the most common injuries among children. Despite the scale of the problem, there is no generally accepted algorithm for dealing with burn wounds in children in Poland. </br></br> <b>Aim:</b> The aim of our study was to evaluate our treatment scheme as well as the long-term effects of burn treatment in our department. </br></br> <b>Material and methods:</b> We conducted a telephone survey with the parents of patients treated at our ward in 01.01.2016–01.01.2021 due to thermal burns. To assess the cosmetic effect of treatment, the modified Vancouver Scar Scale (mVSS) was used, as well as the evaluation of parents’ satisfaction with the treatment of patients on a scale from 1 to 10. Criteria to be included were the thermal burn of the skin to at least a 2b degree and/or burns with not less than 8% of the Total Body Surface Area (TBSA), as well as answering all the questions included in the questionnaire. The inclusion criteria were met by 38 out of 97 hospitalized patients. </br></br> <b>Results:</b> 26.32% of patients achieved 0 points on the mVSS, 21.05% achieved 1 point, 15.79% achieved 2 points, 15.79% achieved 3 points, 2.63% patients received 4 points, 5.26% patients received 5 points, 5.26% patients received 7 points, 2.63% patients received 8 points, 2.63% patients received 9 points, 2.63% of patients received 10 points, none of the patients received 6 and 11 points higher. 3% of parents rated their satisfaction at 5 points, 3% of caretakers as 7 points, 8% as 8 points, 8% as 9 points, and 89% as 10 points. </br></br> <b>Discussion:</b> Our treatment algorithm brings good therapeutic effects and is also very well received by the patients' parents. In order to carry out a nationwide standardization of the treatment of childhood burn wounds, it would be necessary to conduct a similarly constructed study in a multicenter setting.

Mortality from gastrointestinal congenital anomalies at 264 hospitals in 74 low-income, middle-income, and high-income countries: a multicentre, international, prospective cohort study

BACKGROUND

Congenital anomalies are the fifth leading cause of mortality in children younger than 5 years globally. Many gastrointestinal congenital anomalies are fatal without timely access to neonatal surgical care, but few studies have been done on these conditions in low-income and middle-income countries (LMICs). We compared outcomes of the seven most common gastrointestinal congenital anomalies in low-income, middle-income, and high-income countries globally, and identified factors associated with mortality.

METHODS

We did a multicentre, international prospective cohort study of patients younger than 16 years, presenting to hospital for the first time with oesophageal atresia, congenital diaphragmatic hernia, intestinal atresia, gastroschisis, exomphalos, anorectal malformation, and Hirschsprung's disease. Recruitment was of consecutive patients for a minimum of 1 month between October, 2018, and April, 2019. We collected data on patient demographics, clinical status, interventions, and outcomes using the REDCap platform. Patients were followed up for 30 days after primary intervention, or 30 days after admission if they did not receive an intervention. The primary outcome was all-cause, in-hospital mortality for all conditions combined and each condition individually, stratified by country income status. We did a complete case analysis.

FINDINGS

We included 3849 patients with 3975 study conditions (560 with oesophageal atresia, 448 with congenital diaphragmatic hernia, 681 with intestinal atresia, 453 with gastroschisis, 325 with exomphalos, 991 with anorectal malformation, and 517 with Hirschsprung's disease) from 264 hospitals (89 in high-income countries, 166 in middle-income countries, and nine in low-income countries) in 74 countries. Of the 3849 patients, 2231 (58·0%) were male. Median gestational age at birth was 38 weeks (IQR 36-39) and median bodyweight at presentation was 2·8 kg (2·3-3·3). Mortality among all patients was 37 (39·8%) of 93 in low-income countries, 583 (20·4%) of 2860 in middle-income countries, and 50 (5·6%) of 896 in high-income countries (p<0·0001 between all country income groups). Gastroschisis had the greatest difference in mortality between country income strata (nine [90·0%] of ten in low-income countries, 97 [31·9%] of 304 in middle-income countries, and two [1·4%] of 139 in high-income countries; p≤0·0001 between all country income groups). Factors significantly associated with higher mortality for all patients combined included country income status (low-income vs high-income countries, risk ratio 2·78 [95% CI 1·88-4·11], p<0·0001; middle-income vs high-income countries, 2·11 [1·59-2·79], p<0·0001), sepsis at presentation (1·20 [1·04-1·40], p=0·016), higher American Society of Anesthesiologists (ASA) score at primary intervention (ASA 4-5 vs ASA 1-2, 1·82 [1·40-2·35], p<0·0001; ASA 3 vs ASA 1-2, 1·58, [1·30-1·92], p<0·0001]), surgical safety checklist not used (1·39 [1·02-1·90], p=0·035), and ventilation or parenteral nutrition unavailable when needed (ventilation 1·96, [1·41-2·71], p=0·0001; parenteral nutrition 1·35, [1·05-1·74], p=0·018). Administration of parenteral nutrition (0·61, [0·47-0·79], p=0·0002) and use of a peripherally inserted central catheter (0·65 [0·50-0·86], p=0·0024) or percutaneous central line (0·69 [0·48-1·00], p=0·049) were associated with lower mortality.

INTERPRETATION

Unacceptable differences in mortality exist for gastrointestinal congenital anomalies between low-income, middle-income, and high-income countries. Improving access to quality neonatal surgical care in LMICs will be vital to achieve Sustainable Development Goal 3.2 of ending preventable deaths in neonates and children younger than 5 years by 2030.

FUNDING

Wellcome Trust.

Adenomyomatosis of the gallbladder in an adolescent, a very rare condition

Adenomyomatosis of the gallbladder is an acquired, degenerative disease characterized by epithelial proliferation with hypertrophy of the muscularis layer with forming of sinus tracts, termed Rokitansky-Aschoff sinuses. Adenomyomatosis is diagnosed mainly by ultrasonography. The pathogenesis, pathology, and indications for surgery in this condition are not well understood. It is an extremely rare condition in children. We present a case of a 17-year boy with adenomyomatosis of the gallbladder successfully managed with laparoscopic cholecystectomy.

The role of laparoscopy in paediatric and adolescent gynaecology

Paediatric and adolescent gynaecology is a narrow field of medicine dealing with the diagnosis of and treatment of gynaecological diseases from the neonatal period to sexual maturity. The current trend in surgical gynaecology in the paediatric population is to minimise the degree of invasiveness of diagnostic and therapeutic procedures. This contributes to reducing the number of complications and the risk of infertility. Laparoscopic procedures are a challenge for paediatric surgeons and gynaecologists, not only because of the age of treated patients, and anatomical and physiological differences between different age groups but also because of the complexity of the pathology, the differentiation of cancer tumours, and the presence of congenital developmental defects.

Introducing enhanced recovery after surgery protocol in pediatric surgery

BACKGROUND

Enhanced recovery after surgery (ERAS) is a holistic perioperative care protocol created to improve treatment outcomes. Implementation of new rules radically changed the perioperative care of adult patients. The protocol refers to the preoperative, intraoperative and postoperative periods.

OBJECTIVES

To describe a novel pediatric ERAS protocol designed for reverse stoma surgery and to compare a group of patients with implemented ERAS protocol to a group of patients from pre-ERAS period.

MATERIAL AND METHODS

A retrospective comparative review was performed which included 14 patients from pre-ERAS period (2016-2017) and 13 patients in the ERAS period (2018-2019). Total parenteral nutrition (TPN) time, time to oral fluid intake, time to regular diet, time to stooling, and length of stay (LOS) were analyzed.

RESULTS

In the ERAS period, the LOS decreased from 8.64 to 6.08 days, time to oral fluid intake decreased from 4.36 to 1 postoperative day, time to regular diet decreased from 6.14 to 3.23 postoperative day. Total parenteral nutrition decreased from 5.14 in the pre-ERAS period to 1.69 days in the ERAS period. With the progress of implementation of ERAS protocol, TPN was gradually withdrawn.

CONCLUSIONS

The implementation of the pediatric ERAS in children undergoing reverse stoma surgery is safe, reduces patient's metabolic stress and improves treatment outcomes. However, further research is needed.

Evaluation of the usefulness of laparoscopy in the diagnosis and treatment of adnexal pathologies in the pediatric population

INTRODUCTION

The current trend in adnexal surgery in children is to minimize the invasiveness of diagnostic and therapeutic procedures, reduce the number of complications and reduce the risk of infertility.

AIM

Evaluation of the usefulness and effectiveness of laparoscopy in diagnostics and treatment of pathological lesions of adnexa in the pediatric population and evaluation of the correlation of imaging with the intraoperative diagnosis during laparoscopy.

MATERIAL AND METHODS

The study included 89 patients aged 0-18 years (mean: 12.62) who underwent an emergency or elective laparoscopic procedure due to the suspicion of adnexa pathology in the imaging tests or in which intraoperative pathology of the adnexa was found without previous suspicion of these changes in the imaging tests. Patients were divided into 2 groups according to the procedure (emergency or elective) and into 4 age groups.

RESULTS

The most frequent postoperative diagnosis was an adnexal cyst and ovarian tumor. The ratio of malignant to benign lesions was 0.087. In 32.58% of patients appendix pathology was found. Coexistence of adnexa and appendix pathology was statistically significantly more frequent in patients undergoing emergency surgery (p = 0.013). There was no correlation between the size of the tumor or ovarian cyst and the occurrence of adnexal torsion, and no correlation between the size of the tumor and the degree of torsion of the adnexa. Three conversions were performed. The average operation time was 63.7 min.

CONCLUSIONS

Laparoscopic diagnosis and treatment of adnexal pathology seems to be safe due to the low percentage of perioperative complications. It shows high sensitivity in recognizing adnexal pathologies and other defects.

How often does urinary incontinence really affect primary school children?

OBJECTIVE

Introduction: Urinary incontinence should be treated as a pathology in patients who are at least 5 years old, a few percent of patients continue to suffer from this disorderin adolescence. It can be qualified as day-time incontinence (DUI) and nocturnal-incontinence (enuresis-NE). The aim: To assess the incidence of micturition disorders in children aged 7 to 10, to analyze accompanying symptoms and compare the results with previous studies.

PATIENTS AND METHODS

Material and methods: Parents of 954 children (491 girls and 463 boys) were surveyed during parent-teacher meetings held in 2017 in 11 randomly selected schools in southern Poland. The questionnaire was based on International Children's Continence Society guidelines. Study population was divided into subgroups according to demographical data, presence of accompanying symptoms and the type of micturition disorder.

RESULTS

Results: Minor wetting was common in the studied population, however the group of children with clinically significant incontinence becomes smaller after applying current ICCS criteria. ≥1 symptom of urinary bladder malfunction was reported in 18% of cases (17.5% girls and 18.8% boys). Significant (≥1/month) NE was present in 1,7 % of children and significant (≥1/month) DUI in 2,2%. Significant NE combined with significant DUI occurred in 1% of children. Relationships between incontinence and the age at which children stopped wearing diapers, urinary tract infections, soiling and constipation episodes were observed.

CONCLUSION

Conclusions: Unified and clearly defined terminology should be used in order to correctly describe and compare the scale of this problem. Urinary incontinence should not be underestimated, because if untreated it may lead to physical, psychological and social disorders.

Workstations for people with disabilities: an example of a virtual reality approach

This article describes a method of adapting workstations for workers with motion disability using computer simulation and virtual reality (VR) techniques. A workstation for grinding spring faces was used as an example. It was adjusted for two people with a disabled right upper extremity. The study had two stages. In the first, a computer human model with a visualization of maximal arm reach and preferred workspace was used to develop a preliminary modification of a virtual workstation. In the second stage, an immersive VR environment was used to assess the virtual workstation and to add further modifications. All modifications were assessed by measuring the efficiency of work and the number of movements involved. The results of the study showed that a computer simulation could be used to determine whether a worker with a disability could access all important areas of a workstation and to propose necessary modifications.

Heart rate variability (HRV) during virtual reality immersion

The goal of the study was assessment of the hour-long training involving handling virtual environment (sVR) and watching a stereoscopic 3D movie on the mechanisms of autonomic heart rate (HR) regulation among the subjects who were not predisposed to motion sickness. In order to exclude predispositions to motion sickness, all the participants (n=19) underwent a Coriolis test. During an exposure to 3D and sVR the ECG signal was continuously recorded using the Holter method. For the twelve consecutive 5-min epochs of ECG signal, the analysis of heart rate variability (HRV) in time and frequency domains was conducted. After 30 min from the beginning of the training in handling the virtual workstation a significant increase in LF spectral power was noted. The values of the sympathovagal LF/HF index while sVR indicated a significant increase in sympathetic predominance in four time intervals, namely between the 5th and the 10th minute, between the 15th and the 20th minute, between the 35th and 40th minute and between the 55th and the 60th minute of exposure.

[Subjective sensations indicating simulator sickness and fatigue after exposure to virtual reality]

BACKGROUND

The study assessed the incidence and intensity of subjective symptoms indicating simulator sickness among the persons with no inclination to motion sickness, immersed in virtual reality (VR) by watching an hour long movie in the stereoscopic (three-dimensional - 3D) and non-stereoscopic (two-dimensional - 2D) versions and after an hour long training using virtual reality, called sVR.

MATERIAL AND METHODS

The sample comprised 20 healthy young men with no inclination to motion sickness. The participants' subjective sensations, indicating symptoms of simulator sickness were assessed using the questionnaire completed by the participants immediately, 20 min and 24 h following the test. Grandjean's scale was used to assess fatigue and mood.

RESULTS

The symptoms were observed immediately after the exposure to sVR. Their intensity was higher than after watching the 2D and 3D movies. A significant relationship was found between the eye pain and the type of exposure (2D, 3D and sVR) (Chi2)(2) = 6.225, p < or = 0.05); the relationship between excessive perspiration and the exposure to 31) movie and sVR was also noted (Chi2(1) = 9.173, p < or = 0.01). Some symptoms were still observed 20 min after exposure to sVR. The comparison of Grandjean's scale results before and after the training in sVR handing showed significant differences in 11 out of 14 subscales. Before and after exposure to 3D movie, the differences were significant only for the "tired-fatigued" subscale (Z = 2.501, p < or = 0.012) in favor of "fatigued".

CONCLUSION

Based on the subjective sensation of discomfort after watching 2D and 3D movies it is impossible to predict symptoms of simulator sickness after training using sVR.

Life span in online communities

Recently online communities have attracted great interest and have become an important medium of information exchange between users. The aim of this work is to introduce a simple model of the evolution of online communities. This model describes (a) the time evolution of users' activity in a web service, e.g., the time evolution of the number of online friends or written posts, (b) the time evolution of the degree distribution of a social network, and (c) the time evolution of the number of active users of a web service. In the second part of the paper we investigate the influence of the users' lifespan (i.e., the total time in which they are active in an online community) on the process of rumor propagation in evolving social networks. Viral marketing is an important application of such method of information propagation.

Dynamic phenomena and human activity in an artificial society

We study dynamic phenomena in a large social network of nearly 3x10;{4} individuals who interact in the large virtual world of a massive multiplayer online role playing game. On the basis of a database received from the online game server, we examine the structure of the friendship network and human dynamics. To investigate the relation between networks of acquaintances in virtual and real worlds, we carried out a survey among the players. We show that, even though the virtual network did not develop as a growing graph of an underlying network of social acquaintances in the real world, it influences it. Furthermore we find very interesting scaling laws concerning human dynamics. Our research shows how long people are interested in a single task and how much time they devote to it. Surprisingly, exponent values in both cases are close to -1 . We calculate the activity of individuals, i.e., the relative time daily devoted to interactions with others in the artificial society. Our research shows that the distribution of activity is not uniform and is highly correlated with the degree of the node, and that such human activity has a significant influence on dynamic phenomena, e.g., epidemic spreading and rumor propagation, in complex networks. We find that spreading is accelerated (an epidemic) or decelerated (a rumor) as a result of superspreaders' various behavior.

Chemometrics-based approach to enhancing the usefulness of time domain reflectometry in investigating properties of granular materials

Sets of time domain reflectometry waveforms analyzed with appropriate chemometric methods, instead of typical single waveform analysis, enable one to detect and quantify differences between waveforms, even if they appear at the level of several orders of magnitude below the scale of the measurements. Typical applications of such an approach to samples of healthy and damaged grain showed that differences contributing five orders of magnitude below the scale are still detectable. Under more rigorous experimental conditions, the level of detectable differences can be expected to be even lower.

Nonlinear model of epidemic spreading in a complex social network

The epidemic spreading in a human society is a complex process, which can be described on the basis of a nonlinear mathematical model. In such an approach the complex and hierarchical structure of social network (which has implications for the spreading of pathogens and can be treated as a complex network), can be taken into account. In our model each individual has one of the four permitted states: susceptible, infected, infective, unsusceptible or dead. This refers to the SEIR model used in epidemiology. The state of an individual changes in time, depending on the previous state and the interactions with other individuals. The description of the interpersonal contacts is based on the experimental observations of the social relations in the community. It includes spatial localization of the individuals and hierarchical structure of interpersonal interactions. Numerical simulations were performed for different types of epidemics, giving the progress of a spreading process and typical relationships (e.g. range of epidemic in time, the epidemic curve). The spreading process has a complex and spatially chaotic character. The time dependence of the number of infective individuals shows the nonlinear character of the spreading process. We investigate the influence of the preventive vaccinations on the spreading process. In particular, for a critical value of preventively vaccinated individuals the percolation threshold is observed and the epidemic is suppressed.

[Bilateral cervical arterial dissection as a sign of proximal aortic dissection: a rare cause of recidivating TIA]

Proximal aortic dissection is a life-threatening disease. In addition to other complications, involvement of the brain-supplying arteries can lead to acute cerebral ischemia. In the presented case, only the patient's clinical course and duplex sonography, which showed bilateral cervical arterial dissections, led to the diagnosis of aortic dissection. This case emphasizes that early ultrasound examination is crucial in patients with suspected cerebral ischemia.

Evolution of a social network: the role of cultural diversity

We present a simple deterministic and based on local rules model of evolving social network, which leads to a network with the properties of a real social system, e.g., small-world topology and assortative mixing. The state of an individual Si is characterized by the values of Q cultural features, drawn from Gaussian distribution with variance sigma. The other control parameter is sociability Ti, which describes the maximal number of connections of an individual. The state of individuals and connections between them evolve in time. As results from numerical computations, an initial diversity of cultural features in a community has an essential influence on an evolution of social network. It was found that for a critical value of control parameter sigma c(Q) there is a structural transition and a hierarchical network with small-world topology of connections and a high clustering coefficient emerges. The emergence of small-world properties can be related to the creation of subculture groups in a community. The power-law relation between the clustering coefficient of a node and its connectivity C(k) approximately k-beta was observed in the case of a scale-free distribution of sociability Ti and a high enough cultural diversity in a population.

Epidemic spreading in a hierarchical social network

A model of epidemic spreading in a population with a hierarchical structure of interpersonal interactions is described and investigated numerically. The structure of interpersonal connections is based on a scale-free network. Spatial localization of individuals belonging to different social groups, and the mobility of a contemporary community, as well as the effectiveness of different interpersonal interactions, are taken into account. Typical relations characterizing the spreading process, like a range of epidemic and epidemic curves, are discussed. The influence of preventive vaccinations on the spreading process is investigated. The critical value of preventively vaccinated individuals that is sufficient for the suppression of an epidemic is calculated. Our results are compared with solutions of the master equation for the spreading process and good agreement of the character of this process is found.