Possibility of visualization of gastrothorax based on unenhanced postmortem computed tomography/PMCT

Case Report: Late-Presenting Congenital Diaphragmatic Hernia With Tension Gastrothorax

A congenital diaphragmatic hernia (CDH) occurs when the abdominal contents protrude into the thoracic cavity through an opening in the diaphragm. The main pathology lies in the maldevelopment or defective fusion of the pleuroperitoneal membranes. Delayed diagnosis in later childhood as in the index case reported here can lead to life-threatening complications such as tension gastrothorax and gastric volvulus. Such life-threatening conditions should be managed emergently avoiding misdiagnoses and untoward harm to the patient. We report a pediatric case of an 8-year-old boy who presented with respiratory distress, chest pain, and non-bilious vomiting. He was initially diagnosed with tension pneumothorax, and the chest x-ray was interpreted as hydropneumothorax. A chest tube placement was planned but was withheld due to excessive vomiting. A nasogastric (NG) tube was placed, and a barium-filled radiograph showed an intrathoracic presence of the stomach. A diagnosis of a congenital diaphragmatic hernia with tension gastrothorax was made. The posterolateral (Bochdalek) diaphragmatic hernia was repaired successfully. This case report highlights the importance of including a late-presenting CDH in the differential diagnoses of pediatric patients who present with respiratory distress, chest pain, non-bilious vomiting, and radiological findings suggestive of tension pneumothorax.

Oleic Acid (OA), A Potential Dual Contrast Agent for Postmortem MR Angiography (PMMRA): A Pilot Study

Choosing proper perfusates as contrast agents is an important aspect for postmortem magnetic resonance angiography (PMMRA). However, in this emerging field, the number of suitable kinds of liquid is still very limited. The objective of this research is to compare MR images of oleic acid (OA) with paraffin oil (PO) in vitro and in ex situ animal hearts, in order to evaluate the feasibility to use OA as a novel contrast agent for PMMRA. In vitro, OA, PO and water (control) were introduced into three tubes separately and T₁weighted-spin echo (T₁w-SE) and T₂w-SE images were acquired on a 1.5T MR scanner. In the second experiment, OA and PO were injected into left coronary artery (LCA) and left ventricle (LV) of ex situ bovine hearts and their T₁w-SE, T₂w-SE, T₁w-multipoint Dixon (T₁w-mDixon) and 3DT₂w-mDixon images were acquired. The overall results indicate that OA may have a potential to be used as a dual (T₁ and T₂ based) contrast agent for PMMRA when proper sequence parameters are utilized. However, as the pilot study was based on limited number of animal hearts, more researches using OA in cadavers are needed to validate our findings.

Management and outcomes of gastric volvulus in children: a systematic review

BACKGROUND

Gastric volvulus (GV) in children is a rare condition. This study reviewed management and outcomes of GV in the pediatric population.

METHODS

MEDLINE/PubMed, Embase, and Google Scholar databases were searched for studies in English regarding GV in patients < 18 years old between 2008 and 2017, selected by two reviewers. Results were presented as percentages and medians. Fisher's exact test was used to evaluate categorical variables, and Bonferroni correction was applied for multiple comparisons.

RESULTS

Ninety-seven papers with 125 patients were included. The median age was 24 months, with slightly female preponderance. Vomiting was the most common symptom and acute presentation occurred in the majority of cases. History of previous surgery/abdominal trauma was described in 12 and 3 children, respectively. Radiology was diagnostic for GV in most cases. The initial management was surgical in the majority of cases, with most of them including gastropexy, gastrostomy, or gastric resection. Mesenteroaxial GV was associated with acute presentation (P = 0.004) and the latter with ischemia (P < 0.01). Complications occurred in 23 (18.9%) children, esophageal stenosis being the most common. There were eight (6.4%) deaths, and only one recurrence 6 months after endoscopic management. The median follow-up period was 12 months. The inclusion of only case reports/case series, the incomplete reporting from papers, and the short follow-up were limitations of the study.

CONCLUSIONS

GV occurs at a median age of 24 months and requires high suspicion and prompt management, as mortality is considerable. The preferred surgical approach for GV includes variations of gastropexy. Esophageal stenosis is the most common morbidity post-GV management.

State of the art in post-mortem forensic imaging in China

The autopsy and histopathologic examination are traditional and classic approaches in forensic pathology. In recent years, with the tremendous progresses of computer technology and medical imaging technology, the developed post-mortem computer tomography, post-mortem magnetic resonance imaging and other new methods provide non-invasive, intuitive, high-precision examining methods and research tools for the forensic pathology. As a result, the reconstruction of the injury as well as the analysis of injury mechanism has been essentially achieved. Such methods have become popular in the research field of forensic science and related work has also been carried out in China. This paper reviews the development and application of abovementioned post-mortem forensic imaging methods in China based on the relevant literature.

Wandering Spleen and Organoaxial Gastric Volvulus after Morgagni Hernia Repair: A Case Report and Review of the Literature

Wandering spleen and gastric volvulus are two rare entities that have been described in association with congenital diaphragmatic hernia. The diagnosis is difficult and any delay can result in ischemia and necrosis of both organs. We present a case of a 13-year-old girl, previously operated on for anterior diaphragmatic hernia and intrathoracic gastric volvulus, that presented to our service for a subdiaphragmatic gastric volvulus recurrence associated with a wandering spleen. In this report we reviewed the literature, analyzing the clinical presentation, diagnostic assessment, and treatment options of both conditions, in particular in the case associated with diaphragmatic hernia.