Strongyloides stercoralis hyperinfection presenting pneumatosis intestinalis and acute respiratory distress syndrome after treatment for COVID-19.

A 91-year-old man was admitted with vomiting and abdominal pain. He had had COVID-19 pneumonia a month before and the treatment had consisted of remdesivir, dexamethasone and baricitinib. CT scans showed pneumatosis intestinalis. His respiratory condition rapidly deteriorated and chest CT scans showed ground-glass opacity and Strongyloides stercoralis was identified in the sputum, making a diagnosis of hyperinfection syndrome associated acute respiratory distress syndrome. Treatment of ivermectin was not achieved in time and he died of multiple organ failure. S. stercoralis is a soil-transmitted helminth endemic to tropical and subtropical areas. Immunosuppressive conditions can cause hyperinfection syndrome and life-threatening conditions. Our case highlights the importance of assessing for untreated chronic strongyloidiasis in COVID-19 patients requiring steroid treatment in endemic areas.

Presence of pneumatosis intestinalis in a dog with multicentric lymphoma.

A 13-year-old neutered male Lagotto Romagnolo dog had ultrasonographic and computed tomographic findings of pneumatosis intestinalis after presentation to the emergency department because of progressive diarrhea and hyporexia. Further investigations produced a diagnosis of multicentric lymphoma, and treatment with chemotherapy was commenced. Clinical remission of lymphoma was achieved and coincided with resolution of pneumatosis intestinalis on subsequent computed tomographic imaging. Key clinical message: Consider underlying pathology such as neoplasia in cases of pneumatosis intestinalis after excluding surgical emergent causes.

Présence d'une pneumatose intestinale chez un chien atteint d'un lymphome multicentriqueUn chien Lagotto Romagnolo mâle castré de 13 ans a présenté des résultats échographiques et tomodensitométriques de pneumatose intestinale après sa présentation au service des urgences en raison d'une diarrhée progressive et d'une hyporexie. Des examens complémentaires ont permis de poser un diagnostic de lymphome multicentrique et un traitement par chimiothérapie a été débuté. Une rémission clinique du lymphome a été obtenue et a coïncidé avec la résolution de la pneumatose intestinale sur l'imagerie par tomodensitométrie ultérieure.Message clinique clé :Envisager une pathologie sous-jacente telle qu'une néoplasie dans les cas de pneumatose intestinale après avoir exclu les causes d'origine chirurgicale.(Traduit par Dr Serge Messier).

Pneumatosis Intestinalis in Children With Intestinal Failure: The Result of Intestinal Stress From Enteral Feeding?

OBJECTIVE: The incidence and significance of pneumatosis intestinalis (PI) in children with a diagnosis of intestinal failure is not well understood. The aim of this study was to identify clinical and anatomical factors associated with the imaging findings of PI in patients with intestinal failure. METHODS: We performed a retrospective review of all children with a diagnosis of intestinal failure at Children's Hospital Colorado between January 2019 and April 2022. Patients were stratified and compared based on the incidence of PI on abdominal imaging. Differences were compared using 2-sample Wilcoxon tests, chi-square, or Fisher exact tests. RESULTS: There were 111 patients identified with a diagnosis of intestinal failure and 30.6% (34) developed at least 1 instance of PI. There were no differences in etiology of intestinal failure or anatomy between those who developed PI and those who did not. Patients who developed PI, were less likely to be on total parental nutrition (60.6% vs 98.6%, P < 0.001) and more likely to be receiving any form of enteral feeds (87.9% vs 66.2%, P = 0.035) or tube feeds (75.8% vs 44.2%, P = 0.0045). Of the children with PI, 30.3% (10) were undergoing an enteral feed advancement at time of PI development. Three patients with PI underwent laparotomy for PI treatment, 2 of which were negative laparotomies. CONCLUSIONS: The development of PI in children with intestinal failure is likely a benign finding. It is associated with enteral feeding and may be due to increased intestinal stress.

Pneumomediastinum, pneumatosis intestinalis and pneumoperitoneum in a patient with polymyositis: case-based review.

Pneumomediastinum (PnM), pneumatosis intestinalis (PI), and pneumoperitoneum (PP) are rare complications of inflammatory myositis. We present a 59-year-old polymyositis (PM) patient who experienced all three complications simultaneously. The patient who presented with proximal muscle weakness, dysphagia, and weight loss was diagnosed with PM due to elevated muscle enzymes and consistent electromyography and muscle biopsy with inflammatory myopathy. On the 45th day of her immunosuppressive treatment, PnM, PI, and PP were detected incidentally in 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) scan performed for severe weight loss and treatment-resistant severe disease. Since the patient had no symptoms or signs of PnM and PP, no additional intervention was applied to the current treatment, and spontaneous regression was observed in the follow-up. In addition to this case, we reviewed patients with PM who developed PBM, PP, and PI in the literature.

Intestinal obstruction due to pneumatosis intestinalis.

We present the case of an 83-year-old male, with a past medical history of benign pneumoperitoneum secondary to pneumatosis intestinalis which evolved for a number of years with periodic follow-ups. The patient comes to the Emergency Room with sintomatology of intestinal obstruction. Urgent surgical management is decided, an exploratory laparotomy is performed where an intestinal obstruction secondary to pneumatosis intestinalis, with loss of structure of the intestinal wall as visualized in the images, is determined; therefore resection of the affected small intestine segment and primary anastomosis are performed. The pathology report confirms the diagnosis. The patient progresses favorably during the postoperative period and is currently asymptomatic after 12 months.

Pneumatosis intestinalis: a rare endoscopic feature of colonic ischemia.

A 71-year-old male was admitted on intensive care unit after endovascular aneurysm repair of ruptured infrarenal abdominal aortic aneurysm. 2 weeks later, he had multiple episodes of bloody diarrhea. Colonoscopy revealed diffuse dusky mucosal coloration with loss of vasculature pattern, diseased haustrations, and diffuse areas of pneumatosis, suggestive of severe colonic ischemia.

Pneumatosis cystoides intestinalis as a rare cause of non-surgical pneumoperitoneum.

Pneumoperitoneum as a finding on imaging examinations is not always a sign of acute abdomen due to gastrointestinal perforation. These findings must be viewed in connection with the clinical condition and personal history of each patient because they may also indicate a non-surgical or spontaneous pneumoperitoneum. This condition is repeatedly described but very often neglected. This paper presents the case report of a patient with non-surgical pneumoperitoneum where, despite proceeding according to the guidelines, no expected intra-abdominal pathology explaining the patient's problems was found.

Pneumatosis cystoides intestinalis associated with etoposide in hematological malignancies: a case report and a literature review.

Pneumatosis cystoides intestinalis (PCI) is a rare condition characterized by the presence of air collection within the subserosa and/or submucosa of the gastrointestinal wall. Due to the lack of specific symptoms, PCI is likely to be misdiagnosed or missed without the use of imaging techniques or gastrointestinal endoscopy. Here, we report a patient who complained of abdominal distention and constipation after chemotherapy for hematological malignancies, and was diagnosed with secondary PCI via computed tomography (CT) and exploratory laparotomy. Pneumoperitoneum was no longer observed after two weeks of conservative treatments. Notably, the possibility of intra-abdominal pressure (IAP) as a predictor for surgical intervention was proposed. Furthermore, we conducted a literature review on PCI after chemotherapy in hematological malignancies to raise awareness of etoposide-related PCI, while whether PCI could be identified as an adverse event of etoposide requires more evidence.

Gastric Pneumatosis with Portal Venous Gas can be Treated Non-operatively: A Retrospective Multi-institutional Study.

BACKGROUND: Gastric pneumatosis (GP) is a rare radiologic finding with an unpredictable prognosis. The aim of this study was to identify mortality risk factors from patients presenting with GP on computed tomography (CT), and to develop a model which would allow us to predict which patients would benefit most from operative management. METHODS: Between 2010 and 2020, all CT-scan reports in four tertiary centers were searched for the following terms: "gastric pneumatosis," "intramural gastric air" or "emphysematous gastritis." The retrieved CT scans were reviewed by a senior surgeon and a senior radiologist. Relevant clinical and laboratory data for these patients were extracted from the institutions' medical records. RESULTS: Among 58 patients with GP, portal venous gas and bowel ischemia were present on CT scan in 52 (90%) and 17 patients (29%), respectively. The 30-day mortality rate was 31%. Univariate analysis identified the following variables as predictive of mortality at the time of the diagnosis of GP: abdominal guarding, hemodynamic instability, arterial lactate level >2 mmol/l, and the absence of gastric dilatation. Multivariable analysis identified the following variables as independent predictors of mortality: arterial lactate level (OR: 1.39, 95% CI: 1.07-1.79) and the absence of gastric dilatation (OR: 0.07, 95% CI: 0.01-0.79). None of the patients presenting with a baseline lactate rate<2 mmol/l died within 30 days following diagnosis, and no more than 17 patients out of 58 had bowel ischemia (29%). CONCLUSIONS: GP could be managed non-operatively, even in the presence of portal venous gas. However, patients with arterial lactate level>2 mmol/l, or the absence of gastric dilation should be surgically explored due to a non-negligible risk of mortality.

Acute abdomen with gastric volvulus revealing an underlying pneumatosis cystoides intestinalis: a case report.

BACKGROUND: Pneumatosis intestinalis is an abnormal presence of free air outside the lumen of the intestines in many shapes. It is classified based on its etiology to primary or secondary, it affects adults as well as infants and can involve any part of the GI tract. CASE PRESENTATION: We report a case of a 55-year-old man with a past medical history of a surgically repaired perforated duodenal ulcer who presented with an acute abdominal pain, Flatulence and constipation. On examination of the abdomen; severe distension, tenderness and tympanicity on percussion were noted. An erect CXR was performed and showed bilateral sub-diaphragmatic air levels. We performed an abdominal Paracentesis under the right subcostal margin which led to evacuation of large amounts of air. Next, an investigational laparotomy showed that the reason was a gastric volvulus associated with an anterior and posterior gastric wall lacerations. The suitable surgical repair approach was taken, but another lesion was detected incidentally. A pneumatosis cystoides intestinalis (PCI) was extended along large length of the intestines in many shapes and without any symptoms or signs. CONCLUSIONS: Pneumatosis cystoides intestinalis has been reported continuously in relation to peptic ulcer disease (PUD). We aim to report a new association of a gastric volvulus and PCI secondary to pyloric stenosis caused by a duodenal ulcer; which we believe can aid in the diagnosing of dangerous complications, of a rare disease.

Pneumatosis intestinalis in children beyond the neonatal period: is it always benign?

PURPOSE: The significance and management of pediatric pneumatosis intestinalis (PI) remains poorly defined. We sought to add clarity in children beyond the neonatal period. METHODS: Pediatric patients 3 months-18 years admitted to a quaternary children's hospital with a diagnosis of PI were included in this retrospective study. Pathologic PI was defined as irreversible, transmural intestinal ischemia. RESULTS: 167 children were identified with PI. Of these children, 155 (92.8%) had benign PI and 12 (7.2%) developed pathologic PI. The most common underlying diagnosis for pathologic PI was global developmental delay (75%), although we identified a spectrum of underlying diagnoses at risk for PI. Physical exam notable for abdominal distension (p = 0.023) or guarding (p = 0.028), and imaging with portal venous gas (p < 0.001) or bowel distension (p = 0.001) were significantly associated with pathologic PI. Only 6.6% of all children underwent an operation. For those undergoing non-surgical management of benign PI, 75% of children received antibiotics and average duration of bowel rest was 6.8 days. CONCLUSIONS: PI in children is primarily a benign phenomenon and often does not warrant surgical intervention. Bowel rest and antibiotics are therapeutic strategies frequently used in the treatment of this finding.

The effect of single ventricle congenital heart disease on recurrence risk of pneumatosis intestinalis in neonates.

PURPOSE: Congenital heart disease (CHD) is a risk factor for the development of pneumatosis intestinalis (PI). Patients with single ventricle physiology (SVP) may be at higher risk of developing PI secondary to variations in systemic blood flow which affect bowel perfusion when compared to patients with biventricular physiology (BVP). We hypothesized that patients with SVP would have increased risk of recurrent PI. METHODS: A retrospective review was done from 10/2014 through 05/2020 with patients that met the following criteria: CHD, radiographic evidence of PI, and less than 1 year of age. Groups were divided based on ventricular physiology. Primary outcome was radiographic recurrence of PI and secondary outcomes were average antibiotic duration, NPO duration, median length of stay, need for GI operation, and death from PI. RESULTS: A total of 51 patients were included, 34 with SVP and 17 with BVP. 26.47% of SVP had recurrence of PI whereas no BVP experienced a recurrence of PI. There was no significant difference in any of the secondary outcomes. CONCLUSION: Our data suggest that patients with SVP are more likely to have recurrence of radiographic PI. We may need to consider patients with SVP that get PI as their own separate group.

Endoscopic imaging of pneumatosis intestinalis.

This is a case report on the colonoscopic finding of intestinal pneumatosis.

Pneumatosis intestinalis in a pediatric patient.

A 4-month-old girl was admitted to the Emergency Department with gastric vomiting and bloody diarrhea. On physical examination, the abdomen was distended, painful, with evidence of peritoneal irritation. The abdominal X-ray showed the presence of intraluminal gas in the ascending colon, sigmoid and rectum.

Intestinal pneumatosis: a rare and misdiagnosed entity.

Intestinal pneumatosis is a rare entity, usually found incidentally, and in most cases asymptomatic. We present the case of an 84-year-old man who underwent colonoscopy for adenomatous polyps surveillance and presented typical endoscopic images of intestinal pneumatosis. Some of the most important aspects of the disease are highlighted and even if the endoscopic image is quite impressive, conservative management is the treatment of choice.

Clinical Predictors and Outcomes for Recurrent Pneumatosis Intestinalis in Children: A Case Control Study.

INTRODUCTION: Pneumatosis intestinalis (PI) is air collections within the wall of the intestine that can be associated with life threatening conditions. Recurrent episodes of PI have been reported; however, little is known about risks for recurrent disease. This study aims to identify predictors of recurrent PI and evaluate long-term outcomes in patients with recurrent PI. METHODS: This retrospective case-control study evaluated patients, ages 6 months to 18 years, with imaging evidence of PI over a 30-month period. Images were analyzed by consensus to confirm PI. Recurrent PI was defined as new findings of PI after resolution by imaging and/or at least 1-month interval between episodes of PI. Univariate and multivariable analyses were performed using logistic regression, with significance set to P < 0.05. RESULTS: Forty-six children were included. Recurrent PI occurred in 17 (37%) patients, with a total of 39 episodes. Predictors of recurrent PI all related to the segment of bowel involved with small bowel PI predictive of recurrent PI (odds ratio [OR] 1.6; 95% confidence interval [CI] 1.01, 2.4) and colonic PI protective (OR 0.6; 95% CI 0.4, 0.87) after adjusting for age. Predictors for surgical intervention included cerebral palsy (OR 17; 95% CI 1.7, 167) and PI involving small bowel (OR 19; 95% 3.1, 114). CONCLUSION: Location of PI is predictive of recurrence. Clinical outcomes were similar between groups with single episode and recurrent PI.

Pneumatosis intestinalis and porto-mesenteric venous gas: a multicenter study.

BACKGROUND: Estimating the prognosis of patients with pneumatosis intestinalis (PI) and porto-mesenteric venous gas (PMVG) can be challenging. The purpose of this study was to refine prognostication to improve decision making in daily clinical routine. METHODS: A total of 290 patients with confirmed PI were included in the final analysis. The presence of PMVG and mortality (90d follow-up) were evaluated with regard to the influence of possible risk factors. Furthermore, a linear estimation model was devised combining significant parameters to calculate accuracies for predicting death in patients undergoing surgery by means of a defined operation point (ROC-analysis). RESULTS: Overall, 90d mortality was 55.2% (160/290). In patients with PI only, mortality was 46.5% (78/168) and increased significantly to 67.2% (82/122) in combination with PMVG (median survival: PI: 58d vs. PI and PMVG: 41d; p < 0.001). In the entire patient group, 53.5% (155/290) were treated surgically with a 90d mortality of 58.8% (91/155) in this latter group, while 90d mortality was 51.1% (69/135) in patients treated conservatively. In the patients who survived > 90d treated conservatively (24.9% of the entire collective; 72/290) PMVG/PI was defined as "benign"/reversible. PMVG, COPD, sepsis and a low platelet count were found to correlate with a worse prognosis helping to identify patients who might not profit from surgery, in this context our calculation model reaches accuracies of 97% specificity, 20% sensitivity, 90% PPV and 45% NPV. CONCLUSION: Although PI is associated with high morbidity and mortality, "benign causes" are common. However, in concomitant PMVG, mortality rates increase significantly. Our mathematical model could serve as a decision support tool to identify patients who are least likely to benefit from surgery, and to potentially reduce overtreatment in this subset of patients.

Blinatumomab-related pneumatosis intestinalis in a pediatric patient with relapsed acute lymphoblastic leukemia: A case report.

INTRODUCTION: Pneumatosis intestinalis is characterized by air in the subserosal or submucosal layer of the intestine, with the severity ranging from mild and asymptomatic to symptomatic with serious conditions such as intestinal ischemia and perforation requiring surgery. Although several etiologies, including those from conventional chemotherapy agents and molecular target agents, have been suggested, blinatumomab-related pneumatosis intestinalis is quite rare. CASE REPORT: An 11-year-old girl with history of B-cell ALL presented with bone marrow relapse 3 years after completion of initial chemotherapy. Reinduction chemotherapy and blinatumomab as post-reinduction consolidation were initiated. On day 28 of blinatumomab therapy, pneumatosis intestinalis from the ascending colon to the hepatic flexure was found incidentally on abdominal computed tomography.Management and outcome: After withholding blinatumomab therapy for 1 month, pneumatosis intestinalis improved significantly without abnormal gastrointestinal symptoms. Blinatumomab was resumed and safely completed. The computed tomography performed 4 months later showed complete resolution of pneumatosis intestinalis. The patient has been in good condition for over 1 year to date. DISCUSSION: To our knowledge, this is the first case report of pneumatosis intestinalis after blinatumomab therapy in a pediatric patient with relapsed precursor B-cell acute lymphoblastic leukemia. Herein, we highlight the importance of early detection of pneumatosis intestinalis through imaging follow-up during blinatumomab therapy.

Pseudo-pneumatosis of the gastrointestinal tract: its incidence and the accuracy of a checklist supported by artificial intelligence (AI) techniques to reduce the misinterpretation of pneumatosis.

PURPOSE: To assess the incidence of erroneous diagnosis of pneumatosis (pseudo-pneumatosis) in patients who underwent an emergency abdominal CT and to verify the performance of imaging features, supported by artificial intelligence (AI) techniques, to reduce this misinterpretation. METHODS: We selected 71 radiological reports where the presence of pneumatosis was considered definitive or suspected. Surgical findings, clinical outcomes, and reevaluation of the CT scans were used to assess the correct diagnosis of pneumatosis. We identified four imaging signs from literature, to differentiate pneumatosis from pseudo-pneumatosis: gas location, dissecting gas in the bowel wall, a circumferential gas pattern, and intramural gas beyond a gas-fluid/faecal level. Two radiologists reevaluated in consensus all the CT scans, assessing the four above-mentioned variables. Variable discriminative importance was assessed using the Fisher exact test. Accurate and statistically significant variables (p-value < 0.05, accuracy > 75%) were pooled using boosted Random Forests (RFs) executed using a Leave-One-Out cross-validation (LOO cv) strategy to obtain unbiased estimates of individual variable importance by permutation analysis. After the LOO cv, the comparison of the variable importance distribution was validated by one-sided Wilcoxon test. RESULTS: Twenty-seven patients proved to have pseudo-pneumatosis (error: 38%). The most significant features to diagnose pneumatosis were presence of dissecting gas in the bowel wall (accuracy: 94%), presence of intramural gas beyond a gas-fluid/faecal level (accuracy: 86%), and a circumferential gas pattern (accuracy: 78%). CONCLUSION: The incidence of pseudo-pneumatosis can be high. The use of a checklist which includes three imaging signs can be useful to reduce this overestimation.

Primary or idiopathic intestinal pneumatosis: a rare casual endoscopic finding.

A 66-year-old male patient with no specific prior medical history consulted due to constipation without other associated symptoms. A colonoscopy was performed and multiple pseudonodular lesions were detected from the sigmoid to splenic angle in the form of air bubbles with normal-appearing mucosa and a preserved vascular pattern. Gas was released when the biopsies were being taken. An abdominal computed tomography (CT) scan was performed due to the suspicion of an idiopathic or primary intestinal pneumatosis, in which the findings confirmed the diagnosis.