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Pneumatosis cystoides intestinalis (PCI) is a rare condition characterized by air accumulation within the subserosa or submucosa of the gastrointestinal wall. We herein report a case involving a woman in her early 30s who developed PCI after undergoing allogeneic hematopoietic stem cell transplantation (HSCT) for acute lymphoblastic leukemia. The patient had a history of multiple COVID-19 infections. Imaging revealed extensive pneumoperitoneum and mesenteric emphysema; nevertheless, the patient remained clinically stable with a benign abdominal examination. She eventually recovered after 1 month of conservative treatment. We believe the PCI in this case had a multifactorial etiology, potentially involving both HSCT and COVID-19. Raising awareness of PCI may help avoid unnecessary surgical interventions and associated morbidity.

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Pneumatosis cystoides was first described by Du Vernay in 1783. This is a fairly rare disease with nonspecific symptoms and CT data on pneumoperitoneum. The authors present pneumatosis intestinalis in a patient with systemic connective tissue disorder. Free gas in abdominal cavity and dilated intestinal loops were an indication for emergency surgery with subsequent resection of intestine due to signs of ischemic damage. A review of clinical cases allows us to conclude that pneumoperitoneum requires careful differential diagnosis. Free gas in abdominal cavity in patients with cystic pneumatosis is an indication for emergency surgery only in case of complicated course of disease.

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Portal vein gas accumulation and intestinal pneumatosis are uncommon signs indicating a high mortality risk in cases of intestinal ischemic necrosis. However, the widespread use of computed tomography has led to an increase in detection of benign lesions. We report a case of portal vein gas accumulation resulting from organophosphorus pesticide poisoning. A male patient was brought to the hospital in a comatose state with bilateral pupils that measured 1.0 mm, and he showed shortness of breath and wet rattles in the lungs. A cholinesterase concentration of 214 U/L was detected on an auxiliary examination. The patient was diagnosed with organophosphorus pesticide poisoning and underwent mechanical ventilation, hemoperfusion, and continuous renal replacement therapy according to the poisoning guidelines. On the fifth day, considerable abdominal distension was observed. An abdominal computed tomography scan revealed dilation of the small bowel and ascending colon with fluid and gas accumulation, as well as gas within the intestinal wall and hepatic veins. Although portal vein gas and intestinal pneumatosis are a sign of mortality requiring immediate surgical intervention, an increasing number of benign cases suggests potential benefits of conservative treatment approaches.

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BACKGROUND: Pneumatosis intestinalis (PI, presence of air in bowel wall) develops in a variety of settings and due to a variety of insults which is then characterized by varying severity and clinical course. Anecdotally, many of these cases are benign with few clinical sequelae; however, we lack evidence-based guidelines to help guide management of such lower-risk cases. We aimed to describe the clinical entity of low-risk PI, characterize the population of children who develop this form of PI, determine if management approach or clinical outcomes differed depending on the managing physician's field of practice, and finally determine if a shortened course of NPO and antibiotics was safe in the population of children with low-risk PI. METHODS: We performed a retrospective review of all children over age 1 year treated at Children's Hospital Colorado (CHCO), between 2009 and 2019 with a diagnosis of PI who did not also have a diagnosis of cancer or history of bone marrow transplant (BMT). Data including demographic variables, clinical course, and outcomes were obtained from the electronic medical record. Low-risk criteria included no need for ICU admission, vasopressor use, or urgent surgical intervention. RESULTS: Ninety-one children were treated for their first episode of PI during the study period, 72 of whom met our low-risk criteria. Among the low-risk group, rates of complications including hemodynamic decompensation during treatment, PI recurrence, Clostridium difficile colitis, and death did not differ between those who received 3 days or less of antibiotics and those who received more than 3 days of antibiotics. Outcomes also did not differ between children cared for by surgeons or pediatricians. CONCLUSIONS: Here, we define low-risk PI as that which occurs in children over age 1 who do not have a prior diagnosis of cancer or prior BMT and who do not require ICU admission, vasopressor administration, or urgent surgical intervention. It is likely safe to treat these children with only 3 days of antibiotic therapy and NPO. LEVEL OF EVIDENCE: Level III.

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BACKGROUND/AIMS: Pneumatosis cystoides intestinalis is not well recognized. Clinical features vary in several case reports, and prognosis remains unclear. We aimed to summarize the clinical and endoscopic features of pneumatosis cystoides intestinalis and to explore potential factors associated with lesion size. MATERIALS AND METHODS: We retrospectively collected clinical and endoscopic features of patients diagnosed with pneumatosis cystoides intestinalis from July 2015 to October 2021. Patients were allocated to 2 groups according to lesion size with 2 cm as boundary value. Baseline characteristics were compared between the groups. RESULTS: A total of 192 patients were included in this study with a 1.3:1 male-to-female ratio. About 91 lesions (47.70%) were ≥2 cm and those patients were more likely to have a history of polypectomy or abdominal surgery compared to lesion size <2 cm (P < .05). For 50 patients who received follow-up colonoscopy, 28 cases (56.00%) disappeared spontaneously and 22 cases (44.00%) remained unchanged. No factors have been observed to be connected with prognosis. CONCLUSIONS: Colonoscopy is beneficial to the diagnosis of pneumatosis cystoides intestinalis. Patients with a history of polypectomy or abdominal surgery were more likely to develop lesions <2 cm. Most patients do not need special treatments and have favorable prognosis.

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BACKGROUND Behcet's disease (BD) is defined as vasculitis involving arteries and veins of any size and affecting almost any organ system. Abdominal manifestations of BD are diverse and nonspecific. Mucosal ulcerations can be seen in the gastrointestinal tract. Extensive ulcerations, especially ileocecal lesions, can lead to perforation, strictures, fistulas, and abscesses. Pneumatosis cystoides intestinale is a rare benign condition characterized by multiple submucosal or subserosal, gas-filled cysts in the gastrointestinal tract wall. Pneumatosis cystoides coli (PCC) affects the colon, can present with a wide range of manifestations, and can mimic many different systemic diseases. We describe a case of PCC in a patient with Behcet's disease who presented to the Emergency Department with a clinical suspicion of acute abdomen. CASE REPORT A 40-year-old man with complicated Behcet's disease, treated with high-dose steroids, presented with acute abdomen and CT scan findings highly suggestive of intestinal obstruction due to ileocolic intussusception. He underwent laparoscopic right hemicolectomy. Pathology demonstrated PCC disease. CONCLUSIONS Pneumatosis cystoides coli can present with a broad range of symptoms and can be secondary to many systemic and autoimmune diseases. With radiological evidence and a high level of suspicion, unnecessary surgery can be prevented.

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Background: Pneumatosis intestinalis (PI), the presence of gas within the intestinal wall, is a condition historically associated with many diagnoses and can be life-threatening. The purpose of this article is to understand PI better in the setting of malnutrition secondary to anorexia nervosa (AN), a condition not historically affiliated with PI. Patients and Methods: In this retrospective study, the clinical findings of seven patients with AN are reported. Results: The patients were all found to have PI involving the right colon, with only a single patient also found to have PI involving additional colonic areas. No patients had small intestine involvement, and most of the patients were also diagnosed with the binge-purge subtype of AN, were receiving tube feeds, and had tenderness on abdominal examination. All seven patients were managed non-operatively. Conclusions: The authors propose that there may be an association between AN and PI. Given the surgical risks associated with malnutrition, the decision to pursue surgery, in the absence of the discussed pathologic risk factors, should be made in a very thoughtful manner. Future studies are warranted to better understand this potential association between PI and AN.

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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.

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Pneumatosis cystoides intestinalis (PCI) is a rare disease that most frequently occurs in the large and small intestine and has no obvious clinical symptoms. The main pathological feature is the presence of air-filled cysts in the intestinal submucosa, intermuscular wall, and subserous membrane. Conservative treatment is the first choice when no serious complications are present, whereas timely surgical treatment is needed for serious and life-threatening complications. This report presents the clinical and pathological analysis of PCI in a man in his early 90s. The patient was hospitalized because of acute abdomen and diagnosed with perforation of the sigmoid colon due to PCI with schistosomiasis after emergency surgery. Emergency partial sigmoid colon resection and permanent colostomy were performed under general anesthesia. Preoperative diagnosis of PCI is difficult because of the nonspecific clinical manifestations and endoscopic findings, and missed diagnosis and misdiagnosis easily occur. Pure PCI has no specific symptoms and does not require special treatment, and there is a lack of special treatment methods in clinical practice. However, when PCI is combined with other intestinal diseases such as schistosomiasis enteropathy, intestinal perforation is likely to occur, leading to severe acute abdomen with the need for prompt surgical treatment.

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Pneumatosis intestinalis (PI) is a rare complication after thoracic organ transplantation. There are several theories for explaining the pathophysiology of this disease. In this paper, we highlight three cases of PI in a single pediatric center, one after lung transplantation and two after heart transplantation. Although the presentations differed, all cases improved with non-surgical therapies. There are not many articles in the pediatric literature about post-transplantation PI, and there are still many questions regarding the incidence, etiology, and treatment for this disease.

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Introduction: Pneumatosis cystoides intestinalis (PCI) is a rare condition characterized by gas-filled cysts in the intestinal wall. Although rare, it may also involve other regions, such as the mesentery. PCI is classified as primary or secondary and is associated with multiple predisposing factors. It may be associated with either a benign condition or a potentially fatal condition, such as mesenteric ischemia. The objective of this study was to review the medical literature on the rare benign presentations of PCI, excluding cases associated with intestinal ischemia.Methods: We conducted a systematic literature review according to the PRISMA statement. We searched PubMed and LILACS databases for articles published between January 2015 and December 2020 using the following Medical Subject Headings: "pneumatosis cystoides intestinalis" and "pneumoperitoneum," "pneumatosis intestinalis," and "pneumoperitoneum" or "mesenteric pneumatosis."Results: We included 51 articles comprising 58 patients with PCI and pneumoperitoneum. Most patients were men, and mean patient age was 64.9 years. We identified an idiopathic etiology in 29.31% of cases, and the most common predisposing factor was immune dysfunction (29.31%). A total of 24.13% of patients were asymptomatic. The most commons symptoms were abdominal pain (43.10%), nausea and vomiting (41.37%), and abdominal distention (37.93%). Diagnostic surgery was conducted in 26 patients (44.82%). Only 1 patient underwent surgical treatment.Conclusions: PCI is a clinical condition that may have a benign etiology and not require surgery. Treatment of the benign etiology is conservative. Thus, life-threatening conditions should be excluded in all cases.

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