The spectrum of pneumatosis intestinalis in the adult. A surgical dilemma

Pneumatosis cystoides intestinalis in granulomatosis with polyangiitis: a case report

This study aims to investigate the clinical manifestations, imaging features, and treatment considerations in the rare occurrence of pneumatosis cystoides intestinalis (PCI) within the context of granulomatosis with polyangiitis (GPA). We present the case of a 71-year-old Chinese woman diagnosed with GPA, who, despite exhibiting fatigue, knee pain, and nasosinusitis, remained asymptomatic for PCI. Regular follow-up revealed laboratory and imaging evidence indicative of clinical relapse. The patient received GPA treatment but was not specifically managed for PCI. Serial abdominal CT scans were performed to monitor the progression of PCI. Radiological diagnosis confirmed the presence of gas within the colon wall, indicating pneumatosis cystoides intestinalis. Notably, the patient remained asymptomatic for abdominal complaints. Despite ongoing GPA treatment, a follow-up CT scan 2 months later revealed persistent gas within the colon wall, suggesting a persistent state of PCI. Patient consent was obtained for the publication of this case report, and ethical approval was not obtained as this study constitutes a retrospective review. This case underscores the importance of recognizing pneumatosis cystoides intestinalis as a potential complication in GPA patients, even in the absence of typical abdominal symptoms. Further research is warranted to elucidate the underlying mechanisms and optimal management strategies for this rare association. Key points • Rare association: This case report sheds light on the uncommon occurrence of pneumatosis cystoides intestinalis (PCI) within the context of granulomatosis with polyangiitis (GPA), adding to the understanding of the spectrum of manifestations of GPA. • Clinical manifestations: Despite being diagnosed with GPA and experiencing symptoms such as fatigue, knee pain, and nasosinusitis, the patient remained asymptomatic for PCI, emphasizing the importance of vigilant clinical monitoring in GPA patients. • Imaging features: Radiological imaging, including serial abdominal CT scans, played a crucial role in diagnosing and monitoring the progression of PCI in the absence of typical abdominal complaints, highlighting the utility of imaging modalities in detecting silent manifestations of gastrointestinal complications in GPA. • Treatment considerations: The case highlights the challenge of managing PCI in GPA patients, especially when asymptomatic, and raises questions about the optimal management strategies for such rare associations, underscoring the need for further research in this area.

Association of Pneumatosis Intestinalis With Surgical Outcomes and Mortality: A Matched, Retrospective Cohort Study and Literature Review

Background

To determine the clinical importance of pneumatosis intestinalis (PI) on surgical decision-making and patient outcomes.

Methods

A matched cohort observational study was conducted including all clinical encounters for both ambulatory and inpatient care at UCLA Health between February 15, 2006 and January 31, 2023. Patients were initially identified using encounter diagnostic codes for "other specified diseases of intestine." A radiologic diagnosis of PI was then assessed using natural language processing techniques followed by confirmation using manual chart review. Patients who did not have PI served as a control group. Patient comorbidity was assessed using Elixhauser comorbidity scores. Logistic regression and Cox hazard analyses were used to assess associations between PI and mortality. The main outcome was 90-day all-cause mortality. Secondary outcomes were the proportion of patients undergoing surgery and, of those, how many required bowel resections.

Results

Of the 16,728 patients identified by diagnostic coding, 315 were confirmed to have a diagnosis of PI. The 90-day mortality rate for all patients with PI was 29%. Surgery was performed for 62 patients (20%), of whom 46 (72%) underwent bowel resection and 16 (28%) underwent abdominal exploration alone. Most patients underwent surgery for peritonitis (37%), bowel obstruction (31%), and/or pneumoperitoneum (23%) in association with PI; whereas only 8% of patients received surgery exclusively for PI. There was no statistically significant association between PI and mortality with logistic regression conditioned on other risk factors for mortality. In contrast, survival analysis of a matched cohort demonstrated a small effect of PI on mortality (hazard ratio = 1.24: 95% confidence interval = 1.16-1.32, P = 0.021).

Conclusions

Most patients with a diagnosis of PI survive without requiring surgery. Of those who undergo surgery, nearly all have indications for laparotomy exclusive of PI. Mortality in patients who have pneumatosis is strongly associated with comorbid disease, with little to no independent association with PI. Our findings suggest that the presence of PI should not be a primary indication for surgical intervention.

Chemotherapy-induced pneumatosis intestinalis followed by hepatic portal venous gas. A case report

Pneumatosis intestinalis (PI) is a rare disease, and there are many theories about its pathogenesis. Hepatic portal venous gas (HPVG), is thought to occur secondary to intramural intestinal gas emboli migrating through the portal venous system via the mesenteric veins. PI accompanied by HPVG is usually a sign of bowel ischaemia and is associated with a high mortality rate. We report here, a patient with liver metastases from colorectal cancer who developed PI followed by HPVG after treatment with 5-Fluorouracil, leucovorin, and oxaliplatin (mFOLFOX6). Timely attention and management of gastrointestinal symptoms following chemotherapy are essential in the treatment of this type of patient.

Idiopathic Pneumatosis cystoides intestinalis of the small bowel with pneumoperitoneum and consecutive small bowel mesenteric torsion. A case report

INTRODUCTION

Pneumatosis cystoides intestinalis (PCI) is a condition characterized by the presence of gas-filled cyst-like structures in the submucosa and subserosa of the small or large intestine and in some cases accompanied by pneumoperitoneum. PCI is commonly considered a benign condition as opposed to pneumatosis intestinalis in life-threatening conditions such as mesenteric ischemia. Only a minority of cases of PCI are assumed to be primary or idiopathic with the majority being caused by a variety of underlying conditions. Symptoms of PCI are non-specific or may be absent altogether. Provided that there is no suspicion of an underlying life-threatening disease, PCI can be treated non-operatively.

CASE PRESENTATION

We present the case of a 71-year-old patient with pneumatosis intestinalis with free intraperitoneal gas known for three years. Due to self-limiting symptoms and lack of evidence of a life-threatening underlying disease, no specific therapy had been carried out so far. No underlying diseases could be found. Because of recurrent worsening abdominal pain and newly diagnosed partial small bowel obstruction with radiological signs of mesenteric torsion, resection of the affected small bowel was successfully performed.

DISCUSSION

Non-surgical management of PCI is possible provided that life-threatening causes of pneumatosis have been ruled out. Bowel obstruction is a rare complication of PCI which requires surgical treatment.

CONCLUSION

Our case report illustrates that symptoms of PCI may worsen over time, and that complications requiring surgical intervention may occur. We recommend regular monitoring of patients who are primarily treated non-operatively.