Eosinophilic Gastrointestinal Disorders

Eosinophilic Disorders of the Gastrointestinal Tract and Associated Abdominal Viscera: Imaging Findings and Diagnosis

Eosinophilic gastrointestinal disorders (EGIDs) are inflammatory conditions of the gastrointestinal tract that are characterized by tissue eosinophilia and end-organ dysfunction or damage. Primary EGIDs are associated with atopy and other allergic conditions, whereas secondary EGIDs are associated with underlying systemic diseases or hypereosinophilic syndrome. Within the spectrum of EGIDs, eosinophilic esophagitis is the most prevalent. Eosinophilic gastroenteritis and eosinophilic colitis are relatively uncommon. Eosinophilic infiltration of the liver, biliary tree, and/or pancreas also can occur and mimic other inflammatory and malignant conditions. Although endoscopic evaluation is the method of choice for eosinophilic esophagitis, radiologic evaluation of the esophagus plays an important role in the assessment of disease severity. CT and MR enterography are the modalities of choice for demonstrating specific forms of eosinophilic gastroenteritis. CT and MRI are important in the detection of abdominal visceral involvement in EGIDs. Diagnosis is often challenging and relies on symptoms, imaging findings, histologic confirmation of tissue eosinophilia, and correlation with peripheral eosinophilia. Imaging is crucial for identifying characteristic organ-specific findings, although imaging findings are not specific. When promptly treated, EGIDs usually have a benign clinical course. However, a delayed diagnosis and associated surgical interventions have been associated with morbidity. Therefore, a radiologist's knowledge of the imaging findings of EGIDs in the appropriate clinical settings may aid in early diagnosis and thereby improve patient care. An overview of the clinical features and imaging findings of EGIDs and the eosinophilic disorders of associated abdominal viscera is provided. Online supplemental material is available for this article. ^©RSNA, 2022.

Case Report: Food Protein-Induced Protein Losing Enteropathy (FPIPLE) in Infancy

Food-protein induced protein-losing enteropathy (FPIPLE) is a mixed IgE and non-IgE food allergy in infants along with eosinophilic gastrointestinal (GI) diseases (EGID). It is characterized by poor weight gain, edema, due to hypoproteinemia/hypoalbuminemia by enteral loss of proteins, anemia, eosinophilia, raised fecal α1-antitrypsin (α1AT), and specific-IgE and allergy skin prick test (SPT) positive for offending foods. Here, we describe 4 cases with the same clinical pattern (edema due to hypoproteinemia/hypoalbuminemia from enteral loss of proteins, confirmed by high α1AT in the stools and no other pathological findings explaining the hypoproteinemia including normal kidney and liver function parameters), and propose the term "food-protein induced protein-losing enteropathy" (FPIPLE) to define this clinical entity. We also propose diagnostic criteria and an empirical algorithm of a practical approach to the diagnosis and management for children suspected to have FPIPLE. These infants can be managed successfully with dietary modification. In our 4 cases, initially, an empirical elimination diet was applied, comprising the foods that had benn introduced in the infant's diet during the last month and, an extensively hydrolyzed or elemental formula was given. In a second approach, after evaluation by a pediatric allergist, an allergy test-directed dietary elimination alimentation was implemented, for mother and/or infant. It has yet to be demonstrated whether patients with FPIPLE are a subset of patients with EGID, and whether early intervention modifies the natural course.

Microbiological and Immunological Markers in Milk and Infant Feces for Common Gastrointestinal Disorders: A Pilot Study

The objective of this pilot study was to assess the fecal microbiome and different immunological parameters in infant feces and maternal milk from mother-infant pairs in which the infants were suffering from different gastrointestinal disorders (colic, non-IgE-mediated cow milk protein allergy (CMPA), and proctocolitis). A cohort of 30 mother-infant pairs, in which the infants were diagnosed with these gastrointestinal disorders or included as healthy controls, were recruited. Bacterial composition of infant feces and breast milk was determined by metataxonomic sequencing. Immunological compounds were quantified using multiplexed immunoassays. A higher abundance of Eggerthellaceae, Lachnospiraceae and Peptostreptococcaceae, and lower abundance of Bifidobacterium and higher abundance of Rothia were registered in fecal samples from the CMPA group. Eggerthellaceae was also significantly more abundant in milk samples of the CMPA group. There were no differences in the concentration of immunological compounds in infant fecal samples between the four groups. In contrast, differences were found in the concentration and/or frequency of compounds related to acquired immunity and granulocyte colony stimulating factor (GCSF) in breast milk samples. In conclusion, a few microbial signatures in feces may explain part of the difference between CMPA and other infants. In addition, some milk immunological signatures have been uncovered among the different conditions addressed in this pilot study.

Upper Gastrointestinal Bleed in a Young Male- A Rare Presentation of Eosinophilic Gastroenteritis

Eosinophilic gastroenteritis (EGE) is a rare idiopathic disease affecting multiple organs (stomach and small intestine) of the digestive tract. It is characterized by eosinophilic infiltration of the bowel wall to a variable depth and symptoms associated with gastrointestinal tract disease. The prevalence of this condition is ranging from 8 and 28 per 100,000. We present a rare presentation of EGE manifesting as upper GI bleeding.  A 28-year-old male with PMH of EGE, duodenal ulcers, and stricture presented to the hospital with the chief complaints of three episodes of dizziness and melena over one day. His home medications included prednisone, montelukast, and pantoprazole. On admission, he was found to be tachycardic (150) while other vital signs were stable. Physical examination revealed cold, pale and clammy skin but was otherwise normal on examination. Initial labs showed hemoglobin (hgb) of 9.3. His hospital course was complicated with 1 episode of large volume hematemesis >1.5 L and brief loss of consciousness for which a code rapid response was called. On day 2, the hgb dropped to 5.7 and the patient received a blood transfusion. Emergent endoscopy (EGD) revealed high-grade duodenal stenosis, severe pyloroduodenal deformity and a duodenal ulcer with the visible vessel. Two clips were deployed blindly. Epinephrine could not be injected due to hard and fibrotic tissue around duodenal stenosis. The Interventional Radiology team was consulted and emergent angiography was done which revealed active bleeding from a branch of the gastric artery. Embolization was done and hemostasis was achieved successfully. He needed 5 units of PRBC transfusion in total. He was treated with pantoprazole twice a day intravenously since admission. For his known duodenal stricture, the surgical team was consulted. No acute surgical intervention was recommended. On discharge, he was sent home with pantoprazole 40 mg twice a day, slow tapering of prednisone and close follow up with gastroenterology, surgery, and primary care doctor within 1 week. The purpose of this case report is to increase awareness about this clinical condition among medical professionals.

Eosinophilic Esophagitis in Children: Clinical Findings and Diagnostic Approach

Eosinophilic esophagitis (EoE) is an emerging chronic immune and antigen-mediated clinicopathologic disease. During the last 2 decades, the incidence of this condition in children has increased significantly, thanks to practitioners for creating the awareness and higher use of diagnostic endoscopy. We have analysed paediatric literature on EoE focusing on the epidemiology, pathophysiology, clinical findings and diagnostic approach. EoE is pathogenically related to a Th2 inflammation characterized by a mixed IgE and non-IgEmediated reaction to food and/or environmental agents. This leads to esophageal dysfunction and remodeling accompanied by subepithelial fibrosis. EoE can be presented with several range of gastrointestinal symptoms, including regurgitation, vomiting, feeding difficulties or feeding refusal in infants and toddlers, as well as heartburn, dysphagia and food bolus impaction in older children and adults. The diagnostic suspicion is based on the presence of chronic symptoms of esophgeal dysfunction and esophageal eosinophilia characterised histologically by a significant eosinophilic infiltration of the oesophageal mucosa (>15 eosinophils per high powered field). In this review, we will provide an update on clinical presentation and diagnostic approach to EoE in children. We emphasized on the relevant aspects of the new clinical condition termed "PPI responsive esophageal eosinophilia", as entities distinct from EoE and the role of PPI trial in the diagnostic workup, therefore we proposed a new diagnostic algorithm.

Retrospective study of budesonide in children with eosinophilic gastroenteritis

BACKGROUND

The effectiveness of budesonide (BUD), a locally active steroid, on eosinophilic gastroenteritis (EGE) is not well understood. This study is to retrospectively evaluate the efficacy of BUD in children with EGE.

METHODS

Forty-four children, diagnosed with EGE, were enrolled from 2013 to 2017 in our center. According to patients' preference, all the patients were treated with dietary elimination (DE) and montelukast therapy, or combined with prednisone (PRED)/BUD. Patients' clinical manifestations, treatments, and outcomes were reviewed from the medical records. Twenty-four patients (7 PRED, 7 BUD, 10 DE) received therapy for ≥8 weeks, followed by repeat endoscopy and biopsies. Histological response was defined as <20 eos/hpf (eosinophils per high-power field).

RESULTS

Significant number of patients in DE+PRED (6/7, 85.7%) and DE+BUD (6/7, 85.7%) groups achieved histological response than in the DE group (3/10.30%) (p = 0.024). Mean post-treatment peak eos/hpf in the DE+PRED group was 16.57 ± 6.85 vs. 10.00 ± 5.07 in the DE+BUD group vs. 36.60 ± 24.57 in the DE group (p = 0.009). Change of eos/hpf from pre- to post-treatment was -49.86 ± 45.02 vs. -34.29 ± 23.44 in the BUD group vs. -0.3 ± 23.95 in the DE group (p = 0.011). There were no significant differences between DE+PRED and DE+BUD groups (p = 0.470, p = 0.363, respectively).

CONCLUSION

BUD is effective in the treatment of EGE and has similar effectiveness with PRED.

Severe anaemia after gastric biopsy in an infant with eosinophilic gastritis

Background

Eosinophilic gastrointestinal disorders (EGID) are characterized by eosinophilic inflammation and are subclassified according to the affected site(s) as eosinophilic esophagitis, eosinophilic gastritis, eosinophilic enteritis and eosinophilic colitis. Clinical presentation includes dyspeptic symptoms, vomiting, abdominal pain, diarrhoea and gastrointestinal bleeding. Peripheral eosinophilia is usually found but is not required for the diagnosis. The treatment is based on dietary elimination therapy, consisting of removal of common food triggers, most frequently cow’s milk in infants. Corticosteroids are used as first line drug therapy in EG if dietary therapy fails to achieve an adequate clinical response or is impractical.

Case presentation

A four month old infant was admitted for an episode of melena and hematemesis. An esophagogastroduodenoscopy showed haemorrhagic gastritis with ulcerative lesions and fibrin. A significant gastric bleeding was noted after the procedure. The gastric mucosa biopsies showed an eosinophilic infiltration.

Conclusions

A clinically relevant anaemia is a quite rare complication in infants with eosinophilic gastritis and a biopsy may worsen bleeding, to a potentially severe level of low haemoglobin. In infants with low haemoglobin levels and suspect eosinophilic gastritis a watchful follow up after the biopsy should be considered, as well as the possibility of postponing the biopsy to reduce the bleeding risk.

Individuals affected by eosinophilic gastrointestinal disorders have complex unmet needs and frequently experience unique barriers to care

INTRODUCTION

Eosinophilic gastrointestinal disorders (EGIDs) are a rare but emerging healthcare problem. Patient advocacy groups (PAGs) have an important role in representing the EGID community, and serve as valuable research partners. By leveraging the partnership between medical researchers and PAGs, we examined the unmet needs and barriers to care perceived by individuals affected by EGIDs. Next, we examined if these varied between adult EGID patients and adult caregivers of children with EGID.

METHODS

Adult EGID patients and adult caregivers of children (<18 years) with EGIDs participated in this study. PAGs conducted focus groups comprised of individuals affected by EGIDs to identify domains and questions meaningful to the EGID community and this information was used to develop an online REDCap survey. The survey consisted of 58 questions across medical, healthcare, social, and emotional impact domains. It was distributed via the PAGs' web-based platforms. Demographic data, and responses to questions on a six-point Likert scale were collected and analyzed.

RESULTS

Of the 361 responses analyzed, 90 (25%) were from adult EGID patients and 271 (75%) were from adult caregivers. Of the applicable responses, in the medical domain only 19% of participants indicated that repeated endoscopies to monitor response to treatment was convenient. In the healthcare domain, 67% indicated that lack of insurance coverage for elemental formula was a barrier. In the social domain, only 5% of respondents reported adequate awareness of EGIDs in schools. In the emotional domain, 64% had experienced significant stress due to EGID related out-of-pocket costs. Multivariate logistic regression revealed that some of these responses varied between adult EGID patients and adult caregivers of children with EGID. The respondents indicated highest priority for improvement in the medical domain compared to other domains.

CONCLUSIONS

Individuals affected by EGIDs have a constellation of complex unmet needs and perceived barriers across medical, healthcare, social and emotional domains. Addressing unmet needs in the medical domain is relatively more important for the EGID community. Understanding unmet needs and barriers will likely help design improved patient-centered EGID care paradigms.

Massive hemorrhagic ascites: A rare presentation of eosinophilic gastroenteritis

According to Klein’s classification system, the symptomatology of eosinophilic gastroenteritis (EG), a rare disease, differs based on the affected tissue layer. Patients with subserosal EG often have peritoneal effusion. Hemorrhagic ascites due to EG is extremely rare and has not been reported in the literature. Here, we report a 57-year-old woman with EG and massive hemorrhagic ascites. Laboratory investigations showed elevated peripheral eosinophils with significant eosinophilia (65.6%). Ultrasonography showed massive abdominal ascites. Abdominal paracentesis revealed hemorrhagic peritoneal fluid and microscopy showed predominant eosinophils. Upper gastrointestinal endoscopy revealed erosions, exudates, and mucosal rings in the duodenal mucosa; histological examination indicated eosinophilic infiltration. EG presenting with hemorrhagic ascites was diagnosed by histologic examination of eosinophilic infiltration. She was empirically treated with ketotifen 1 mg bid po with rapid resolution of ascites and a remarkable decline in peripheral eosinophil counts. Clinicians should consider the differential diagnosis of unexplained hemorrhagic ascites.

An algorithm for the classification of mRNA patterns in eosinophilic esophagitis: Integration of machine learning

BACKGROUND

Diagnostic evaluation of eosinophilic esophagitis (EoE) remains difficult, particularly the assessment of the patient's allergic status.

OBJECTIVE

This study sought to establish an automated medical algorithm to assist in the evaluation of EoE.

METHODS

Machine learning techniques were used to establish a diagnostic probability score for EoE, p(EoE), based on esophageal mRNA transcript patterns from biopsies of patients with EoE, gastroesophageal reflux disease and controls. Dimensionality reduction in the training set established weighted factors, which were confirmed by immunohistochemistry. Following weighted factor analysis, p(EoE) was determined by random forest classification. Accuracy was tested in an external test set, and predictive power was assessed with equivocal patients. Esophageal IgE production was quantified with epsilon germ line (IGHE) transcripts and correlated with serum IgE and the T_h2-type mRNA profile to establish an IGHE score for tissue allergy.

RESULTS

In the primary analysis, a 3-class statistical model generated a p(EoE) score based on common characteristics of the inflammatory EoE profile. A p(EoE) ≥ 25 successfully identified EoE with high accuracy (sensitivity: 90.9%, specificity: 93.2%, area under the curve: 0.985) and improved diagnosis of equivocal cases by 84.6%. The p(EoE) changed in response to therapy. A secondary analysis loop in EoE patients defined an IGHE score of ≥37.5 for a patient subpopulation with increased esophageal allergic inflammation.

CONCLUSIONS

The development of intelligent data analysis from a machine learning perspective provides exciting opportunities to improve diagnostic precision and improve patient care in EoE. The p(EoE) and the IGHE score are steps toward the development of decision trees to define EoE subpopulations and, consequently, will facilitate individualized therapy.

Food allergen triggers are increased in children with the TSLP risk allele and eosinophilic esophagitis

OBJECTIVES

TSLP has been shown to be associated with eosinophilic esophagitis (EoE). Specifically, children with EoE often have the nucleotides AA or AG instead of GG at the single nucleotide polymorphism position RS3806932. Presently, the phenotypic characteristics in EoE children with the TSLP EoE risk allele are unknown.

METHODS

A retrospective analysis was performed of all children with EoE who had TSLP genotyping at The Children's Hospital of Philadelphia from 2008-2014. EoE food allergen triggers, presence of atopic features, IgE mediated food allergy and skin prick testing results were reviewed. The number and type of EoE food allergen triggers were compared with genotype using chi-square analysis. Primary cell cultures from EoE patients with or without the risk allele were stimulated with ovalbumin and TSLP secretion was measured by ELISA.

RESULTS

Fifty three of 309 patients were found to have no copies of the TSLP risk allele, whereas 256 patients were found to have one or more copies of the risk allele. There was an increase in the number of patients with three or more EoE food allergens among those who were either homozygous or heterozygous for the risk allele compared to those without the risk allele (P < 0.0001). This was independent of their atopic background. Primary cultures from patients homozygous for the risk allele had greater TSLP secretion than those isolated from heterozygous patients.

CONCLUSIONS

The TSLP risk allele is associated with having multiple EoE food allergen triggers. This novel EoE genotypic-phenotypic correlation may guide future treatment for those with the TSLP risk allele.