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INTRODUCTION — Esophageal eosinophilia has been described in association with eosinophilic gastroenteritis, an uncommon condition that can cause a range of symptoms, including malabsorption, dysmotility, and ascites, depending upon the layer of the intestinal tract that is involved. When the gastrointestinal eosinophilia is limited to the esophagus and is accompanied by characteristic symptoms, it is termed eosinophilic esophagitis. Eosinophilic esophagitis is an increasingly recognized cause of dysphagia and possibly heartburn that is unresponsive to antireflux measures.
The management of eosinophilic esophagitis includes dietary, pharmacologic, and endoscopic interventions . The approach to patients with eosinophilic esophagitis is based primarily on clinical experience, case series, and small controlled trials. In addition, it is uncertain whether treatment of symptoms alone is sufficient or if resolution of the eosinophilic inflammation is required. The goal of therapy in patients with eosinophilic esophagitis is symptomatic relief, ideally with histological improvement in esophageal eosinophilia. In addition, for pediatric patients, therapy aims to restore normal growth and development.
Commonly used treatments include:
●Elimination and elemental diets to decrease allergen exposure.
●Acid suppression to treat gastroesophageal reflux disease, which may mimic or contribute to eosinophilic esophagitis. In addition, a subset of patients respond clinically and histologically to proton pump inhibitors. Such patients have been referred to as having proton pump inhibitor responsive esophageal eosinophilia.
●Topical glucocorticoids to decrease esophageal inflammation.
●Esophageal dilation to treat strictures.
Other treatments that have been studied include systemic glucocorticoids, antihistamines, immunosuppressants, and immunomodulators.
This topic will review the treatment of eosinophilic esophagitis. The approaches outlined are consistent with a 2011 consensus statement and the 2013 American College of Gastroenterology clinical guidelines [2,3]. The pathogenesis, clinical manifestations, and diagnosis of eosinophilic esophagitis in adults and children are discussed separately. The pathogenesis, clinical manifestations, and diagnosis of eosinophilic esophagitis in adults and children are discussed separately. (See "Eosinophilic esophagitis (EoE): Genetics and immunopathogenesis" and "Clinical manifestations and diagnosis of eosinophilic esophagitis".)
DIETARY THERAPY — Dietary therapy is an effective first-line treatment for eosinophilic esophagitis in children and adults. Dietary therapy is based upon the observation that patients with eosinophilic esophagitis have high rates of food allergies, and that those allergies may contribute to the development of eosinophilic esophagitis. (See "Eosinophilic esophagitis (EoE): Genetics and immunopathogenesis", section on 'Role of the immune system and environmental factors'.)
The appeal of the dietary approach is that it potentially offers an effective non-pharmacologic treatment. On the other hand, allergen avoidance with elimination and elemental diets poses a risk of nutritional deprivation, can be difficult for patients and families (particularly if nasogastric feedings or gastrostomy tubes are required), can lead to psychological problems, and may lead to unnecessary food aversion. Other important factors that may influence the decision include costs (often not borne by insurance providers), convenience, ease of adherence, and patient/family preferences. In addition, relapse upon discontinuation of the diet is common. When used, elemental and elimination diets should be administered under the supervision of a registered dietician.
We refer both adults and children to an allergist with expertise in the evaluation of food allergies to guide dietary therapy, assist in the treatment of eosinophilic esophagitis, and identify and treat extraesophageal atopic conditions. We suggest avoidance of known allergens (both food and environmental) for patients in whom specific allergies can be identified after discussion of the pros and cons of the dietary approach. Dietary management of eosinophilic esophagitis is discussed in detail, separately. (See "Diagnostic evaluation of food allergy" and "Dietary management of eosinophilic esophagitis".)
Acid suppression — The relationship between gastroesophageal reflux disease (GERD) and eosinophilic esophagitis is unclear. GERD may be a mimic of eosinophilic esophagitis, coexist with it , or contribute to it. Conversely, eosinophilic esophagitis may contribute to GERD . The diagnosis of eosinophilic esophagitis should generally include demonstration of persistent esophageal eosinophilia after a two-month course of proton pump inhibitor (PPI) (or with a normal pH study) . PPIs may benefit patients with esophageal eosinophilia either by reducing acid production in patients with co-existent GERD, or by other yet undefined anti-inflammatory mechanisms [6,7]. (See "Clinical manifestations and diagnosis of eosinophilic esophagitis", section on 'Distinction from GERD' and "Clinical manifestations and diagnosis of eosinophilic esophagitis", section on 'PPI-responsive esophageal eosinophilia'.)
PPI-responsive esophageal eosinophilia — A subset of patients whose clinical, endoscopic, and histologic features are compatible with EoE responds to a trial of a PPI [8-11]. The pathophysiology of underlying PPI-responsiveness is unsettled. There are no methods to identify such patients with PPI-responsive EoE (PPIREE) based on clinical or histologic features, although experimental diagnostic approaches are being explored . As a result, it is important that patients with suspected EoE undergo a trial of a PPI before proceeding with other therapeutic options.
The natural history of patients with PPIREE is incompletely understood. Some patients appear to develop more classical EoE, while others maintain a clinical and histologic response. Still others appear to have improvement in symptoms despite having persistent esophageal eosinophilia. It is also possible that patients with PPIREE may respond to dietary interventions, suggesting that the PPIs are in some way mitigating an underlying allergic diathesis .
Until further consensus is achieved, PPIs might be considered as a form of treatment for esophageal eosinophilia and should be considered an initial option in patients suspected of having EoE. As a result, patients suspected of having EoE should undergo a trial of a PPI (typically double dose for eight weeks) before proceeding with other therapeutic approaches.
Topical glucocorticoids — Most patients with eosinophilic esophagitis respond to topical glucocorticoids as demonstrated by a decrease in eosinophil counts [4,14,15]. No formulation of topical glucocorticoids has been approved specifically for eosinophilic esophagitis. Fluticasone, budesonide have been best studied. We treat most adult patients with swallowed budesonide or fluticasone [4,14,16-21]. Symptoms often recur when steroids are discontinued . (See "Major side effects of inhaled glucocorticoids" and "Major side effects of systemic glucocorticoids".)
Randomized controlled trials have not consistently demonstrated an improvement in dysphagia with topical glucocorticoids in adults [15,23]. It is unclear if this is due to differences in patient selection, definitions of symptom response, steroid formulations and duration of treatment, or dietary modification that may have resulted in a higher placebo response rate .
Predictors of response to glucocorticoids are poorly understood. In a retrospective cohort study that included 221 patients with eosinophilic esophagitis who received topical glucocorticoids, endoscopic, symptomatic, and histologic improvement were noted in 71, 79, and 57 percent of patients who underwent a repeat endoscopy approximately eight weeks after treatment . On multivariate logistic regression analysis, esophageal narrowing that required dilation at baseline endoscopy was an independent predictor of a lack of response to topical glucocorticoid therapy and abdominal pain was a predictor of response to therapy (OR nonresponse 2.9, 95% CI 1.4-6.3 and 0.3, 95% CI 0.1-0.8, respectively). Higher baseline levels of tryptase and eotaxin-3, but not major basic protein, were associated with a response to topical glucocorticoids.
Fluticasone propionate — Fluticasone is administered using a metered dose inhaler without a spacer. The medication is sprayed into the patient’s mouth and then swallowed. Patients should not inhale when the medication is being delivered and they should not eat or drink for 30 minutes following administration.
The optimal dose has not been established. Our approach is based upon the patient's age:
●Children from one to four years of age: 44 mcg inhaler, two sprays twice daily.
●Children from 5 to 10 years of age: 110 mcg inhaler, two sprays twice daily.
●Patients ≥11 years of age (including adults): 220 mcg inhaler, two sprays twice daily.
●Clinical experience suggests that response rates may increase with a higher dose of fluticasone. A 2013 guideline issued by the American College of Gastroenterology (ACG) suggested that the dose in children can range from 88 to 440 mcg/day in divided doses, while the dose in adults can range from 880 to 1760 mcg/day in divided doses .
Treatment is generally well tolerated and patients who are destined to respond tend to do so quickly (within one week and often within one to two days). In patients who respond, we continue treatment for eight weeks. Patients frequently relapse when treatment is stopped, with reported relapse rates of 14 to 91 percent [4,22,26,27]. For patients who relapse, we treat and discuss maintenance topical glucocorticoids or a trial of a dietary approach. For patients who do not respond to fluticasone, options include a higher dose of fluticasone, a change to oral viscous budesonide, or a dietary approach.
Representative studies of fluticasone for eosinophilic esophagitis have shown the following:
●A series in adults included 21 patients who were treated with fluticasone propionate 220 mcg twice daily . All patients had relief of dysphagia that lasted a minimum of four months. Relief often occurred within a few days after beginning treatment. Three patients (14 percent) relapsed and required additional therapy. Histologic outcomes were not assessed. However, in a later series, clinical improvement was associated with a significant decrease in esophageal eosinophil counts . The only adverse effect noted was dry mouth.
●Similar benefits have been observed in children, although different doses and dosing intervals have been used [14,17,21,27]. The largest controlled trial included 36 children who were randomly assigned to swallowed fluticasone (880 mcg/day in two divided doses) or placebo for three months . Histologic remission was observed significantly more often in the fluticasone group (50 versus 9 percent).
Side effects that have been reported with the use of fluticasone for eosinophilic esophagitis include candidal esophagitis [17,27] and herpes esophagitis was noted in a case report . In addition, in diseases other than eosinophilic esophagitis, inhaled doses of fluticasone higher than 440 mcg/day have been associated with systemic side effects including cataracts, impaired growth in children, and adrenal suppression [29-31]. It is not known if the risk of these side effects is reduced when fluticasone is swallowed and undergoes first-pass metabolism in the liver.
Budesonide — Budesonide has been evaluated in case series and randomized trials and appears to be effective for treating eosinophilic esophagitis [23,32-38]. Budesonide can be administered using a nebulizer and patients are then instructed to swallow the accumulated liquid or as an oral viscous slurry (1 mg daily for children under the age of 10 years, and 2 mg daily for older children and adults). Viscous budesonide can be compounded by mixing two or four 0.5 mg/2 mL Pulmicort Respules with sucralose (Splenda; 10 1-gram packets per 1 mg of budesonide, creating a volume of approximately 8 mL) . Patients should not eat or drink for 30 minutes after taking the budesonide suspension.
Studies of budesonide for eosinophilic esophagitis have shown the following:
●In a randomized trial, 22 patients with eosinophilic esophagitis were treated with budesonide, either nebulized and then swallowed, or as an oral viscous slurry . Although patients who received the viscous slurry had a higher duration of mucosal contact with budesonide and lower eosinophil count, there was no significant difference in dysphagia symptom scores which improved in both groups.
●In a randomized trial with 24 children, the response rate, defined as an eosinophilic count ≤6/hpf was significantly higher with oral viscous budesonide (87 versus 0 percent with placebo) . Symptoms, endoscopic findings, and histologic features improved after treatment. Patients in both groups were also treated with a PPI. Since there were no responders in the placebo group, monotherapy with a PPI had no benefit.
●Similar benefits have been described in studies in adults [34,35,38]. In a randomized trial, 36 adults and adolescents with active eosinophilic esophagitis were randomized to budesonide 1 mg twice daily or placebo for 15 days . The budesonide was administered using a nebulizer and patients were instructed to continuously swallow the accumulated liquid. Patients who received budesonide were more likely to have significant improvements in dysphagia compared with those who received placebo (72 versus 22 percent). In addition, patients treated with budesonide showed histologic improvement, whereas those treated with placebo did not.
●In a randomized trial, 93 adolescents and adult patients with active eosinophilic esophagitis and dysphagia were assigned to budesonide oral suspension (2 mg) or placebo twice daily for 12 weeks . Treatment with budesonide oral suspension resulted in symptomatic, endoscopic, and histologic improvement as compared with placebo. Treatment related adverse events were similar in the two groups.
Ciclesonide — Ciclesonide, a topical glucocorticoid with less systemic absorption than fluticasone, has been evaluated in small case series [41-43]. In one report, four children who had either failed therapy with fluticasone or dietary restriction, or whose parents were concerned about steroid exposure, were treated with swallowed topical ciclesonide (80 or 160 mcg, two sprays twice daily) for two months . Symptoms resolved in all four patients and there was a significant decrease in eosinophil counts in both proximal and distal esophageal biopsy specimens at two months (proximal: 71±25.5 versus 1.8±2 eosinophils/hpf before and after treatment; distal: 76.3±33 versus 0.75±1.5 eosinophils/hpf before and after treatment). Further studies are needed.
Maintenance therapy — Maintenance therapy with topical steroids and/or dietary restriction should be considered for all patients, but particularly in those with severe dysphagia or food impaction, high-grade esophageal stricture, and rapid symptomatic/histologic relapse following initial therapy . The lack of symptoms does not reliably predict the absence of disease activity [44-46].
Optimal approaches to maintenance therapy have not been well established. Thus, the approach should consider the clinical setting, patient preferences, and available resources. Long-term dietary restriction is effective in maintaining remission in patients in whom dietary triggers have been identified. In patients unwilling to maintain a dietary approach and those in whom a trigger cannot be identified, topical glucocorticoids can be used at the lowest dose that allows patients to remain asymptomatic. In adults, a guideline issued by the ACG suggests a maintenance dose of fluticasone (880 mcg daily in divided doses) or oral viscous budesonide (1 mg daily). (See 'Dietary therapy' above and 'Fluticasone propionate' above.)
One of the only controlled trials of maintenance therapy included 28 adults with eosinophilic esophagitis in clinical remission who were randomly assigned to twice daily budesonide (0.25 mg) or placebo for a total of 50 weeks . The eosinophil load increased over the course of treatment in both groups, but the increase was less in those treated with budesonide (from 0.4 to 32 eosinophils/hpf) than in those treated with placebo (from 0.7 to 65 eosinophils/hpf).
Over the course of the study, patients treated with budesonide did not report a statistically significant increase in symptoms, whereas those who received placebo did. At the end of the study, patients who received budesonide were more likely to be in clinical remission (64 versus 36 percent). Patients treated with budesonide also showed evidence of esophageal remodelling. At baseline, patients with eosinophilic esophagitis had esophageal walls that were twice as thick as those seen in healthy controls (mean thickness 4.2 versus 2.2 mm). After treatment, patients in the budesonide group showed decreases in the thickness of all wall layers, though only the decrease in the thickness of the mucosa was statistically significant. No adverse events were noted.
Topical versus systemic glucocorticoids — Systemic glucocorticoids have a limited role in eosinophilic esophagitis, except possibly in patients with severe disease in whom other approaches are not feasible . Oral prednisone may be slightly more effective than topical fluticasone for the treatment of eosinophilic esophagitis, but the degree of benefit probably does not justify routine use of prednisone considering the greater likelihood of side effects . Furthermore, because of the high relapse rate, chronic or repeated therapy may be needed, which may also support the preferential use of swallowed fluticasone. If systemic steroids are used, the typical dose is 1 to 2 mg/kg/day in divided doses (maximum 60 mg per day).
A randomized trial compared topical with systemic glucocorticoids . The trial included 80 children with eosinophilic esophagitis who were randomly assigned to oral prednisone or swallowed fluticasone. Almost all of the patients, regardless of treatment, were symptom free by four weeks. Histologic improvement was seen to a greater degree in the prednisone group. Relapse was observed in 45 percent of patients in both groups within 24 weeks of stopping therapy. Glucocorticoid side effects occurred in 40 percent of patients in the prednisone arm, whereas candidal esophagitis was seen in 15 percent in the fluticasone arm.
ESOPHAGEAL DILATION — Dilation of esophageal strictures is effective for relieving dysphagia, but has no effect on underlying inflammation [48,49]. It is often reserved for patients who have failed more conservative therapy, but may be required as initial therapy in patients with high-grade strictures [3,50]. We generally reserve dilation for patients with strictures or rings who have not responded to medical therapy.
Dilation should be performed carefully since it has been associated with deep mucosal tears and esophageal perforation [51-54]. It has been recommended that the progression of dilation per session be limited to 3 mm or less . Because of this, multiple dilations are often required to attain a goal esophageal diameter of 15 to 18 mm [48,55,56]. Patients should be forewarned of the risks of esophageal dilation including chest pain, which occurs in 75 percent of patients, and bleeding .
Whether patients with eosinophilic esophagitis are at higher risk of perforation due to esophageal dilation than other patients undergoing dilation is not clear. Older studies suggested that patients with eosinophilic esophagitis are at increased risk for perforation, with perforation rates of 5 to 7 percent . More recent studies suggest that the rate of perforation is considerably lower [48,52,58,59]. A 2013 meta-analysis that included 860 patients, of whom 525 underwent at least one dilation, and a total of 992 dilations found that there were only three perforations (2 percent, 95% CI 0-0.9) and one hemorrhage (0 percent, 95% CI 0-0.8) . Clinical improvement with dilation occurred in 75 percent of patients (95% CI 58-93). Similar findings have been reported in children .
Tearing and perforation can occur without perceived resistance when passing a dilator or the endoscope (picture 1) . As a result, it may be reasonable to gently inspect the esophagus after passing each dilator. Rigid endoscopy has been associated with a high rate of perforation and should be avoided . The use of glucocorticoids before dilation has not been extensively studied ; it may offer a small benefit prior to dilation by diminishing inflammation. (See "Management of benign esophageal strictures", section on 'Complex strictures'.)
EXPERIMENTAL AND INEFFECTIVE TREATMENTS — Other treatments for eosinophilic esophagitis have been examined.
Prostaglandin D2 receptor antagonist — Chemoattractant receptor-homologous molecule on Th2 cells (CRTH2) is a receptor expressed by Th2 cells, eosinophils, and other inflammatory cells that mediates chemotaxis of these cells in response to prostaglandin D2. OC000459 is a selective, orally bioavailable, CRTH2 antagonist. In a randomized controlled trial, 26 adults with steroid-dependent or steroid-refractory eosinophilic esophagitis were randomly assigned to treatment with OC000459 (100 mg twice daily) or placebo . At eight weeks, treatment with OC000459, but not placebo, was associated with a modest but significant reduction in esophageal eosinophil counts and an improvement in symptoms as compared with baseline.
Antihistamines and cromolyn — Little benefit has been seen in patients treated with medications aimed at controlling allergies, including antihistamines and cromolyn sodium (a mast cell stabilizer) [65,66].
Montelukast — Initial experience suggested that montelukast (a leukotriene inhibitor that has been used in eosinophilic gastroenteritis) may be helpful for symptom reduction in patients with eosinophilic esophagitis but subsequent experience has been mixed for either induction or maintenance of remission [67-72]. Thus, its role, if any, remains unclear.
Mepolizumab — Mepolizumab is a humanized monoclonal antibody against interleukin (IL)-5, which has a central role in eosinophil recruitment. (See "Eosinophilic esophagitis (EoE): Genetics and immunopathogenesis", section on 'Role of the immune system and environmental factors'.) Studies of mepolizumab have had variable results [73-75]. As a result, its role is uncertain.
Reslizumab — Reslizumab is an IL-5 neutralizing antibody that is undergoing clinical trials in eosinophilic esophagitis. In a controlled trial involving 226 children and adolescents with eosinophilic esophagitis, there was a significant reduction in peak eosinophil counts compared with placebo (59, 67, and 64 percent for the three doses tested versus 24 percent for placebo) . However, all treatment groups had significant improvement in symptoms as assessed by a physician global assessment score and the differences were not significantly different than placebo. Thus, its role remains uncertain.
Anti-IgE monoclonal antibody — In a report of two patients with multiple food allergies and eosinophilic esophagitis, treatment with the anti-IgE monoclonal antibody omalizumab was associated with an improvement in allergic symptoms but not in endoscopic or histologic features of eosinophilic esophagitis .
PROGNOSIS — While there are limited data regarding the natural history of eosinophilic esophagitis, patients should be counseled that the disease is chronic. Untreated, patients may remain symptomatic or have episodic symptoms and that there is a high likelihood of symptom recurrence after discontinuing treatment [3,22,79]. The long-term prognosis of eosinophilic esophagitis is unclear, but EoE does not appear to significantly shorten lifespan.
Whether the disease persists into adulthood in affected children has not been extensively studied, although the available data suggest that it does. In a report of 620 children evaluated over a 14-year period, eosinophilic esophagitis persisted, with only 10 percent developing tolerance to their food allergies . No children progressed to other gastrointestinal diseases.
In adults, long-term observations suggest that the disease may progress to a fibrostenotic stage in which the predominant symptom is intermittent dysphagia . Patients with extreme narrow caliber esophagus, a subtype of eosinophilic esophagitis in which the esophagus cannot be traversed with an adult endoscope, often require multiple dilations, are more refractory to treatment with steroids, and have lower response rates to treatment .
However, the proportion of patients with progressive disease is unknown. One of the largest natural history studies in adults focused on 30 adults who were followed for an average of seven years . Patients underwent a follow-up examination consisting of a structured interview, laboratory testing, and an upper endoscopy with biopsies. The majority of patients had persistent dysphagia. Attacks of dysphagia were more common in patients who had peripheral eosinophilia. Eosinophilic infiltration persisted in all symptomatic patients, but the degree of tissue eosinophilia appeared to decrease. The inflammatory process remained confined to the esophagus without gastric or duodenal involvement. No cases of dysplasia or esophageal malignancy were observed.
PATIENT ADVOCACY — The American Partnership for Eosinophilic Disorders is an advocacy group for patients with eosinophilic gastrointestinal diseases.
INFORMATION FOR PATIENTS — UpToDate offers two types of patient education materials, "The Basics" and "Beyond the Basics." The Basics patient education pieces are written in plain language, at the 5th to 6th grade reading level, and they answer the four or five key questions a patient might have about a given condition. These articles are best for patients who want a general overview and who prefer short, easy-to-read materials. Beyond the Basics patient education pieces are longer, more sophisticated, and more detailed. These articles are written at the 10th to 12th grade reading level and are best for patients who want in-depth information and are comfortable with some medical jargon.
Here are the patient education articles that are relevant to this topic. We encourage you to print or e-mail these topics to your patients. (You can also locate patient education articles on a variety of subjects by searching on "patient info" and the keyword(s) of interest.)
●Basics topic (see "Patient education: Eosinophilic esophagitis (The Basics)")
SUMMARY AND RECOMMENDATIONS — The management of eosinophilic esophagitis includes pharmacologic, endoscopic, and dietary interventions. Our recommendations below are consistent with consensus guidelines (table 1 and table 2).
●We refer both adults and children to an allergist with expertise in the evaluation of food allergies. We suggest avoidance of known allergens (both food and environmental) for patients in whom specific allergies can be identified after discussion of the pros and cons of the dietary approach as described above (Grade 2C). (See 'Dietary therapy' above.)
●Dietary approaches have been best studied in children, in whom they are used routinely as an option for primary therapy. Emerging data in adults suggest a six-food elimination diet can improve symptoms and esophageal eosinophilia and help identify causative foods. As a result, some authorities have begun recommending this approach as a primary option for their adult patients. If a dietary approach is taken, it is important to coordinate it with a nutritionist since elimination and elemental diets can result in important restrictions of calories and nutrients. (See 'Dietary therapy' above and "Dietary management of eosinophilic esophagitis".)
Fluticasone is administered using a metered dose inhaler without a spacer. The medication is sprayed into the patient’s mouth and then swallowed. Patients should not use a spacer or inhale while the medication is being delivered, and they should not eat or drink for 30 minutes following administration. The dose used varies with the age of the patient.
We suggest initial treatment for six to eight weeks (Grade 2C). Optimal strategies after initial treatment are unsettled. Thus, the decision to continue treatment should be individualized. Because symptoms and esophageal eosinophilia almost universally return when treatment is discontinued, we suggest ongoing treatment, whether medical or nutritional (Grade 2C). Some authorities treat on an as-needed basis. Such an approach is particularly useful in patients who have identifiable, seasonal triggers. Others use the lowest dose possible of topical glucocorticoids that allow patients to remain asymptomatic. Our approach is to continue nutritional therapy, using topical glucocorticoids as needed in doses and intervals that keep patients asymptomatic.
Treatment is generally well tolerated. However, worsening of dysphagia during treatment should alert to the possibility of candidal esophagitis.
●In patients who do not respond to topical fluticasone, we suggest either an elimination diet (if not already tried) or a trial of topical budesonide (Grade 2C). (See 'Budesonide' above and 'Dietary therapy' above and "Dietary management of eosinophilic esophagitis", section on 'Elimination diets'.)
●Adult patients with esophageal rings or strictures may require dilation. Dilation is associated with mucosal tears and esophageal perforation and thus should be performed extremely cautiously. We suggest that, if possible, dilation be avoided until patients have been given a course of fluticasone, which may relieve dysphagia and thus avoid the need for dilation (Grade 2C). Dilation has generally not been needed in children in most reports. (See 'Esophageal dilation' above.)
●While a two-month course of proton pump inhibitor therapy followed by endoscopy and biopsy (or with a normal pH study) are recommended to establish the diagnosis of eosinophilic esophagitis, the role of acid suppression in the treatment of established eosinophilic esophagitis is unclear. Acid suppression is reasonable in patients in whom reflux is suspected to be contributing to symptoms because some patients respond clinically and histologically, we suggest a trial of a proton pump inhibitor except in patients who have already tried one and did not respond (Grade 2B). (See 'Acid suppression' above and "Clinical manifestations and diagnosis of eosinophilic esophagitis", section on 'Diagnosis'.)
●Whether patients should undergo surveillance endoscopy is unclear. Although a malignant potential has not been reported, follow-up has generally been short. We generally repeat upper endoscopy for patients in whom symptoms have changed or who require esophageal dilation.
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