S4373 Type II Achalasia in an Adult With Sjögren’s Syndrome and Multiple Autoimmune Comorbidities: A Rare Case Report

Introduction: Achalasia is a rare esophageal motility disorder characterized by impaired lower esophageal sphincter relaxation and loss of peristalsis. Sjögren’s syndrome, a chronic autoimmune disease affecting exocrine glands, commonly causes xerostomia and oropharyngeal dysphagia, but is rarely associated with achalasia. While the association between achalasia and juvenile Sjögren’s syndrome has been described in several cases, only a single adult case has been reported. We present a case of type II achalasia in a woman with Sjögren’s and multiple autoimmune comorbidities. Case Description/Methods: A 66-year-old woman with Sjögren’s syndrome, multiple sclerosis, myasthenia gravis, prediabetes, hyperthyroidism, gastroesophageal reflux disease, and history of colonic adenomas presented with 1 month of progressive dysphagia to solids, liquids, and pills associated with cough, daily regurgitation, and a 13-pound weight loss requiring her to modify her diet to soft foods and nutritional supplements. Her exam and labs were unremarkable. Initial chest radiography showed a markedly dilated esophagus with an air-fluid level with no evidence of pneumonia. Computed tomography scan confirmed marked dilation of the thoracic esophagus with tapering at the gastroesophageal junction, without mass or lymphadenopathy. Barium esophagram revealed a dilated esophagus, absent peristalsis, and a narrowed gastroesophageal junction, raising suspicion for achalasia. Upper endoscopy demonstrated diffuse esophageal dilation, congestion, friability, and sloughing, and atrophic gastric mucosa and erosions (biopsies negative for H. pylori.). Despite dietary modifications, she continued to lose weight. High-resolution esophageal manometry revealed panesophageal pressurization in all swallows and median integrated relaxation pressure of 15.1 mm Hg, consistent with type II achalasia and corresponding with her symptoms and findings on esophagram and endoscopy. Due to suboptimal manometry catheter placement likely resulting in an underestimate of the integrated relaxation pressure, the patient will undergo EndoFLIP™ for further confirmation of Type II Achalasia prior to definitive intervention. Discussion: Although dysphagia is common in adult Sjögren’s syndrome, the association with achalasia is rare. This case highlights the importance of considering achalasia in adult Sjögren’s patients with unexplained or progressive dysphagia. Comprehensive evaluation is essential for accurate diagnosis and management strategy.