“…3 While the majority of CIPO patients are idiopathic, many secondary etiologies cause CIPO, including the following: infectious (Chagas), neurologic (stroke, Parkinson's disease, Hirschsprung's disease), paraneoplastic (carcinoid tumors, central nervous system [CNS] neoplasms, leiomyosarcomas), endocrine (diabetes, hypothyroidism, and hypoparathyroidism), genetic (Duchenne muscular dystrophy, mitochondrial, neurogastrointestinal, encephalomyopathy, and other neuronal or SMC mutations), autoimmune diseases (systemic sclerosis, SLE, and dermatomyositis), or iatrogenic causes (radiation, antidepressants, antiparkinsonian agents, and antineoplastics). 1,3,4 Diagnosis of CIPO is challenging as it inconsistently affects parts of the gastrointestinal tract. 3 Small bowel involvement causes weight loss and vomiting; large bowel involvement causes abdominal pain, distension, and constipation; and esophageal involvement causes dysphagia and gastroesophageal reflux.…”