Prolapse, or rectal prolapse, refers to a condition in which the rectum of the anal canal prolapses outside the anus due to exenteration. Gastrointestinal dilatation with prolapse is seen in some patients with elastic pseudoxanthomatosis. The dilatation is caused by gas accumulation in the stomach and intestines due to abnormal digestive function. Pseudoxanthomatosis elastica is a systemic elastic fiber disorder and can be divided into the following categories: autosomal dominant type I: orange peel-like appearance on the flexors of the extremities with severe circulatory disorders such as hypertension, angina pectoris, intermittent claudication, and ocular symptoms. Autosomal dominant type II: Characteristic manifestations include yellowish papules, hypertension, intermittent claudication, ocular symptoms, increased skin extension and high palatal arch. Autosomal recessive type I: Characteristic manifestations include rash, increased skin extension, hypertension, ocular symptoms such as blue sclera and high palatal arches, and generalized joint laxity. Female cases tend to have upper gastrointestinal bleeding. Autosomal recessive type II: only increased skin extension without rash and systemic visceral comorbidities.