RESUMEN
Sinistral portal hypertension (SPH), also known as left-sided portal hypertension or segmental portal hypertension, is a rare cause of upper gastrointestinal bleeding. Historically, SPH is a result of obstruction of the splenic vein often secondary to pancreatic pathology. To our knowledge, there are no reported cases of idiopathic SPH in which the findings cannot be attributed to any etiology. It is important to do a detailed workup to rule out common pathologies of SPH before making a diagnosis of idiopathic SPH. Treatment of gastric variceal bleed secondary to idiopathic SPH can be challenging and requires a multidisciplinary approach with surgery and interventional radiology. Our patient's history, examination findings, and imaging revealed no identifiable cause for SPH suggesting idiopathic SPH. We describe a case of isolated gastric variceal hemorrhage due to idiopathic SPH that was successfully treated.