Idiopathic Isolated Colonic Varices: An Extremely Rare Condition.

Colonic varices are an incredibly rare phenomenon to begin with; however, they are even more unusual when isolated and occurring in the absence of common comorbidities, like portal hypertension or portal vein thrombosis. We present a case of a 71-year-old female, who was asymptomatic and referred to gastroenterology for a routine colorectal cancer screening. The patient was ultimately found to have this anomalous condition when colonic varices were first identified on colonoscopy. Since these varices did not result from any obvious etiology, they were determined to be idiopathic colonic varices, an especially unusual presentation.