Background: Secretory villous adenoma is one of the rare causes of severe secretory diarrhea, acute kidney injury and refractory electrolyte imbalance is the classic triad of this disorder named McKittrick-Wheelock syndrome. Aggressive hydro electrolyte rebalancing is often needed, and curative treatment is obtained only with complete removal of the lesion, by endoscopic resection or surgery. High clinical suspicion in patients with severe dehydration due secretory diarrhea and concomitant electrolyte imbalance is both mandatory and essential for early diagnosis and treatment before complications arise.