A case of rectal villous tumor with shortness of breath in a 70-year-old woman-Uncommon symptom of McKittrick-Wheelock syndrome.

Diagnosis of McKittrick-Wheelock syndrome (MWS) is sometimes difficult because the symptoms are sometimes nonspecific. Physician should be considered MWS in case of severe hyponatremia and hypokalemia are accompanied by prolonged mucous diarrhea.