THE TENDENCY for gallium citrate Ga 67 to localize in inflammatory lesions can provide an extremely useful, noninvasive test in the septic patient.1-4 As with any diagnostic test, associated conditions that can compromise the diagnostic value of67Ga scanning should be known. We recently had a patient with pseudomembranous colitis with a colonic accumulation of67Ga, which to our knowledge, has not been previously reported. Report of a Case A 71-year-old man was in good health until 24 hours prior to admission, when he first had abdominal pain and vomiting. There was no history of hematemesis, diarrhea, melena, or bright red blood originating from the rectum. On physical examination, the patient had a temperature of 38.5 C (101.3 F) and a distended abdomen with left lower quadrant rebound tenderness. Results of the rest of the examination were unremarkable. All laboratory values were within normal limits. An abdominal