Tetrodotoxin is a neurotoxin, so gastrointestinal symptoms are very rare ; these described in the literature are merely nausea and vomiting. Severe complications in the gastrointestinal tract caused by tetrodotoxin have not been radiologically reported. US and CT show thickening of the gastric wall and contraction of the lumen, andupper gastrointestinal series show shortening, lobulation and irregularity of the lesser and greater curevature ofthe body and antrum similar to the findings of corrosive gastritis.