Various types of wild mushrooms grow in forests and meadows, and it is common for the local population to consume them.1 It is estimated that there are over 5000 species of mushrooms worldwide. Only 20–25% of mushrooms have been named, and 3% of these are poisonous.2 Previous experience and observation make it possible to discriminate between poisonous and non-poisonous mushrooms.1 Mushroom poisoning constitutes the main portion of plant toxicities in Turkey. In addition to occurring in rural areas, gathering of mushrooms is a habit in Istanbul among villagers who have moved to the city and settled in the vicinity of a forest.3 During the four-year period from 1994 to 1998 in Sivas, Turkey, mushroom poisoning represented 10.9% of the different analyzed poisonings.4 However, these cases were not analyzed toxicologically.