Abstract
Recently coin/button shaped batteries have been widely used for watches, calculators, hearing aids and children's toys. They tend to be foreign bodies especially in the children. By now only child cases of the micro-alkaline battery fareign bodies in the nasal cavity have been reported. We report here child case and an additional an adult case. Once the micro-alkaline battery is lodged in the nasal cavity, the mucosa is severely damaged even with a prompt removal. Damaged tissues develop to darkly by brown granulation which is yielded by the sidero-deposition. The micro-alkaline battery damages the nasal mucosa by following three mechanisms; 1) low voltage current burns, 2) cauterization by leaked alkali and heavy metals and 3) contact pressure necrosis.
