The use of acetone to dissolve a Styrofoam impaction of the ear.

Foreign bodies in the ear occasionally thwart conventional means of removal. Styrofoam can be particularly problematic because it can be compressed and become tightly impacted in an ear canal. Furthermore, Styrofoam is friable and tends to fragment with usual removal methods. We report the case of a 6-year-old girl who was referred from another tertiary care hospital after failed efforts to remove a painfully impacted piece of Styrofoam from her left ear canal. Instillation of the organic solvent acetone into the ear canal was well tolerated and caused rapid and near-complete dissolution of the Styrofoam impaction. This is the first reported case of organic solvent dissolution of an otic foreign body. Ototoxic considerations are discussed as is a method for safe acetone instillation that minimizes the amount of acetone introduced into the ear canal.