Can exostosis of the external auditory canal be malignant?

Exostosis of the external auditory canal can potentially become malignant.

External auditory canal exostosis is a nodular protrusion that may result from trauma or chronic inflammatory stimulation, commonly occurring in areas such as the external auditory canal, tympanic cavity, and mastoid. In the early stages, most exostoses are benign, small in size, and asymptomatic, usually requiring no specific treatment—regular monitoring is sufficient. However, if the growth reaches a certain size, it may undergo malignant transformation, causing symptoms such as ear fullness, pressure, pain, or even narrowing of the external auditory canal, leading to hearing loss. In such cases, surgical intervention under medical guidance is generally required. It is important to properly care for the surgical site postoperatively to prevent wound infection.

In addition, patients should maintain a bland diet, limit intake of spicy and irritating foods, and schedule regular follow-up visits after treatment.