External auditory canal osteoma

Case contributed by Mohammad Taghi Niknejad
Diagnosis almost certain

Presentation

Left external auditory canal mass on physical examination

Patient Data

Age: 20 years
Gender: Male

Pedunculated bony mass arising from the anterior wall of the left external auditory canal and almost obliterating the canal.

Case Discussion

The findings are consistent with left external auditory canal osteoma.

Osteomas of the external auditory canal are considered clinically to be discrete, pedunculated bone lesions arising along the tympano-squamous suture while exostoses of external auditory canal are broad based elevations of bone usually multiple and bilaterally symmetric, involving the tympanic bone.

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