Squamous papilloma in the external auditory canal: A common lesion in an uncommon site

Figure 1 Pre-operative findings of the left external auditory canal. A multiple granular mulberry-like neoplastic lesion located on the superior aspect of left external auditory canal.

Figure 2 Histopathological findings (hematoxylin and eosin, × 200). Histopathological examinations revealed the characteristic features of hyperkeratosis, papillomatosis, parakeratosis, acanthosis and koilocytosis. Koilocytosis indicates diseased cells caused by human papilloma virus infection. Characteristic squamous cells containing peri-nuclear clearing with condensation of peripheral cytoplasm are the typical pictures of koilocytic cells. Irregular, raisin-shaped nucleus (short arrow) and bi-nuclei cells (long arrow) may be present.

Figure 3 Post-operative follow up conditions. One month after the surgical removal was performed. The wound healed well without scar contracture or recurrence.