case_images: PMC8012142_01
case_images: A brownish, firm, papillomatous, painless mass in the cartilaginous posterior portion of the left external auditory canal.
case_images: CRIOT2021-5539286.001.jpg
case_images: PMC8012142_01_CRIOT2021-5539286.001.jpg
case_images: fig1
case_images: On physical examination, a brownish, firm, papillomatous, painless mass was observed in the cartilaginous posterior portion of the left EAC (Figure 1).
case_images: Temporal bone computed tomography revealing a 0.5 x 0.5 cm low-density mass in the cartilaginous portion of the left external auditory canal and low-density material with adjacent bony erosion medial to the mass: (a) axial view; (b) coronal view.
case_images: CRIOT2021-5539286.002.jpg
case_images: PMC8012142_01_CRIOT2021-5539286.002.jpg
case_images: fig2
case_images: On temporal bone computed tomography, a 0.5 x 0.5 cm low-density mass was observed in the cartilaginous portion of the left EAC, and a low-density material with adjacent bony erosion was observed medial to the mass (Figure 2).
case_images: Surgical specimen of the 0.5 x 0.5 cm, brownish, firm, papillomatous mass (a). Histopathologic image showing dermal nests and cords of nevus cells with no junctional activity (hematoxylin-eosin, x200) (b). Postoperative endoscopic view of the left external auditory canal showing no recurrence and no bony erosion (c).
case_images: CRIOT2021-5539286.003.jpg
case_images: PMC8012142_01_CRIOT2021-5539286.003.jpg
case_images: fig3
case_images: In microscopic surgery, the 0.5 x 0.5 cm, brownish, firm, papillomatous mass was excised completely (Figure 3(a)), and the wax and keratin material medial portion of the EAC behind the mass was removed. Dermal nests and cords of nevus cells showed no junctional activity (Figure 3(b)). One year and one month later, there was no recurrence and no bony erosion (Figure 3(c)).