case_images: PMC6432694_01
case_images: Postoperative procedure revealed thick keratinous plug mixed with wax.
case_images: CRIOT2019-9095747.001.jpg
case_images: PMC6432694_01_CRIOT2019-9095747.001.jpg
case_images: fig1
case_images: The keratinous plug was removed, and a diagnosis of KO was established (Figure 1).
case_images: (a) Keratinous material (hematoxylin/eosin stain, x100). (b) Acellular lamellated keratin flakes (hematoxylin/eosin stain, x400).
case_images: CRIOT2019-9095747.002.jpg
case_images: PMC6432694_01_CRIOT2019-9095747.002.jpg
case_images: fig2
case_images: Pathological analysis of the removed plug revealed acellular lamellated keratin flakes and keratinous material (Figures 2(a) and 2(b)), which confirmed our diagnosis.