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Anosmia persisting for more than 3 months after COVID-19 (S100 immunostain)

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Immunostain in a 63-year-old woman shows strong nuclear and cytoplasmic positivity in scattered cells in structures compatible with Bowman glands (arrow). The same immunostain highlighted small nerve bundles, possibly of trigeminal origin, not illustrated in this field. (×200) (Source: Vaira LA, Hopkins C, Sandison A, et al. Olfactory epithelium histopathological findings in long-term coronavirus disease 2019 related anosmia. J Laryngol Otol 2020;134[12]:1123-7. Creative Commons Attribution 4.0 International [CC BY 4.0] license, creativecommons.org/licenses/by/4.0.)