Plerocercoid of Nybelinia surmenicola is found mainly in common squid. Plerocercoid of Nybelinia surmenicola is less recognized and has fewer clinical studies than Anisakis, which is highly pathogenic. However, understanding the clinical and histological features of plerocercoid of Nybelinia surmenicola is extremely important for differential diagnosis. We describe a case of plerocercoid of Nybelinia surmenicola invasion that occurred in the oral mucosa with clinical photographs and histopathological findings. The patient was a 65-year-old woman who presented with foreign bodies of the tongue and buccal mucosa with pain. Biopsy of the foreign bodies was performed to confirm the diagnosis. Symptoms improved after 1 week without active treatment except for antibiotic administration. At the same time, the search results for plerocercoid of Nybelinia surmenicola obtained from commercial squid were added to the findings of this study.
