A Rare Case of Synchronous Lobular Capillary Hemangioma and Non-Lobular Capillary Hemangioma Arising From the Both Arytenoid Mimicking Laryngeal Granuloma

Laryngeal granuloma (LG) is a non-neoplastic lesion that mainly develops in the posterior vocal folds. It arises in response to inappropriate vocal use, and endotracheal intubation. Recently, it has been found that the coronavirus disease 2019 (COVID-19) also causes it. On the other hand, lobular capillary hemangioma (LCH) and non-LCH are two histopathological types of inflammatory hyperplasia lesions that are less common in the larynx. The LCH and non-LCH are usually caused by stimuli such as low-grade local irritation, traumatic injury. Despite the differences, as it is difficult to differentiate them from each other, surgical biopsy is necessary. It is rare to find either LCH or non-LCH in the larynx, and to our knowledge, bilateral LCH or non-LCH without endotracheal intubation history or smoking history have never been reported worldwide. Here, with a review of the literature, we report a rare case of bilateral LCH and non-LCH of arytenoid mimicking LG.