“…However, some bodies may enter the choana posteriorly during sneezing, coughing, or emesis. 2 Conversely, the nidus of a calcification in the antrum of the maxillary sinus, referred to as an antrolith, is usually endogenous, such as a root tip, bone fragment, blood clot, or inspissated mucus, especially in the adult population. 4 5…”