Background Although foreign bodies are more common in children, there are several reports of denture foreign bodies in the literature. Here we report on one such case which went unidentified for at least 7 days, causing laryngeal ulceration. Case report A 64-year-old woman presented to our emergency department with a likely aspiration pneumonia on a background of multiple sclerosis with chronic dysphagia and multiple similar presentations in the past. She was noted to have a “gurgly” voice and breathing. An endoscopic swallow assessment was performed on day 7 of admission revealing the patient’s upper full denture overlying the laryngeal inlet causing ulceration of the arytenoids, aryepiglottic folds and epiglottis. The foreign body was removed using a Magill forceps. Repeated swallow assessment three days later showed significant improved swallow back to baseline levels. Discussion Foreign body ingestion most commonly occurs in adults with neurologic impairment, with dentures being the most common cause. When impacted, the most common symptoms are dysphagia, odynophagia and hypersalivation. These symptoms are often underappreciated resulting in delayed diagnoses, as in this case. It is important for clinicians who care for patients with pre-existing neurological impairments to be aware of this potential cause for morbidity. Conclusion Dentures are the most common cause of foreign body ingestion in adults, and are often underappreciated leading to delayed diagnosis. We report on one such delayed diagnosis of laryngeal denture foreign body causing laryngeal ulceration. It is important for clinicians to be aware of this potential cause for dysphagia, especially in patients with pre-existing neurological impairment.