Transoral traumatic perforation of the pyriform sinus by a marker pen: report of an infant case.

Background: Perforation of the pyriform sinus, included in hypopharyngeal injury, is a rare condition typically caused by iatrogenic factors. We present a case of an infant who developed deep cervical and mediastinal abscesses due to a traumatic pyriform sinus perforation caused by accidentally falling with a marker pen in the mouth.

Case Presentation: An 11-month-old healthy male infant fell on a trampoline with a marker pen in his mouth. The patient developed swelling in the neck 3 h after the incident and was taken to a regional general hospital. Although a laryngoscopy showed no perforation in the oral cavity or posterior pharynx, a computed tomography (CT) scan revealed significant emphysema extending from the cervix to the mediastinum. The patient was transferred to our tertiary hospital and admitted to the intensive care unit, where he was mechanically ventilated, and antibiotic therapy was initiated. On day 3 of admission, a CT scan revealed deep abscesses in the cervical and upper posterior mediastinum with pneumomediastinum. Although his respiratory status stabilized and he was temporarily weaned, the fever recurred. Pharyngoesopagography revealed significant leakage of contrast from the left pyriform sinus to the mediastinum. Consequently, surgical drainage of the abscess was performed on day 10. Two low-pressure continuous suction drains were placed, one in the posterior mediastinum and the other close to the pyriform sinus. Pharyngoesophagography on postoperative day (POD) 7 demonstrated decreased contrast leakage into the posterior mediastinum. The patient was initiated on enteral nutrition through a nasogastric tube. The patient was discharged on POD 31 after the suction drains were replaced with open Penrose drains, and enteral nutrition via nasogastric tube was continued at home. The Penrose drains were removed on POD 54, and salivary leakage ceased on POD 111.

Conclusions: Although injuries to the oral cavity and posterior pharynx are more easily recognized, the existence of injury in the pyriform sinus can be challenging to evaluate. However, prompt and appropriate management, including intubation, antibiotic therapy, surgical drainage, and nutritional support, is critical in preventing life-threatening complications.