A bronchogenic cyst is an uncommon benign congenital anomaly of the primitive ventral foregut. Although bronchogenic cysts in the midline of anterior neck have been reported, they are known to occur very rarely. Moreover, it has never been reported to be located submentally in adults. Clinically, it is usually asymptomatic and thus incidentally diagnosed. Radiologically, it can not be differentiated from other cystic lesions. Therefore, it is pathologically confirmed only when there are bronchial tissues such as pseudostratified ciliated columnar epithelium, smooth muscle, mucous gland or cartilage. Since this cyst has potential for complication, a complete excision is mandatory. We recently experienced a case of bronchogenic cyst presenting as a submental mass in a 26 year-old man. In this article, we reviewed the etiology, the diagnosis, and the treatment of this case with a review of the literatures.
Adult* ; Bronchogenic Cyst* ; Cartilage ; Diagnosis ; Epithelium ; Humans ; Muscle, Smooth ; Neck

BACKGROUND AND OBJECTIVES: Recently, there have been many reports of antrochoanal polyp (ACP), but the classification of ACP according to the extension of ACP is not yet available. Little is known about what effects the extention of ACP has on the nasal structure. So, in this article, we classified ACP according to the extension of ACP (Type I-extend to nasal cavity, Type II-to nasopharynx, Type III-to oropharynx). SUBJECTS AND METHOD: There were 29 patients who were diagnosed as ACP at the Daejin Medical Center (DMC) recently. There were 4 cases of type I, 20 cases of type II, and 5 cases of type III ACPs. We assessed the clinical, radiological, image-related, and surgical aspects according to the type. The clinical symptom, average symptom duration and surgical aspect were examined using the medical and surgical record. Radiological and image-related feature were analyzed by using CT, navigation software. RESULTS: Nasal obstruction was the most common symptom and the average symptom duration of each type was 18.5 months for type I, 31.1 months for type II, and 32.3 months for type III, repectively. The average fontanelle size of affected maxillary sinus (MS) was larger than that of non-affected side. The volume of affected MS was smaller than that of non-affected side. There was no difference between non-affected and affected MS in the 3-D image at each ACP type. CONCLUSION: We classified ACPs based on the extension of ACP. According to the ACP extension, CT findings were changed but 3-D image and volume of MS were not affected.
Classification* ; Humans ; Imaging, Three-Dimensional ; Maxillary Sinus ; Nasal Cavity ; Nasal Obstruction ; Nasal Polyps ; Nasopharynx ; Polyps*