A Case of Spontaneous Temporomandibular Joint Herniation into the External Auditory Canal / 대한이비인후과학회지

Bony defects of the external auditory canal (EAC) may arise from a tumor, infection, inflammation, trauma, complications from ear surgery, or congenital disease. Congenital bony defects of the EAC are known as a patent Huschke's foramen. Here, we describe a 76-year-old male patient who presented an otalgia in his right ear. Physical examination revealed a dome shaped swelling of the anterior EAC wall, which repeated swelling and retraction as the patient's mouth closed and opened. Computed tomography revealed a bony defect of the anterior EAC wall. We believe that the patent Huschke's foramen allowed spontaneous herniation of the temporomandibular joint into the EAC.

A Case of Cerebellopontine Angle Osteoma Causing Sudden Hearing Loss with Vertigo / 대한평형의학회지

Osteomas arising from the internal auditory canal (IAC) and locating in the cerebellopontine angle (CPA) are rare. These tumors may cause compression of the IAC with varying degree of hearing loss, vertigo, and tinnitus but sometimes asymptomatic. Here we present a 60-year-old female patient presented with a hearing loss of sudden onset in her right ear and recurrent dizziness of whirling type. Magnetic resonance imaging and computed tomography revealed CPA osteoma arising from the porus of the IAC. Osteomas should be considered as differential diagnosis in patients with sudden hearing loss and vertigo.