Although rare in etiology, anterior bony wall defects of the external auditory canal (EAC) accompanied by temporomandibular joint herniation may cause various otologic symptoms. Surgical treatment can be considered based on symptom severity because ...

2024年7月31日 · The external auditory canal (EAC) or external auditory meatus (EAM) extends from the lateral porus acusticus externus medially to the tympanic membrane.

The main function of the EAC is to conduct sound waves in the form of vibrations to the tympanic membrane. The most common congenital lesion affecting the EAC is atresia. Inflammatory lesions include malignant otitis externa and osteomyelitis. Bone tumors are the most common neoplastic lesions encountered. Trauma can cause injury to the EAC.

External ear canal cholesteatomas and keratosis obturans are both rare conditions of the EAC that are often mistaken for each other clinically but require quite different approaches. Similarly, osteomas and exostoses, both bony growths of the EAC, are also not interchangeable, and when they demand intervention, approaches are likewise different.

Osteoradionecrosis is a rare complication of radiation to the temporal bone. Management should be aimed at relief of symptoms, eradication of superinfection, and treatment of other commonly present radiation effects like cholesteatoma and hearing loss.

2023年8月8日 · The main steps of the procedure are: (1) blind sac closure of the external auditory canal (EAC); (2) exenteration of the middle ear and mastoid, including the perisigmoidal, perilabyrinthine, perifacial, and hypotympanic cells; (3) removal of the epithelium and mucosa of the middle ear; (4) closure of the tympanic opening of the Eustachian tube ...

2020年2月12日 · The External auditory canal (EAC) is completely transected and the skin is everted to perform a blind sac closure. The subcutaneous tissue and tragal cartilage is used to reinforce the blind sac with a second layer. The skin of EAC is elevated upto annulus and removed along with tympanic membrane, incus and malleus.

2003年4月1日 · External auditory canal (EAC) cholesteatoma (EACC) is a rare entity with an estimated occurrence of one in 1000 new patients at otolaryngology clinics (1). Patients with EACC typically present with otorrhea and a chronic, dull pain due to the local invasion of squamous tissue into the bony EAC (2).

2024年6月4日 · All patients undergoing STP included four major surgical steps as described by Prasad et al. [5]: (1) BSC of external auditory canal (EAC); (2) canal wall down mastoidectomy (CWDM) with complete removal of ME pathology and all epithelium; (3) exenteration of all mastoid, perisigmoid, perilabyrinthine, perifacial, and hypotympanic cells with pres...

Subtotal petrosectomy (STP), with obliteration of the middle ear and mastoid and closure of the external audito-ry canal (EAC), is an effective solution in mastoid and middle ear diseases that are chronic and recurrent, leave behind a large surgical cavity, exposing vital structures like the dura, carotid, inner ear fluids, or cerebrospinal flui...