..., and undermine the innominate fascia and the deep temporal fascia (DTF). Then we raise of the DTF flap (the deep-innominate connecting fascial flap) with careful dissection to preserve vascularity. Creation of the Inlet of the EAC and Preparation for Construction of the EAC We make a flap-like incision...

... Construct the external ear and the tympanoplasty during the second stage of joint surgery by plastic surgeons and otologists. Create Skin Tube Lift up the posterior part of the transplanted auricle framework of rib cartilage and create an external auditory canal (EAC) of 1.5 cm...

... Microtia/atresia of the external auditory canal (EAC) is a rare disease that occurs in 1 in 10,000-15,000 births. There are thought to be approximately 100 such patients per year in Japan. Nearly 90% of the cases are unilateral and 10% are bilateral. In many microtia patients, an EAC anomaly...

... After construction of the external auditory canal (EAC) by inserting a skin tube in the second stage of a staged operation, insert colored silk gauze of 1 cm 2 as a marking sheet on the eardrum at the far end of the EAC, and then insert many cylinders of gauze of 1 cm 2 for compression. 10...

... Reconstruction of the external auditory canal (EAC) and tympanoplasty performed for congenital aural stenosis/atresia are one of the most difficult otological surgeries. This is because the congenital anomaly makes the structures inside the temporal bone less reliable as landmarks for surgery...

... A definite diagnosis of microtia may not require the use of CT in microtia patients who present with obvious stenosis of the external auditory canal (EAC) or complete atresia of the EAC. In such cases, otorrhea may develop in the rudimentary EAC and a subcutaneous abscess can easily form...

...; 8.5 points, 1 ear; 8 points, 2 ears, and 7 points, 1 ear - scores that indicated that all cases were excellent, good or fair in terms of surgical indication. The average postoperative hearing level was 64.3 dB. The EAC was stenotic in 1 case, and occluded in the other cases. In the operation...

... Understanding the etiology of microtia/atresia of the external auditory canal (EAC) is indispensable for explaining the condition to patients and their family members, planning surgery, predicting complications and coping with them in time, and for genetic counseling. The etiology of microtia...

... The temporal bone is a part of the cranial bone that constitutes the ear. Vital organs for hearing such as the external auditory canal (EAC), eardrum, auditory ossicles, cochlea, semicircular duct, otolithic organ, internal auditory canal, facial nerve, and internal carotid are crammed...

.... However, reconstruction of the EAC is not possible if the reconstructed auricle is not suitably positioned. In this case an additional operation using a tissue expander becomes necessary prior to canalplasty. The position of auricular reconstruction should be determined to enable canalplasty not only...

...). Microtia develops more frequently on the right than the left side (approximately 5:3), and the reported incidence of bilateral microtia is approximately 10%. Many cases are complicated by stenosis or occlusion of the EAC in addition to the morphological abnormality of the auricle. Auricular shape...

... Microtia/atresia of the external auditory canal (EAC) may be unilateral or bilateral. Parents of children with this condition are quite shocked when their child is born with a congenital ear anomaly, whether it is unilateral or bilateral. They want to know why their child was born...

...Evaluation of Postoperative Hearing It is enormously difficult to retain good hearing in patients with microtia and atresia of the external auditory canal (EAC) after reconstruction of the external ear/eardrum with ordinary tympanoplasty. The annulus ring should be constructed. The method...

... groove, which will give rise to the primitive auditory canal. c The adult auricle with the derivatives of the six hillocks numbered. Development of the External Auditory Canal The dents of the first brachial groove deeper in the 4th week of gestation to turn into the primitive EAC...

... of such structures differs in each patient with microtia/atresia of the external auditory canal (EAC). This is why canal plasty and surgery for improving auditory acuity are difficult in patients with congenital aural atresia [ 1 ]. Moreover, there is a risk of damaging the surrounding structures. Facial nerve palsy...

... Many cases of microtia are complicated by conductive hearing loss due to congenital atresia of the external auditory canal (EAC) and, sometimes, by a middle ear anomaly. Some patients may have a complication of sensorineural hearing loss without an inner ear anomaly, which is often bilateral...

... In principle, construction of the external auditory canal (EAC)/tympanoplasty is actively performed during elevation of the auricle in all patients with bilateral microtia at our department. This is because improved auditory acuity is expected and headband-type bone-conduction hearing aids can...

... ). Elevation of the left auricle and reconstruction of the EAC/tympanoplasty were performed 12 months after transplantation of costal cartilage and the clinical course is favorable (fig. 5 ). Fig. 3 One month after transplantation of costal cartilage. A skin defect associated with exposure of cartilage...

... later. For the second surgery, reconstruction of the EAC may be performed jointly by plastic surgeons and otologists. When a joint surgery is not performed, the elevation of a reconstructed auricle is performed by plastic surgeons alone. The findings obtained by temporal bone high-resolution computed...