#Left external auditory canal full#
The infant made a full recovery (Figure 5).įigure 1. Based on the above findings, epidermoid cyst was diagnosed. Histopathological examination revealed a keratinizing stratified squamous epithelium with presence of granular cell layer. Macroscopically, the specimen was open cystic tissue piece measuring 4mm x 3mm x 2mm. An intact canal was found after removal of the cyst, which was sent for histopathological examination. Attempt was made to remove the cyst along with its content in to however, there was inadvertent tear of the cyst wall and cheesy content was extruded out.
#Left external auditory canal skin#
The endaural incision was made and flaps raised and a cyst was present below the skin flap completely obstructing the canal (Figure 4). Surgery was performed under general anesthesia on out patient basis, surgery was uneventful, and the patient recovery was good. A provisional diagnosis of canal atresia was made and planned for atresioplasty under general anesthesia. No other external facial or neck cysts, sinuses or lesions were noted and the examination of opposite ear was unremarkable. Behavioral observational audiometry showed normal hearing. HRCT temporal bone revealed EAC atresia with obliteration of cartilaginous part and soft tissue seen projecting into lateral aspect of left middle ear with tympanic membrane was not separately visible (Figure 2 and 3). Left pinna was normal except for the scarring around the tragus (Figure 1). On physical examination, the child was alert and left ear examination revealed a swelling in the left EAC completely obscuring the canal. Family history was not significant and her mother had an uncomplicated delivery. There were no complaints of decreased hearing as the other canal was patent. Case reportĪ 12-month-old Indian toddler was brought to our OPD with left ear canal atresia. Meyer in 1955 classified these cysts as true dermoid cysts, epidermoid cysts and teratoid cysts. The cysts are termed as epidermoid when the lining presents only epithelium, dermoid cysts when skin adnexa are found, and teratoid cysts when other tissue such as muscle, cartilage, and bone are present. It presents as canal obstruction and decreased hearing. Around 7 % are found in the head and neck region.
They are most commonly found in testicles and ovaries. The bone conduction is usually, but not always, normal in CAA.ĭermoid cysts are benign lesions that can occur anywhere in the body. It is commonly associated with other congenital anomalies. It is Bilateral in one third of the patients. Key wordsĬanal atresia, epidermoid cyst, external auditory canal IntroductionĬongenital aural atresia (CAA) has an incidence of 1 in 10,000 live births. Child is on regular follow up with a normal looking EAC. Complete excision of cyst was done and it was reported as epidermal inclusion cyst. During surgery, we found a cyst filling the EAC, which was obscuring the tympanic membrane, which was normal looking. Pre operative diagnosis of EAC atresia was made and atresioplasty was planned. The child had normal hearing and development. We present the case of a 12-month-old male child who was brought to our hospital with complaints of left ear canal atresia.
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