Pet rabbits medicine takes an increasing place in small animal practice. Despite significant progress in lagomorph medicine, surgery, and imaging, there are still numerous unexplored areas. The study of external otitis in the rabbit is almost exclusively limited to parasitic otitis [2]. However, pet rabbits like dogs and cats can be seen for non parasitic external otitis (allergic, fungal, or b...

In the first of a two-part series, we review issues pertinent to the anatomy, embryology, and criteria for comprehensive management of children with microtia. The salient aspects of external ear anatomy, including the nerve and blood supply, lymphatic drainage, and aesthetic anatomic relationships, are described. An overview of the embryologic development of the external and middle ear and its ...

CASE SUMMARY A 7-year-old spayed domestic longhair cat from Perth, Western Australia, presented with left-sided head tilt, dysphonia, head shaking, inappetence and weight loss. A polypoid lesion had previously been removed from the external ear canal. Otitis media with extension into the external ear canal was suspected and investigated using video-otoscopy and computed tomography examination. ...

The aim of this article is to present clinical features, diagnostic procedures and surgical treatment of a rare ear tumor. We report a case of 78 year old female with hidradenoma of the external auditory canal. Patient had a sensation of pain and fullness with permanent ottorhea from the right ear for one year Temporal bone computed tomography showed a tumor of the external ear, 6 centimeters i...

Directional properties of the sound transformation at the ear of four intact echolocating bats, Eptesicus fuscus, were investigated via measurements of the head-related transfer function (HRTF). Contributions of external ear structures to directional features of the transfer functions were examined by remeasuring the HRTF in the absence of the pinna and tragus. The investigation mainly focused ...

Osteoma of the temporal bone most commonly occurs in the external ear. Osteomas in the middle ear are not common, and only 25 relevant cases (18 papers) have been reported in the English literature. With only 5 cases reported to date, osteoma of the promontory in the middle ear is rare. This study reports a case of asymptomatic osteoma of the promontory in the middle ear mimicking a congenital ...

BACKGROUND Mechanical stimuli imparted by skeletal muscles play an important role during embryonic development in vertebrates. Little is known whether skeletal muscles are required for normal external ear development. METHODS We used Myf5-/-:MyoD-/- (double-mutant) mouse embryos that completely lack skeletal musculature and analyzed the development of the external ear. We concentrated on the ...

The ear lobe crease (ELC) has been defined as a deep wrinkle that extends backwards from the tragus to the auricle. It has been proposed that ELC is a predictor of coronary artery disease (CAD). In this review, we consider the possible association between ELC and CAD. Our aim is to systematically address all the relevant evidence in this field. There are many studies that support an association...

Chondroid syringoma of the external ear canal is a rare, usually firm or polypoid tumor, representing the cutaneous counterpart of pleomorphic adenoma of salivary glands. We report a very rare case of chondroid syringoma in a 40-year-old man who presented with a fluid-containing cyst in the external ear canal. Clinical and radiological examinations showed involvement of the whole external canal...

Spectral localization cues provided by the outer ear are utilized in the construction of the auditory space map in the superior colliculus (SC). The role of the outer ear in the development of this map was examined by recording from the SC of anesthetized, adult ferrets in which the pinna and concha had been removed in infancy. The acoustical consequences of this procedure were assessed by reco...