Malignant Disease of the External Acoustic Meatus and Middle Ear

Improvement of hearing in malformation of the external auditory meatus and middle ear.

Chapter 22 : Epithelial tumours of the external auditory meatus and middle ear

Case reports of cancer of the ear began to appear about 1875. Furstenberg (19240 stated that carcinoma of the ear was first reported around 1775 by Wilde, Schwartze and others, but this statement is wrong: first because histopathology was not available in 1775; and second because Wilde was not born until 1815 and Schwartze not until 1837! This typographical error was later copied by others and ...

CLASSIFICATION OF CONGENITAL MIDDLE AND EXTERNAL EAR MALFORMATIONS: CT STUDY

The authors used high-resolution computed tomography (HRCT) for studying 52 congenitally malformed ears in 45 children between five and 10 years of age. In six children the malformations were bilateral. The malformations clinically manifested as microtia, atresia of the external auditory canal and conductive deafness. Analyzing anatomical details and pathological changes on HRCT axial sec...

Development of the mammalian ear: coordinate regulation of formation of the tympanic ring and the external acoustic meatus.

The tympanic membrane in mammals is a trilaminar structure formed by the apposition of two epithelial cell layers, along with an intervening layer of cells derived from pharyngeal arch mesenchyme. One epithelial layer is contributed by the external acoustic meatus, a derivative of the first pharyngeal cleft. The other epithelial layer is contributed by the tubotympanic recess, a derivative of t...

Malignant eccrine spiradenoma of the external ear.

Eccrine spiradenoma is a benign tumor of sweat gland origin. Malignant eccrine spiradenoma is a rare neoplasm which almost always arises from a pre-existing spiradenoma lesion. In this article, we present a patient with malignant eccrine spiradenoma of the auricula with a prior diagnosis as benign eccrine spiradenoma. Although malignant transformation is usually associated with aggressive behav...