PubMed · 5529138
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K Yamashita. 1970. [Mycoses].. https://pubmed.ncbi.nlm.nih.gov/5529138/
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A variety of medical specialists are exposed to patients who seek treatment of external ear neoplasms. They are uncommon occurrences, and malignancies of the external ear are even rarer. Only 1 patient in 10,000 with an ear complaint will have a pathologically proven malignancy of the external ear. Tumors of the external ear, both malignant and benign, commonly resemble one another. A timely and correct diagnosis is necessary to avoid affecting the external ear's ability to collect sound, but also to avoid the more morbid and mortal complications of an external ear malignancy. This paper briefly outlines the epidemiology of external ear tumors, their etiology, related histopathology, and treatment, which encompasses a myriad of modalities and specialties.
Ear patients were treated in Berne for the first time in 1841 at the Eye Policlinic. Professor Wilhelm Rau (1804-1861), ophthalmologist, was the founder of the first Ear Infirmary on the European continent. A diary dated from 1845 to 1863 contains information about the patients, their diagnoses and therapies. Chronic inflammations of the Eustachian tube and the middle ear were the most frequent diseases. Catheterisation of the Eustachian tube was an important tool in diagnosis and therapy.
For imaging the facial canal in its tympanic and mastoid segments, a new technique was developed with high-resolution computed tomography (HRCT). This method is based on comparative anatomical studies and makes it possible to depict the course of the facial canal, especially in malformations of the middle ear and in cases of fractures, tumors and cholesteatomas. A longitudinal scan of the petrous part of the temporal bone is obtained by reconstruction based on primary axial CT-standards. In these longitudinal scans the facial canal is shown both in its tympanic and mastoidal segment. For longitudinal reconstruction the scan is orientated through the anterior margin of the carotid canal and petrous pyramid. For evaluating the facial canal in this study, the lateral semicircular canal and stylomastoid foramen are sure landmarks. The sensitivity for evaluating the tympanic segment of the facial canal is 100%. This new technique should be applied in cases in which the exact course of the facial canal must be known preoperatively.