Finding
The earlier conception that acute otitis was more common in subjects with
Paper
Chronic Mastoiditis and its Roentgen Picture
Citations: 7
Full textAbstract
The textbooks tell us that chronic otitis arises either from an acute otitis or that it appears as a chronic insidious process from the outset. There is no evidence to show how often the disease has developed in the one or the other way. Opinions differ both about the causes of chronic otitis and the problem of cholesteatoma. Up to the end of the last century it was believed that a chronic otitis caused a diminuation of a previously well-developed cell system. At the beginning of the present century, however, it became evident that cell systems of different sizes occur normally and that small cellsystems easily become the seat of chronic otitis. At the same time the general opinion was that acute otitis arose in connection with large cell systems. In 1940, DIAMANT investigated the size of the cell system by making planimetric measurements on roentgen pictures taken partly in normal material and partly in cases of acute and chronic otitis. This has enabled us to determine the average values for the size of the cell . system in the different groups and the variability within them. On an average the largest cell systems are encountered in normal material, the smaller ones in the acute otites and the smallest of all in the chronic otites. Furthermore the cell system in chronic otitis with marginal tympanic perforation is somewhat smaller than in cases with central perforation. DIAMANT has shown statistically that. the earlier conception that chronic otitis readily arises in ears with small cell systems is correct and, moreover, has established the fact that chronic otitis practically never occurs when the size of the cell system exceeds the mean value for normal ears. Further it is also proved by DIAIVIANT that acute otitis occurs more frequently in connection with small cell systems. The earlier conception that acute otitis was more common in subjects with
Authors
M. Diamant, B. Lilja
Journal
Acta Radiologica