Considerations on Variation of Size of Frontal Sinuses

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Abstract
The frequency distribution curve of frontal sinuses according to size is found to conform largely to a normal curve. A statistically significant correlation was found between the size of the sinuses as seen in frontal and sagittal radiographs. No correlation was found between the size of the frontal sinuses and the air cell system of the ear, but the series studied was not large enough to warrant any definite conclusions. This also applies to the relationship between the sizes of the frontal sinus and the maxillary sinus. Judging from the observations made in the present material and opinions set forth here, the size of the sinuses as well as any existing asymmetry in a given person seems not to be due to diagnosed or undiagnosed infections. Their growth is probably dictated by the same factors as the mastoid air cell systems, i.e. according to Diamant mainly hereditary factors.

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