A text-book of diseases of the nose and throat (1904)
Kyle, David Braden, 1863-1916 · Philadelphia ; New York ; London : W.B. Saunders · leaf 343
sition, are the main diagnostic points. Trans-illumination is of possible value both in the direct and differentialdiagnosis. The lamp as shown in Fig. 109, or protected by a rubber tube,is placed in the angle between the nose and the eyebrows anddirected upward. The emptying of the cavity by… … Fig. 109.—Electric illuminator for frontal sinus. ditions of the frontal sinus, or the nasal chamber, or ethmoidalcells will vitiate the findings. The prognosis is uncertain. Many cases run a course evenof several weeks, and then cease spontaneously. Others termi-nate in a stubborn and intractable…
