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In the June number of the Laryngoscope I note the following from the pen of Dr. Jonathan Wright: "I have lately seen the frontal bone perforated and the dura mater wounded with disastrous results in a case in which the frontal sinus was lacking on that side."
Dr. Howard A. Lothrop, of Harvard University, after carefully examining 250 frontal sinuses, from dissecting room material, concluded that there was no external landmark defining the superior limit of the sinus; that the external angular process of the frontal bone was not often the limit of the sinus laterally; that in the majority of cases the septum (between the sinuses) deviated to one side or the other within a range of five millimeters or even more, notwithstanding its frequent median position inferiorly; that the plane of the septum was roughly antero-posterior, passing between the anterior and posterior surfaces, but occasionally it might so
PHILIP JH. THE X-RAY IN DETERMINING THE LIMITS OF THE FRONTAL SINUS. JAMA. 1902;XXXVIII(12):764–765. doi:10.1001/jama.1902.62480120022001h
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