Abstract
<h3>Frontal Sinusitis. Dr. J. Mackenzie Brown, Los Angeles.</h3> (A short review of the development of the frontal sinus from fetal life to the age of 20 years, when it reaches its full development, is followed by a description of the sinus as seen in children and adults, with emphasis on its frequent asymmetry and anatomic variations as well as on the different anatomic configurations of the nasofrontal duct, which depend on the site of origin of the anlage of the frontal sinus and influence the clinical accessibility and efficiency of the duct. When continuity in the nasofrontal connection is lacking, the thin bony roof of the ethmoid labyrinth is easily penetrated during sounding of the sinus. Various anomalies in the frontal sinus are mentioned. The importance of a knowledge of diploic distribution in the prevention and management of osteomyelitis is stressed, as this disease cannot develop in compact bone. Infection
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