Radiological images of keratocystoma: a rare tumor of the parotid gland.

A 34-year-old man found a mildly tender preauricular mass. Ultrasonography revealed an anechoic mass in the superficial lobe of the parotid gland. Magnetic resonance imaging showed thin ring-like contrast enhancement and homogenously high intensity on T2-weighted images.

Dentistry-based approaches to sleep-disordered breathing, algorithms, and multidisciplinary perspectives.

Sleep disorders affect more than 20 percent of the U.S. population, but less than 7 percent have been medically diagnosed.