Modern crocodylians, including Alligator mississippiensis, have a greatly elaborated system of pneumatic sinuses invading the cranium. These sinuses invade nearly all the bones of the chondrocranium and several bony elements of the splanchnocranium, but patterns of postnatal paratympanic sinus development are poorly understood and documented. Much of crocodylomorph--indeed archosaurian--evoluti...

BACKGROUND AND PURPOSE The falcine sinus has been considered as a rare variation of the venous pathway between the dural layers of the falx cerebri. The purpose of this study was to evaluate the incidence of falcine sinus and its anatomic characteristics by using CTA. MATERIALS AND METHODS A total of 586 consecutive patients were enrolled in this study. A falcine sinus on CTA was defined as a...

objectives: new digital two-dimensional imaging systems are considered as an easily accessible modality for sinonasal evaluation. the aim of this study was to assess the diagnostic efficacy of digital waters’ and caldwell’s radiographic views for evaluation of sinonasal area. materials and methods: a total of 273 patients fulfilling the inclusion criteria were enrolled in this descriptive-analy...

Photo Quiz Chronic, Draining Perianal Sinuses NEELOFER SOHAIL, M.D., and JEANNE P. SPENCER, M.D., Conemaugh Memorial Hospital, Johnstown, Pennsylvania RENEE MATHER, M.D., Mathur Health Care, Johnstown, Pennsylvania A 46-year-old man with a history of alcohol abuse and hemorrhoids presented with a perianal and perineal rash of three to four weeks' duration. It was associated with severe tenderne...