Prevalence and Pattern of Impacted Mandibular Third Molar: An Institution-based Retrospective Study.

Introduction: The third molar is the most frequently impacted tooth with a frequency of occurrence generally reported to be from 18 to 32%. It is considered impacted when its eruption into normal functional occlusion has been interfered with by other teeth, overlying bone or soft tissue and when it is not fully erupted by its expected age of around 20 years. Racial differences affect the pattern of impaction.

Prepancreatic preduodenal portal vein.

We report a 17 year old girl with prepancreatic and preduodenal portal vein. She presented with recurrent vomiting. Barium study revealed malrotation of the gut.