Late-presenting Posterior Transdiaphragmatic (Bochdalek) Hernia in Adults Prevalence and MDCT Characteristics

Purpose: Pit! objective of our study was to determine the prevalence of posterior transdiaphragmatic hernia in it large normal adult population. We also performed volume measurements and described its characteristics and sequential changes. Materials and;Methods: We prospectively evaluated 31(17 chest computed tot tomography screenings obtained at our center between September 2005 and March 2006. The images were analyzed by experienced radiologists, who focused on the distribution, size, content, and sequential changes of the diaphragmatic hernia. Volumetric measurement was used to evaluate the sire of the hernia. We also performed a chart review for each case and recorded the sex, age, symptoms, and clinical history. Results: A total of 525 hernias were identified in 396 of 3107 persons, representing an incidence of 12.7%. Age ranges were 36 to 86 years and average was 62.8 years. The prevalence of file posterior diaphragmatic hernias in file 50s, 60s, and 70s age groups was 10.5%, (168;1596), 13.7% (137 1003), and 20.3% (801394), respectively. All persons were,symptomatic. In 93.7% (492:525) of the hernias, only fat was observed, whereas kidney involvement was observed in 5.5% (29 525). Protruded hernia content extended along the diaphragm, thoracoabdominal wall, and in the intermediate position between these 2 structures in 53.7%, 32.8%, and 13.5%, of the hernias, respectively. No significant sequential changes wen observed (P- 0.082) during our follow-up period (12 to 27 mol. Conclusions: Incidentally observed posterior transdiaphragmatic hernias are a common finding oil multidetector-row computed tomography, occurring in tip to 20 4 of persons by age 7(1 years.