Hypertrophied muscular bands in the region of the foramen of Bochdalek as a cause for an accessory fissure within the liver.
Within the right lobe of the liver a linear echogenic band with two parallel sonolucencies within it (accessory fissure) was noted on both real time and static scans of 11 patients over a one-year period. Examination of 27 cadavers was performed to ascertain the etiology of this band and demonstrated three with diaphragmatic bands. In two cadavers the band occurred in a location compatible with the echogenic line noted on ultrasound. The embryonic origin of the diaphragmatic band is presumed to be the anterior edge of the foramen of Bochdalek.
D000328:Adult; D000368:Aged; D002102:Cadaver; D003964:Diaphragm / Q000473:pathology; D005260:Female; D006801:Humans; D006984:Hypertrophy; D008099:Liver / Q000033:anatomy & histology*; D008297:Male; D008875:Middle Aged; D014463:Ultrasonography