To fill this knowledge gap, Dr. Lukens and colleagues looked at the diagnostic yield and complication rates in 62 patients with surgically altered bowel anatomy who underwent DBE at Mayo Clinic in Florida between 2006 and 2011: 1  Eleven of the procedures were DBE-ERCPs.
The lateral masses are paired blocks of bone located lateral to the sacral foramina. The sacral ala is the wing-shaped bone found lateral to the S1 vertebral body. Histologic study of the sacral alae demonstrates decreased trabecular density (âalar voidsâ) within each of these structures (3).
Classification. One of the most common classification systems of sacral fractures is to use the direction of the fracture line within the sacrum. Vertical fractures can occur in the alae or through the foramina. Oblique fractures can occur anywhere.he sacrum is a triangular shaped bone consisting of 5 fused sacral veterbrae that articulates with the 5 th lumbar vertebra superiorly and the coccyx inferiorly. It is part of the pelvic ring and participates in weight transfer from the trunk to the lower extremities.