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The transverse lumbosacral back flap.

The transverse lumbosacral back flap is presented as a good one to use for coverage of sacral defects. Its reliability appears to be due to an axial pattern of its proximal portion, and to an uninterrupted subdermal vascular plexus across the midline of the back (supplying the terminal portion). A retrospective analysis of its use in 20 patients, over the last 3 years, suggests that when it is designed properly it can be most useful in the management of sacral pressure sores.