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The transumbilical plane or umbilical plane, one of the transverse planes in human anatomy, is a horizontal line that passes through the abdomen at the level of the navel (or umbilicus). It also intersects the intervertebral disc between the third (L3) and fourth (L4) lumbar vertebrae. This horizontal anatomical plane lies about half an inch above the level of the supracristal plane. In physical examination, clinicians

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