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Fig. 5A 25-year-old man with right spigelian hernia. Pre-Valsalva
maneuver sonogram over linea semilunaris in axial plane corresponding to
transducer position 1 in Figure
4 (hernia not visible) showing right rectus abdominis muscle (R),
inferior epigastric artery (curved arrow), peritoneal fat stripe
(straight arrows), and lateral abdominal muscles (M).