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Ascending colon Short-axis view of the ascending colon (a). A thin wall, stool with an acoustic shadow (black arrowhead), and air with multiple reflections (gray arrowhead) are shown. The external oblique muscle (A), internal oblique muscle (B), and transverse abdominal muscle (C) can be identified in front of the ascending colon in the abdominal wall. Long-axis view of the ascending colon (b). Haustra are shown. The posterior wall is hardly visible
