Ultrasonography of normal and abnormal appendix in children

Figure 1 Ultrasonographic and histologic findings of normal appendix. A: Normal appendix (arrows) with thin inner hypoechoic band was seen on high frequency ultrasonography; B: The thickness of the inner hypoechoic band (cursors) of appendix (arrow) was measured as 0.5 mm; C: Low-magnification view of a cross section of the appendix. The inner wall of the appendix is lined by a layer of surface epithelium. The remainder of the mucosa (crypts, surrounding lamina propria, and the inconspicuous muscularis mucosae) surrounds this surface epithelial layer. The characteristic lymphoid nodules (arrows) within the lamina propria were found (× 20, H-E stain).