Erratum to: Emerg Radiol (2015) 22:643–649

DOI: 10.1007/s10140-015-1338-1

The original version of this article contained errors.

The legends of Figs. 3 and 4 are correct; however, their corresponding images are not. The image shown in Fig. 3 should be for Fig. 4; and the image in Fig. 4 should be for Fig. 3.

Also, some words were missing in the last line of Fig. 3 legend. The last sentence should read “Note the prominent appendiceal tip (arrows) in this patient with early appendiceal tip involvement secondary to lymphoid hyperplasia. This patient also recovered.”

Fig. 3
figure 1

Prominent tip: reversal offindings. a CT: axial image. This patienthad acute right lower quadrant pain. The appendix (arrow) was identified and the tip appeared a little fuzzy. In addition, there was some early peri-appendiceal fat stranding. b CT: sagittal reconstruction. Note the swollen appendix which is hyperintense with a prominent, more swollen, and bulbous tip (upper arrow). These findings would be consistent with early viral appendicitis possibly going on to purulent appendicitis. This patient was assessed by surgery and thought not to have a surgical abdomen. He was observed for 23 h, and by the end of that time was eating and ready to go home. c Ultrasound findings. Note the prominent appendiceal tip (arrows) in this patient with early appendiceal tip involvement secondary to lymphoid hyperplasia. This patient also recovered

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Fig. 4
figure 2

Pink appendix with bulbous tip. a Note a typical pink appendix but also note that the tip (arrowheads) is swollen, more bulbous, and larger. b Axial CT study in this patient demonstrates the appendiceal tip (arrow) to be a little indistinct and fuzzy consistent with early inflammation. c Low power cross-section histologic image of the proximal appendix. Note the clean, well-formed purple germinal centers surrounding the lumen. d Low-power longitudinal section of the tip. Again, note numerous purple germinal centers but that some of them appear to be undergoing ischemic/hemorrhagic disorganization. e High-power view of the germinal centers demonstrates early hemorrhage (arrow). f Another high-power view of the germinal centers shows early infiltration by neutrophils (arrows)

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