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Revisiting MRI for Appendix Location During Pregnancy

Aytekin Oto1, Padmavathia N. Srinivasan1, Randy D. Ernst1, Mert Koroglu1, Fernando Cesani1, Thomas Nishino1 and Gregory Chaljub1

1 All authors: Department of Radiology, The University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555-0709.


Figure 1
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  		Fig. 1A —Normal appendix in 18-year-old pregnant patient at 12-weeks' gestation. Axial T2-weighted single-shot fast spin-echo image through pelvis shows normal appendix (arrow) within pelvis.

 

Figure 2
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  		Fig. 1B —Normal appendix in 18-year-old pregnant patient at 12-weeks' gestation. Coronal T2-weighted image shows level of base of appendix (dotted line) and level of iliac crest (IC). Note that appendix is below level of iliac crest.

 

Figure 3
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  		Fig. 2A —Normal appendix in 29-year-old pregnant patient at 14-weeks' gestation. Axial fat-suppressed T2-weighted single-shot fast spin-echo image shows appendix posterolateral to cecum (arrow).

 

Figure 4
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  		Fig. 2B —Normal appendix in 29-year-old pregnant patient at 14-weeks' gestation. On coronal fat-suppressed T2-weighted image, level of appendix (dotted line) is same as level of iliac crest.

 

Figure 5
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  		Fig. 3A —Normal appendix in 28-year-old pregnant patient at 26-weeks' gestation. Axial (A) and coronal (B) T2-weighted single-shot fast spin-echo sequence shows normal appendix (arrows) arising from medial aspect of cecum. Appendix is above level of iliac crest (IC).

 

Figure 6
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  		Fig. 3B —Normal appendix in 28-year-old pregnant patient at 26-weeks' gestation. Axial (A) and coronal (B) T2-weighted single-shot fast spin-echo sequence shows normal appendix (arrows) arising from medial aspect of cecum. Appendix is above level of iliac crest (IC).

 

Figure 7
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  		Fig. 4 —Plot of mean superoinferior base of appendix-iliac crest distance (cm) as function of weeks of gestation. Diamonds ({diamondsuit}) represent individual measurements made from MR images. Solid line represents best fit to data using standard least-squares method. The Pearson's correlation coefficient for these data is r = 0.64, thus indicating moderate positive correlation. SI = superoinferior.

 

Figure 8
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  		Fig. 5 —Plot of mean superoinferior cecum-iliac crest distance (cm) as function of weeks of gestation. Diamonds ({diamondsuit}) represent individual measurements made from MR images. Solid line represents best fit to data using standard least-squares method. Pearson's correlation coefficient for these data is r = 0.62, thus indicating moderate positive correlation. SI = superoinferior.

 

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