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Case: Perforated Appendicitis

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Okay, so now we have an additional

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ultrasound of the right lower quadrant.

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Notice that our ultrasound technologist has

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labeled this as right lower quadrant plus

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rebound tenderness, which is pretty dramatic.

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When the technologist says there's rebound tenderness,

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let me tell you, there's rebound tenderness.

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They're accustomed to these examinations all day long.

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So that should be an indication that probably this

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is not going to be a normal study, one might say.

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On the first images, you can just

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see that this is an echogenic mass.

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It's so bright, and that is all because

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of so much fluid within those fatty

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layers of the right lower quadrant.

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Hard to know what this is.

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Is this a free collection?

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Is this the cecum?

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Hard to know, but either way, we have a lot of edema.

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And then when you look over here in

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the right side of the image, you'll see

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that there are some shadowing elements

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within this blind-ending tube. You can

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see that shadowing posterior here as well.

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And this is the appendix over in the corner.

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Let's take up the next frame as well.

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Maybe we can see it a little bit better.

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And you will see that this is a patient who

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has a very large appendix with appendicolith

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within it, consistent with appendicitis.

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Now the degree of inflammation is

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pretty dramatic.

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This patient did receive a CT scan as well.

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I think that at this point it probably would've

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been diagnostic of appendicitis, but the

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question was here, is that a drainable fluid

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collection or is this a patient who has a simple

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appendicitis that can be resected. So, frequently

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we'll go on from these just really edematous

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cases, and we'll still get imaging because

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we wanna determine whether or not the

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patient would be more safely treated

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with tube drainage and antibiotics, or if they

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should go on to appendectomy straight away.

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So as we come down, we're going to see again

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that very thickened cecum, just a lot of

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inflammation looking to the contralateral side.

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No inflammation there.

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Lots of fluid, just extensive fluid.

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And then when we look at the appendix

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itself, where we find it coming off

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of the cecum, it barely even attaches.

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There's those appendiceal lips, and as you come up,

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you'll actually see holes in the wall of the appendix.

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So this is frankly perforated appendicitis with a lot

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of free fluid and phlegmon down in the lower quadrant.

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Could I measure a drainable fluid collection?

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Probably not at this point.

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Let's look at the coronals as well.

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You'll see the just blown-out

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appendix there from the wall.

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Maybe even the whole appendix

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is free-floating at this point.

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There is some fluid down here and all around the

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appendix, so it was chosen that this patient would

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go on to antibiotic therapy and then potentially

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re-image in three days to see if any of this

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fluid had organized into a nice drainable fluid

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collection. Here with some gigantic lymph nodes.

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So sometimes we have to make choices of

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whether or not a patient's going to go to

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surgery or not, and we will get a CT image

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in those cases.

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We think the radiation dose outweighs the risks

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at this point because we know this patient has

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a pretty high-acuity perforated appendicitis.

Report

Faculty

Laura L Avery, MD

Assistant Professor of Emergency Radiology Harvard Medical School

Massachusetts General Hosptial

Tags

Infectious

Gastrointestinal (GI)

Emergency

CT

Body

Appendix

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