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Wk 8, Case 3 - Review

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0:05

So, um, on this one, I think, what did you say on this one, Han?

0:08

Do you remember?

0:10

I just mentioned it is a tumor because to me,

0:13

my common brief will, whenever I see a CT scan, thyroid lesion,

0:18

I will characterize further with ultrasound.

0:21

I s make conclusion from the CT scan. Unless it, it's very,

0:25

you define like anaplastic. Other than that,

0:28

I usually don't comment on anything.

0:31

Yeah, I think that's,

0:33

I just from the, from your explanation,

0:35

I just remember there's a white paper sometimes I used to,

0:38

to comment on the size, is it more than one point,

0:41

1.5 or one C according to the age, but not all the time. I will report it.

0:47

You share, I,

0:49

I say other maybe out of 10 times I will report five times in the

0:53

impression for using the white paper.

0:57

I so use most of the time after this.

1:00

Okay. No, I think that's very reasonable, very reasonable approach.

1:04

Now I did give you my template for incidental thyroid nodules. Yeah. So I,

1:08

that that sort of came, yeah,

1:10

I came from the A C R I sort of have to rummage that up.

1:13

I kind of put it in there just to provide more evidence-based approach.

1:16

I don't want to tell, you know, referring physicians what to do.

1:20

But on the other hand, at least I can provide guidelines. Um, and this one,

1:24

you know, like I said, this is a pretty dominant mass.

1:27

So it really is concerning for a, for a, for a tumor. And you're right, I mean,

1:31

you don't necessarily have to put the type of tumor in your differential.

1:34

I just wanted to, to kind of, uh,

1:36

put it in there just to get a sense of if you knew what the differential was,

1:41

but I completely understand your logic and your, and your thinking.

1:48

I just have one question for this kind of tumor, the direct tumor,

1:53

usually they'll ask to look for any retro stern extension.

1:57

And I have difficulty whether is always I will see that

2:02

the,

2:02

the direct tumor to be extend to the behind the man instead of the sternum.

2:07

But I still call it retrosternal extension,

2:12

Right? Yeah, I think so. I think for really to go behi behind the sternum,

2:16

it's gotta go super, super low. So I think this is still too,

2:22

I still think this is a little too, um,

2:24

it's too high to really be called retrosternal extension.

2:27

Okay. Yeah.

2:29

Yeah. Let me see,

2:34

since it's just you and I and we have an hour, let me see if I can, um,

2:39

let me see if I can bring up, have you seen examples of thyroid that extend, uh,

2:43

into the sternum?

2:46

Uh, uh, quite often.

2:48

Usually they'll request a C C C CT neck and Doris to look for

2:52

retrosternal extension,

2:53

but I just don't know how long I will call it retro sternum extension.

2:58

Right, right, right. Um, lemme see if I can bring one up here.

3:03

So how about that?

3:06

Yeah, it's very low.

3:08

It's very low. So for me it has to go through, before I call it retrosternal,

3:12

it has to go below the acromioclavicular joint for me to call it, uh,

3:16

retrosternal extension. Yeah. So I think that, here's a good example here.

3:21

Now we're at the level of superior mediastinum.

3:23

They're the clavicles right here. Uh,

3:26

and there's another example here.

3:28

So this is an example of the acromioclavicular joint and you can see the, uh,

3:32

greater is extending below, and here it's truly retrosternal.

3:37

Does that help answer that question?

3:40

Yes. So it means that if below the acromial otin,

3:44

we'll call it retro.

3:46

Yeah, I believe that's right. Yeah. That's how I normally do it.

3:49

Mm-hmm. And do we need to comment on the airway, the trachea? Yes.

3:53

If it says osi, do we need to give the measurement? If we,

3:58

if we need to give measurement, is it AP or the reef?

4:01

Um, I have

4:02

Difficulty. Yeah.

4:04

Yeah. I don't give measurements on that.

4:06

I just say it's displaced or narrow because typically the patient's may present

4:09

with some strider.

4:11

Yeah.

4:12

So I think what all the clinicians wanna know is whether or not the ator is

4:16

actually compressing the trachea.

4:18

Okay. Just mention it's mild, moderate, severe.

4:21

We don't really need to give measurement.

4:24

Um, yeah, I would, yeah, it depends.

4:26

And so you have to be consistent with what you're, okay.

4:29

You have to be consistent with what you're gonna say. Is mild, moderate,

4:31

or severe?

Report

Patient History
Right thyroid mass.

Findings
Contrast-enhanced CT was performed from the skull base to the thoracic inlet. Study shows no evidence of aggressive lesions involving the nasopharynx, oral cavity, tongue base, tonsils, larynx or hypopharynx. No evidence of enlarged lymph nodes using standard size criteria.

There is a dominant mass involving the right lobe of the thyroid gland which measures approximately 3.5cm in largest dimension. This mass is associated with multiple punctate and peripheral and central calcifications. The mass abuts the lateral wall of the trachea without obvious evidence of tracheal invasion. The right-sided thyroid mass results in medial deviation of the common carotid artery which extends into the right tracheoesophageal groove. There is no evidence of carotid artery encasement.

There is heterogeneity of the left lobe of the thyroid gland with a small low-attenuation mass and measures approximately 5mm.

Visualized portion of the brain is grossly within normal limits.] However, dedicated brain imaging is necessary for complete diagnostic evaluation.

Parenchymal changes involving the bilateral lung apices. However, dedicated chest CT is necessary for complete diagnostic evaluation.

Conclusions
A 3.5cm dominant mass involving the right lobe of the thyroid gland. This may represent a large partially calcified thyroid adenoma. However, a thyroid neoplasm such as either papillary thyroid carcinoma or medullary thyroid carcinoma must also be considered.

Case Discussion

Faculty

David M Yousem, MD, MBA

Professor of Radiology, Vice Chairman and Associate Dean

Johns Hopkins University

Suresh K Mukherji, MD, FACR, MBA

Clinical Professor, University of Illinois & Rutgers University. Faculty, Michigan State University. Director Head & Neck Radiology, ProScan Imaging

Tags

Neuroradiology

Head and Neck

CT