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Alright, I think this one was relatively straightforward.

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This was an example of a thyroglossal duct cyst.

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And the reason this was a thyroglossal duct cyst,

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it's a cystic mass that's located in the anterior portion of the neck.

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The key thing that gives it away is that the cystic mass is actually embedded in

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the strap muscle.

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So if you see a cystic mass in the neck and you see it's embedded in the strap

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muscle, then this is pretty characteristic of a thyroglossal duct cyst.

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So one thing about thyroglossal duct cyst, they can be midline,

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they could be paraline, they could be ocular,

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they can be multilocular.

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But the key thing to make the diagnosis here is that it needs to be embedded in

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the strap muscle.

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And that will give you the diagnosis in this case of a pretty characteristic

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appearance of a thyroid gloss duct cyst.

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So let me stop there. And one thing I did wanna point out,

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there was a little nin right here that runs superior just behind the highway,

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weight bone as well. Do you guys have any questions on this one?

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So if there is a lesion there is embedded in the str muscle, it'll be

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Right in most instances. Yeah. The key, the key thing is that strap muscle.

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And, and the reason

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Be like any other, like epidermoid disease?

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No, those would be outside the strap muscle.

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So you can't epidermoid cyst and lymphatic mal malformations,

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they can involve the anterior neck,

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but they're gonna be outside the strap muscles.

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And the reason why that happens is, um, the reason why clinically,

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these patients with thyroglossal dxi present with a mass involving the anterior

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neck and they move when you swallow. So the strap muscles,

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I always think of the larynx as an elevator and I think of the str uh,

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strap muscles,

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I think the larynx of an elevator in the strap muscles like the elevator

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pullies.

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So basically the way the you swallow is that the larynx gets pulled up

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when you swallow and it kind of gets pulled up. So the food, it it,

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it basically gets pulled up and it closes the opening of the larynx.

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So your food goes down the pharynx and it's the strap muscles that contract that

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end up pulling up the larynx.

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So because the thyroglossal duct cys is embedded in the strap muscles,

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when the strap muscle contracts,

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that's actually pulls up and that's why the thyroglossal duct cysts move

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because, uh,

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epidermoids and other cystic lesions involved in neck are not in the strap

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muscles. That's why they don't move upon swallowing.

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So clinically that's how um,

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our referring physician can differentiate between a thy glo gloss duct

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cyst and other cystic lesions that can involve the anterior neck.