NBME 24 Tongue (NBME Answers)

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Retired NBME 24 Answers

nbme24/Block 2/Question#40 (reveal difficulty score)
A 4-year-old boy has a 1-cm round midline ...
Tongue 🔍 / 📺 / 🌳 / 📖
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+17 upvote downvote
submitted by ∗dbg(197)

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Am I the only one who thought, my whole life, that it actually originates from the thyroid but just physically connected to the tongue

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nbmehelp same +15

medguru2295 me! I went with submandibular gland bc I thought there was a gland under there. +

alexxxx30 nope...i definitely thought the same thing...when I clicked thyroid I was like wow that was an easy question. HA +1

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+7 upvote downvote
submitted by ∗famylife(110)

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"Thyroglossal duct cysts most often present with a palpable asymptomatic midline neck mass usually below [65% of the time] the level of the hyoid bone."

"The thyroglossal tract arises from the foramen cecum at the junction of the anterior two-thirds and posterior one-third of the tongue."

https://en.wikipedia.org/wiki/Thyroglossal_cyst

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dbg Am I the only one who thought, my whole life, that it actually originates from the thyroid but just physically connected to the tongue +15

go watch the osmosis video of thyroglossal duct cyst and you will never get any qs wrong , i learn my lesson , same question for 3 nbmes i got wrong

+15/- usmlecrasherss(27)

^ https://youtu.be/snwEs0u99sY : osmosis thyroglossal duct cyst

+4/- drdoom(1206)

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+4 upvote downvote
submitted by ∗haozhier(23)

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Can someone please explain to me: If the posterior 1/3 of the tongue is developed from 3rd and 4th pharyngeal arches, why is it wrong to choose pharyngeal arch?

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therealslimshady Welcome to NBME +2

mutteringly First time? (meme) +4

drdoom That would be like choosing “blastula” if it were an option: it's not wrong but there's a more precise answer. +

pontiacfever That is wrong. They're indicating towards thyroglossal duct/thyroid which originates from Pharyngeal pouch not arch. secondly, they're asking that the mass originated from which structure. So, as we know it is associated to foramen cecum which is related to tongue. +

drdoom @pontiacfever, i believe you’re responding to @haozhier’s original comment, yes? +

pontiacfever @drdoom, yes the original comment by @haozhier +1

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+0 upvote downvote
submitted by ∗apurva(101)

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Pharyngeal arch is not same as pharyngeal floor, pharyngeal arch is mesoderm from which nerve artery muscle cartilage develop. Pharyngeal floor is from where tongue develops which is endoderm

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mutteringly However... 4th-6th pharyngeal arches do develop ACCCT (arytenoids, cricoid, corniculate, cuneiform, and THYROID). Thyroglossal duct cyst: a remnant of the thyroglossal duct that forms during the embryonic development of the thyroid gland. The thyroid gland originates from the foramen cecum at the base of the tongue and descends caudally into the neck, creating the thyroglossal duct. If the duct fails to obliterate, midline neck cysts or ectopic thyroid tissue can develop anywhere along the path of the thyroglossal duct. +

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