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Updated: May 12, 2025
If the external orifice becomes occluded, there results a dermoid cyst. Tubulo-dermoids arise from embryonic ducts and passages that are normally obliterated at birth, for example, lingual dermoids develop in relation to the thyreo-glossal duct; rectal and post-rectal dermoids to the post-anal gut; and branchial dermoids in relation to the branchial clefts.
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