Where is the thyroid gland remnant typically located if its descent fails during development?

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On the front two-thirds of the tongue's upper surfaceOn the back one-third of the tongue's upper surfaceAt the base of the tongue near the foramen cecumOn the front two-thirds of the tongue's undersideNone of the above

Explanation

If the thyroid gland fails to descend properly, the remnant is usually found at the base of the tongue close to the foramen cecum, which marks the original site of thyroid development.