In thyroidectomy, 4-5 grams on each side is left is known as:
First, I need to recall the different types of thyroidectomies. There's total thyroidectomy, which removes the entire thyroid gland. Then there's subtotal or near-total, which leaves a small portion. The question is about how much is left. The options aren't provided, but the answer is likely one of the standard terms.
The key here is the weight left. If 4-5 grams are left on each side, that's very minimal. Subtotal thyroidectomy usually leaves about 1-2 grams, but maybe this is referring to a different classification. Wait, I remember that when performing a thyroidectomy, leaving 4-5 grams on each lobe is called a "near-total thyroidectomy." Alternatively, "subtotal" might refer to leaving more. Wait, maybe the terminology varies. Let me check.
In some references, subtotal thyroidectomy leaves 1-2 grams, while near-total might leave 4-5 grams. Or maybe the opposite. I need to be precise. The core concept here is the classification of thyroidectomy based on the amount of tissue removed. The correct term would be "near-total" if leaving 4-5 grams. Alternatively, if the answer is "subtotal," that might be incorrect if the amount left is higher than that term typically refers to.
So, the correct answer is likely "near-total thyroidectomy." The options might have been A: Total, B: Subtotal, C: Near-total, D: Hemithyroidectomy. Since the question states 4-5 grams on each side, which is a small amount, leaving just enough to avoid hypothyroidism. Subtotal usually leaves more, but maybe in some definitions, it's less. Wait, confusion arises here. Let me think again.
Subtotal thyroidectomy is also called a partial thyroidectomy, leaving some thyroid tissue. The exact weight might vary by definition. If the question states 4-5 grams, that's a very small amount, so perhaps the term is "near-total." Alternatively, maybe "total" is incorrect because some tissue is left. So the answer is "near-total." The other options, like hemithyroidectomy, involve removing one lobe, which isn't the case here. Total would leave none. So the correct term is near-total. Therefore, the answer is the option corresponding to near-total.
**Core Concept**
This question tests knowledge of thyroidectomy classification based on the amount of thyroid tissue removed. Leaving 4–5 grams of thyroid tissue per lobe corresponds to a **near-total thyroidectomy**, a procedure that removes most of the gland while preserving minimal tissue to avoid hypothyroidism.
**Why the Correct Answer is Right**
A near-total thyroidectomy removes approximately 95% of the thyroid gland, leaving 4–5 grams of tissue on each lobe to maintain some endogenous hormone production. This approach reduces the risk of hypothyroidism compared to total thyroidectomy but is more extensive than subtotal thyroidectomy (which leaves ~1–2 grams). It is commonly used in conditions like hyperthyroidism to preserve some function while controlling hormone excess.
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