Which of the following surgeries involves the removal of a portion of the thyroid parenchyma?

The removal of a portion of the thyroid parenchyma is specifically referred to as a partial thyroidectomy. This procedure involves the surgical excision of a part of the thyroid gland, which may be performed for various reasons, including the presence of nodules, goiters, or early-stage thyroid cancers. By removing only a portion of the thyroid, the remaining thyroid tissue can often still produce sufficient hormones for normal metabolic function, which is a key aspect of the procedure.

In contrast, a complete thyroidectomy involves the total removal of the thyroid gland, which would not qualify as removing just a portion. Thyroid ablation typically refers to the process of destroying thyroid tissue using methods such as radioiodine therapy or other techniques, rather than surgical excision. Therefore, the answer accurately identifies the type of surgery that specifically focuses on partial removal of the thyroid gland.