The document discusses the thyroid gland and thyroidectomy surgery. It describes the thyroid gland's anatomy and location in the neck. It then explains the different types of thyroidectomy surgeries performed including hemi-thyroidectomy, subtotal thyroidectomy, near total thyroidectomy, and total thyroidectomy. The pre-operative preparation, procedure, post-operative management, and potential complications of thyroidectomy are also summarized.