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UCLA Health - Risks and Complications of Thyroid Surgery | UCLA Endocrine Center

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Author: UCLA Health
Categories: Health
Tags: health
Views: 2 · Last viewed: 2026-10-16 15:01 UTC

Short Summary

Main recommendation: Patients considering thyroid surgery should understand the specific risks, which are low overall, and discuss them with their surgeon, since the UCLA Endocrine Center aims to minimize them. The main risks named are a hoarse voice from nerve irritation, low blood calcium from parathyroid injury, the need for lifelong thyroid hormone, and the general risks of infection and bleeding.

Key Points

  • Hoarse voice occurs in about 5 percent of operations, or 1 in 20, from irritation of the recurrent laryngeal nerve, which lies behind the thyroid; it usually improves on its own.
  • Permanent nerve injury affecting the voice happens in about 0.5 percent of cases (1 in 200), and can sometimes be corrected with other procedures.
  • Removing all four parathyroid glands or cutting off their blood supply occurs in about 1 percent of cases (1 in 100), leading to low blood calcium that requires calcium supplements.
  • Removing half the thyroid means 4 to 6 in 10 people may need thyroid hormone medication afterward; removing the entire thyroid means you will definitely need it.
  • Infection and minor bleeding are general surgical risks, each occurring in less than 1 in 100 people.

Details Worth Noting

  • Concrete instructions: The transcript gives no step-by-step preparation, dosing, or timing instructions. The only actionable advice is to ask questions and get more information by visiting the UCLA Endocrine Center website or calling its office to schedule a consultation.
  • The parathyroid glands are four small glands, about the size of a grain of rice, attached to the four corners of the thyroid.
  • A nerve monitor, a machine in the operating room, can show the location of the nerve when it is not clearly visible and indicate whether it is healthy and working.
  • Surgeons at the center cite their focus on thyroid disease and high volume of thyroid operations as reasons for low complication rates.
  • Thyroid hormone medication generally has no major side effects when the right dose is taken.

Bottom Line

Thyroid surgery is generally safe, but the most common lasting consequences are voice changes, low calcium, and lifelong hormone replacement, so these are worth discussing before surgery.