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Thyroxine prophylaxis after bilateral subtotal thyroidectomy for multinodular goiter.
H Kulaçoglu1, C Dener, I Ziraman
1Ankara Numune Teaching and Research Hospital, 4th Surgical Department Samanpazari, Turkey.
Endocrine Journal
|October 19, 2000
Summary
Thyroxine administration after subtotal thyroidectomy for multinodular goiter helps maintain normal thyroid hormone levels. This prevents hypothyroidism and supports pituitary-thyroid axis recovery post-surgery.
Area of Science:
- Endocrinology
- Surgical Oncology
- Thyroid Surgery
Background:
- Multinodular goiter is a common thyroid condition requiring surgical intervention.
- Bilateral subtotal thyroidectomy is a standard surgical approach for multinodular goiter.
- Postoperative thyroid function and recurrence rates are significant concerns following surgery.
Purpose of the Study:
- To evaluate the efficacy of thyroxine (1-thyroxine) administration in preventing recurrence after bilateral subtotal thyroidectomy for benign multinodular goiter.
- To assess the impact of thyroxine therapy on pituitary-thyroid axis function post-thyroidectomy.
Main Methods:
- A cohort of patients with benign multinodular goiter underwent bilateral subtotal thyroidectomy using consistent surgical techniques.
- Postoperatively, patients were randomized into two groups: one receiving 100 microgram 1-thyroxine daily and a control group receiving no therapy.
- Thyroid Stimulating Hormone (TSH) levels were monitored at multiple intervals up to 12 months post-surgery.
Main Results:
- No recurrences were observed in either the thyroxine group or the control group during the follow-up period (6 months to 1 year).
- One patient (5.3%) in the control group developed overt hypothyroidism.
- The thyroxine group maintained significantly lower mean TSH levels compared to the control group throughout the 12-month follow-up.
- The mean TSH level in the control group was elevated, reaching four times the normal limit by the end of the first year, while the thyroxine group's TSH remained within normal, non-suppressed limits.
Conclusions:
- The pituitary-thyroid axis does not spontaneously normalize within one year after thyroidectomy for multinodular goiter.
- Postoperative thyroxine administration is beneficial in maintaining euthyroid status and supporting thyroid function recovery.
- Thyroxine supplementation is particularly valuable in endemic regions with higher incidences of thyroid disorders, such as Turkey.