Goitre (thyroid enlargement)

What it looks like and how it behaves

Goitres range from diffuse, evenly enlarged glands to single or multiple nodules. Some remain small and painless, while larger enlargements can cause a tight feeling, cough, difficulty swallowing or breathing. The swelling itself is a swelling of thyroid tissue; the gland’s function may be normal, underactive, or overactive depending on the underlying disorder.

Causes and classification

• Endemic iodine deficiency — common historically in inland and mountainous regions.
• Autoimmune thyroid disease — for example, Hashimoto’s or Graves’ disease.
• Nodular thyroid disease — solitary or multinodular goitre; some nodules may become autonomous.
• Other causes — medication effects, inflammation, congenital conditions or tumours.

Diagnosis and investigations

Evaluation typically includes physical examination, blood tests of thyroid function (TSH and thyroid hormones), and imaging such as ultrasound. Additional tests, including thyroid antibody assays, radioactive iodine uptake studies or fine-needle aspiration biopsy, are used when the cause is unclear or when a nodule raises concern for malignancy.

Treatment and public health

Management depends on cause and severity: mild, nonobstructive goitres may be monitored; iodine supplementation and public measures like iodized salt have reduced endemic goitre. Medical therapies include levothyroxine or antithyroid drugs, radioactive iodine for certain toxic goitres, and surgery (thyroidectomy) for compressive symptoms, cosmetic reasons or suspected cancer.

Historically significant and still relevant in some regions, goitre is both a clinical sign and a public-health indicator. Prompt assessment distinguishes benign, treatable enlargement from conditions requiring more urgent intervention.