Final answer:
Antibodies against thyroid-stimulating hormone receptor are present in most patients with Hashimoto thyroiditis, an autoimmune disorder that causes hypothyroidism.
Step-by-step explanation:
In most patients with Hashimoto thyroiditis, antibodies against thyroid-stimulating hormone receptor are present. Hashimoto thyroiditis is an autoimmune disorder that occurs when the immune system mistakenly attacks the thyroid gland. This results in insufficient secretion of thyroid hormones, leading to hypothyroidism.