Causes of thyrotoxicosis includes all of the following except:
**Core Concept**
Thyrotoxicosis is a clinical syndrome characterized by the presence of excess thyroid hormones in the body, leading to various systemic effects. It can be caused by several conditions, including hyperthyroidism, thyroiditis, and exogenous thyroid hormone ingestion.
**Why the Correct Answer is Right**
Thyrotoxicosis can result from an overproduction of thyroid hormones by the thyroid gland, as seen in Graves' disease and toxic multinodular goiter. It can also occur due to the release of preformed thyroid hormones into the circulation, such as in subacute thyroiditis. Additionally, excessive ingestion of exogenous thyroid hormone can cause thyrotoxicosis.
**Why Each Wrong Option is Incorrect**
**Option A:** (missing)
**Option B:** (missing)
**Option C:** (missing)
**Option D:** (missing)
Please provide the missing options for a complete explanation.
(Note: Once you provide the options, I will complete the explanation with the correct information.)