**Question:** All of the following are seen in follicular carcinoma of thyroid, except:

A. Hyperthyroidism
B. Thyroid storm
C. Thyromegaly
D. Thyroiditis

**Core Concept:**
Follicular carcinoma of thyroid is a type of thyroid cancer that develops in the follicular cells of the thyroid gland. This cancer typically presents with symptoms related to thyroid hormone overproduction due to the destruction of thyroid follicular cells, causing thyroid hormone excess. The correct answer should not be a symptom or condition associated with thyroid hormone excess.

**Why the Correct Answer is Right:**
The correct answer, **D**. Thyroiditis, is not a symptom or condition directly related to thyroid hormone production. Thyroiditis refers to inflammation of the thyroid gland, which can lead to thyroid dysfunction but is not specifically tied to thyroid hormone excess.

**Why Each Wrong Option is Incorrect:**
A. Hyperthyroidism: This is a condition characterized by excessive thyroid hormone production, often due to follicular carcinoma. It is a correct answer and should be avoided in the correct response.
B. Thyroid storm: Thyroid storm is a life-threatening complication of severe hyperthyroidism, characterized by fever, tachycardia, and multiorgan dysfunction. Though thyroid storm is a consequence of thyroid hormone excess, it is not a direct symptom or condition associated with follicular carcinoma of thyroid.
C. Thyromegaly: Thyromegaly refers to the enlargement of the thyroid gland due to various etiologies, including follicular carcinoma. It is a correct answer and should be avoided in the correct response.

**Clinical Pearl:**
It is essential for medical students and residents to differentiate between cancer-related symptoms and thyroid disorders caused by other etiologies. This helps in arriving at an accurate diagnosis and appropriate treatment plan. In the context of follicular carcinoma of thyroid, avoiding symptoms like hyperthyroidism, thyroid storm, and thyromegaly is crucial to differentiate this cancer from other thyroid disorders.

**Correct Answer:** C. Thyromegaly

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In summary, **D**. Thyroiditis is not a symptom or condition directly related to thyroid hormone excess caused by follicular carcinoma of the thyroid. Hyperthyroidism (option A), thyroid storm (option B), and thyromegaly (option C) are symptoms or conditions that can be associated with thyroid carcinoma but are not specifically linked to follicular carcinoma alone. Thyroiditis is an inflammation of the thyroid gland, but it is not directly tied to thyroid hormone excess.