A condition characterized by inflammation of the thyroid gland, resulting in hypothyroidism?

KPSC Staff Nurse - 2016

Medical & Surgical Nursing

Easy

Appeared in: KPSC Staff Nurse - 2016

Explanation

Hashimoto's disease is an autoimmune disorder where the immune system attacks the thyroid gland.
This autoimmune attack leads to chronic inflammation, known as thyroiditis.
The persistent inflammation gradually destroys thyroid tissue, reducing its ability to produce thyroid hormones (T3 and T4).
This progressive thyroid failure results in hypothyroidism, making it the most common cause of hypothyroidism in iodine-sufficient regions.
Diagnosis is confirmed by low T4, high TSH, and the presence of anti-thyroid peroxidase (anti-TPO) antibodies.

Option A: Addison's disease affects the adrenal glands, not the thyroid gland. It is characterized by adrenal insufficiency, leading to decreased production of cortisol and aldosterone.
Option C: Grave's disease is also an autoimmune disorder affecting the thyroid, but it causes hyperthyroidism (overactive thyroid), not hypothyroidism. It involves antibodies that stimulate the TSH receptor, leading to excess hormone production.
Option D: Cushing's disease is a condition caused by an excess of the hormone cortisol. It is typically caused by a pituitary gland tumor that secretes excess ACTH, leading to overstimulation of the adrenal glands. It does not primarily involve the thyroid gland.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of Endocrine Disorders as background academic context rather than a clinical decision trigger.
Nurses play a vital role in educating patients with Hashimoto's about lifelong levothyroxine therapy, including the importance of consistent daily dosing on an empty stomach for proper absorption.
Monitoring for therapeutic effectiveness and side effects is crucial. Nurses must assess for lingering signs of hypothyroidism (indicating under-treatment) or new signs of hyperthyroidism like palpitations and anxiety (indicating over-treatment).
What if the patient is pregnant? Pregnancy increases thyroid hormone demand. A patient with Hashimoto's will likely need a higher dose of levothyroxine during pregnancy, and TSH levels should be monitored more frequently to prevent fetal complications.

How to Approach the Question

First, break down the question stem to identify the key concepts: 1) inflammation of the thyroid gland (thyroiditis), and 2) the result is hypothyroidism (underactive thyroid).
Next, evaluate each option based on these two key concepts.
Recall or deduce the primary characteristic of each disease. Addison's disease affects the adrenal glands. Grave's disease causes hyperthyroidism. Cushing's disease involves excess cortisol.
Recognize that Hashimoto's disease is the classic example of an autoimmune thyroiditis that leads to the destruction of the gland and subsequent hypothyroidism.
By eliminating the other options based on the affected gland or the type of hormonal imbalance (hyper- vs. hypo-), you can confidently select the correct answer.

Concept Tested & Keywords

QDkdhGj71LZ9IoC1aftz06

E6 Pathology- ROBBINS & COTRAN PATHOLOGIC BASIS OF DISEASE 10TH Ed pp. 1077-1079, 1080-1082

E6 Medicine Davidson Principles Practice 24e p. 666-668