Severe Hypothyroidism Diagnosis and Management

Clinical Manifestations

• A severely elevated TSH level indicates overt hypothyroidism, which presents with symptoms including fatigue, cold intolerance, weight gain, hair loss, constipation, dry skin, bradycardia, and cognitive impairment, according to the American College of Physicians 1, 2
• Profound fatigue and lethargy are common symptoms of severe hypothyroidism 1
• Cold intolerance, or feeling cold when others are comfortable, is a symptom of severe hypothyroidism 1
• Unexplained weight gain despite normal or decreased appetite is a symptom of severe hypothyroidism 1
• Facial puffiness, particularly periorbital edema, is a dermatologic manifestation of severe hypothyroidism 1
• Constipation is a gastrointestinal symptom of severe hypothyroidism 1
• Low free T4 levels are associated with severe TSH elevation 1

Patient Evaluation and Management

• Elderly patients may present with fewer classical symptoms and more cardiovascular or neuropsychiatric manifestations of hypothyroidism, according to the American Geriatrics Society 2
• A TSH level as high as 82.448 mIU/L represents severe hypothyroidism requiring prompt treatment, as recommended by the American College of Physicians 1, 2
• The presence of thyroid autoantibodies should be evaluated to determine if Hashimoto's thyroiditis is the underlying cause, as suggested by the American Thyroid Association 3