[The assessment of body composition using DEXA in patients with thyroid dysfunction]

Area of Science:

• Endocrinology
• Metabolic research
• Body composition analysis

Context:

• Thyroid dysfunction, including hyperthyroidism and hypothyroidism, is frequently associated with weight changes.
• The impact of treating these thyroid conditions on body composition remains less understood.
• Understanding these changes is crucial for comprehensive patient management.

Purpose:

• To investigate the effects of hyperthyroidism and hypothyroidism therapy on body composition.
• To compare body composition changes in patients with newly diagnosed hyperthyroidism, newly diagnosed hypothyroidism, well-controlled hypothyroidism, and a history of cured hyperthyroidism.

Summary:

• This study analyzed body composition using Dual energy absorptiometry (DXA) in four groups of patients. Newly diagnosed hyperthyroid patients showed significant increases in both fat mass and lean body mass after treatment, with no change in body fat percentage. Patients with hypothyroidism, whether newly diagnosed or long-term controlled, and those with a history of cured hyperthyroidism did not exhibit significant changes in body composition or weight following treatment.
• Hyperthyroid patients gained an average of 3.9 kg, with a rise in Body Mass Index (BMI).

Impact:

• Treatment for newly diagnosed hyperthyroidism leads to parallel increases in fat and lean mass, suggesting a complex metabolic response.
• Correction of hypothyroidism does not appear to influence body composition or lead to weight loss.
• These findings highlight the distinct effects of hyperthyroid treatment on body composition compared to hypothyroidism treatment.