Body Composition in Primary Hyperparathyroidism: A Potential Contributor to Weakness and Fatigue

Area of Science:

• Endocrinology
• Metabolic Diseases
• Body Composition Analysis

Background:

• Primary hyperparathyroidism (PHPT) frequently causes weakness and fatigue.
• The underlying mechanisms for these symptoms in PHPT remain unclear.
• Investigating body composition may reveal insights into PHPT-related symptoms.

Purpose of the Study:

• To assess the association between computed tomography (CT)-derived muscle and adipose tissue metrics and weakness/fatigue in PHPT patients.
• To determine if body composition metrics correlate with symptom severity in PHPT.

Main Methods:

• Retrospective analysis of CT scans from 53 PHPT patients.
• Calculation of skeletal muscle index (SMI) and visceral adipose tissue (VAT)/subcutaneous adipose tissue (SAT) ratio from L3 vertebral level CT images.
• Sarcopenia defined using established sex-specific SMI thresholds; demographic and clinical data collected.

Main Results:

• 45% of patients reported weakness, 81% fatigue, and 58% had sarcopenia.
• Lower SMI was significantly associated with preoperative weakness in females, but not males.
• Symptomatic females had higher VAT/SAT ratios, while symptomatic males had lower ratios, though not statistically significant.

Conclusions:

• Preoperative weakness in females with PHPT is significantly linked to lower SMI.
• The impact of parathyroid hormone on skeletal muscle and visceral fat may exhibit sex-specific differences.
• No significant body composition changes were observed post-parathyroidectomy.