Microlymphatic aneurysms in patients with lipedema.

Area of Science:

• Vascular biology
• Dermatology
• Obesity medicine

Background:

• Lipedema is a chronic condition characterized by symmetrical fat accumulation, primarily in the lower limbs.
• It is often misdiagnosed as simple obesity, but involves distinct pathophysiological mechanisms.
• Subcutaneous adipose tissue increase leads to leg swelling in lipedema patients.

Purpose of the Study:

• To investigate lymphatic capillary network structure in patients with lipedema using fluorescence microlymphography.
• To identify and quantify microaneurysms in lymphatic capillaries in lipedema-affected areas.
• To compare lymphatic findings between lipedema patients and healthy controls.

Main Methods:

• Fluorescence microlymphography was employed to visualize superficial lymphatic capillaries.
• The study included 12 patients diagnosed with lipedema of the legs and 12 healthy controls.
• Lymphatic capillary networks were examined at the dorsum of the foot, medial ankle, and thigh.

Main Results:

• Microaneurysms, defined as lymphatic capillary segments at least twice the normal diameter, were prevalent in lipedema patients.
• All 8 lipedema patients with thigh involvement exhibited microaneurysms in this region.
• 10 of 11 patients with lower leg fat accumulation showed microaneurysms around the ankle.
• Microaneurysms were less common on the foot and absent in healthy controls at the foot and ankle.

Conclusions:

• Multiple microlymphatic aneurysms are a consistent finding in lipedema patients' affected skin.
• The presence of these microaneurysms appears unique to lipedema, distinguishing it from simple obesity.
• Further research is needed to determine the clinical significance of these lymphatic capillary abnormalities in lipedema.