Eruptive Xanthoma With Dermal Mucin Deposition

Area of Science:

• Dermatopathology
• Histology
• Lipid Metabolism Disorders

Background:

• Xanthomas are lipid deposits in the skin, presenting in various clinical forms.
• Eruptive xanthoma (EX) is characterized by sudden papule formation, often linked to severe hypertriglyceridemia and metabolic conditions.
• Histologically, EX typically shows foamy cells (lipid-laden macrophages) but not significant mucin deposition.

Observation:

• This report describes a rare case of xanthoma exhibiting diffuse and abundant mucin deposition.
• The clinical presentation aligns with eruptive xanthoma.
• Histopathological examination revealed an unusual quantity of mucin alongside characteristic foamy cells.

Findings:

• The case highlights a xanthoma variant with atypical, extensive mucin accumulation.
• This finding deviates from the established histological profile of eruptive xanthoma.
• The presence of abundant mucin suggests a potential unique pathogenetic mechanism or subtype.

Implications:

• This case expands the histological spectrum of xanthoma, particularly eruptive xanthoma.
• It may prompt re-evaluation of diagnostic criteria and understanding of xanthoma pathogenesis.
• Further research into mucin-associated xanthomas could reveal new insights into lipid metabolism and dermatological conditions.