Juvenile xanthogranuloma with central nervous system involvement

Area of Science:

• Dermatology and Neurology
• Histopathology and Clinical Manifestations

Background:

• Juvenile xanthogranuloma (JXG) is a rare histiocytic disorder typically presenting in infancy and childhood with cutaneous lesions.
• While generally considered benign and self-limiting, certain presentations and associations require further investigation.

Observation:

• An 18-year-old male presented with numerous, slowly enlarging yellow-brown papular and nodular lesions characteristic of JXG.
• The patient developed significant memory loss, and neuroimaging revealed cerebral and cerebellar lesions.
• Cutaneous lesions closely resembled those of progressive nodular histiocytoma.

Findings:

• Histopathological examination confirmed JXG.
• The clinical presentation and neurological involvement suggest a potential continuum between JXG and progressive nodular histiocytoma.
• This case represents one of only a few documented instances of JXG with central nervous system involvement.

Implications:

• JXG, particularly nodular forms, may have a broader clinical spectrum including neurological complications.
• The findings challenge the distinct classification of progressive nodular histiocytoma, suggesting it may be a manifestation of JXG.
• Further research is warranted to understand the pathogenesis and long-term prognosis of JXG with systemic involvement.