MR of intracranial Langerhans cell histiocytosis

Area of Science:

• Neurology
• Pediatric Oncology
• Radiology

Background:

• Langerhans cell histiocytosis (LCH) is a rare idiopathic histiocyte proliferation disorder primarily affecting children.
• Intracranial involvement of LCH, particularly within the brain parenchyma, is uncommon.

Observation:

• This report details a pediatric case of LCH with unusual intracranial presentation.
• The LCH involved the dural venous sinuses and the choroid plexus, structures critical for cerebrospinal fluid dynamics and venous drainage.
• Contrast-enhanced Magnetic Resonance Imaging (MRI) was utilized for detailed anatomical assessment.

Findings:

• Contrast MRI effectively delineated the extent of LCH tumor involvement within the intracranial structures.
• The imaging findings indicated a significant risk of venous sinus thrombosis due to tumor encroachment.

Implications:

• This case underscores the importance of considering LCH in the differential diagnosis of pediatric intracranial masses, even with atypical locations.
• Advanced imaging techniques like contrast MRI are crucial for accurate diagnosis, surgical planning, and risk stratification in such cases.
• Early identification of venous sinus involvement is vital for preventing potentially life-threatening complications like thrombosis.