Langerhans Cell Histiocytosis with Multiple Fluid–fluid Levels in the Parietal Bone

摘要

Langerhans cell histiocytosis (LCH) is the most common histiocytic neoplasm involving the calvarial bone in children. LCH characteristically shows almost homogeneous signal intensity on gadolinium-enhanced MR imaging. However, LCH manifesting as an osteolytic cystic mass with multiple fluid–fluid levels (FFLs) is rare. This unique imaging appearance has rarely been reported. Herein, we report a case of solitary LCH in the skull with FFLs.