Erdheim-Chester with central nervous system involvement: Complex histopathological diagnosis and neurosurgical challenges in a rare histiocytic disorder

This case highlights the strategic utility of the "one-and-a-half " frontotemporal craniotomy in the resection of complex supratentorial lesions. It also underscores the critical importance of molecular diagnostics, particularly the identification of the BRAF V600E mutation, in guiding treatment decisions in ECD.