Histoplasmosis Meningitis, also known as histoplasmosis, unspecified, meningitis, is related to adult brain stem glioma and frontal lobe neoplasm. An important gene associated with Histoplasmosis Meningitis is MGMT (O-6-Methylguanine-DNA Methyltransferase), and among its related pathways/superpathways is TCA cycle III (animals).