D37-D48: Neoplasms of uncertain or unknown behaviour

D42: Neoplasm of uncertain or unknown behaviour of meninges

Neoplasm of uncertain or unknown behaviour of the meninges refers to a group of conditions where a growth or tumor occurs in the meninges, the three-layered protective covering of the brain and spinal cord. The term "uncertain or unknown behaviour" indicates that it's not clear whether the neoplasm is benign (non-cancerous) or malignant (cancerous). The cause of these neoplasms is typically unknown, but some can be related to genetic disorders or exposure to certain chemicals or radiation. Common symptoms may include persistent headaches, changes in vision, seizures, and in some cases, changes in personality or mental function, depending on the location and size of the neoplasm. These neoplasms can progressively hinder the normal functioning of the brain or spinal cord, leading to a diverse range of neurological problems.