MedGen

A contagious viral infection caused by the mumps virus. Symptoms include swollen and tender parotid glands, fever, muscle aches and fatigue. Due to vaccination programs, mumps has become a rare disease. [from NCI]

Chronic form of meningitis (disease). [from MONDO]

Hydrocephalus is an active distension of the ventricular system of the brain resulting from inadequate passage of CSF from its point of production within the cerebral ventricles to its point of absorption into the systemic circulation. [from HPO]

Inflammation of the meninges and brain, generally secondary to an infectious cause. Pathogens may be bacterial, viral, fungal, or protozoan. [from NCI]