When pineal tumors occur in childhood, they can produce an early puberty, especially in boys. This type of tumor causes pressure in the channel that connects two cavities of the brain where fluid flows around the brain and spinal cord. The tumor can cause pressure inside the brain (leading to hydrocephalus), swelling inside the eye and vomiting. It can also cause paralysis of the upward gaze, sagging or drooping of the upper eyelid and a loss of reflex reactions in the eye.
Causes and Risk Factors
Pineal tumors can occur at any age, but they are most common in childhood.