A ringing in the ears or hearing impairment. The areas that control hearing are located in the temporal lobe of the cerebral cortex and adjoin those that command linguistic comprehension and language skills. These areas are sited near the temples. Hearing impairment, especially if it is pronounced in one ear, or similarly, a ringing pronounced in one ear, is certainly a possible symptom of a tumor that is placing pressure on the hearing and language centers. If you experience such symptoms, they certainly warrant a visit to a specialist you trust.
Sexual Impotence. The pituitary gland is a tiny gland about the size of a pea and sited just under the brain. This gland is a master-gland that controls the release of hormones from other glands, such as the secretion of hormones responsible for conception and childbirth. When a tumor affects the pituitary gland, this can result in an over or under production of hormones, both of which can completely disrupt the processes of conception, birth, and even lactation.
Balance issues and inability to maintain equilibrium. A certain part of the brainstem helps in maintaining the motor functions involved in walking. A tumor present in the cerebellum can cause a persistent loss of equilibrium when walking in the dark. This is because the cerebellum is concerned with both bodily coordination and with balance.