Meningioma

A meningioma is a growth that arises from the meninges, the protective membranes that surround the brain and spinal cord. These growths tend to develop slowly over months or years, and in dogs and cats they are often found in older animals. Most meningiomas grow in a way that gradually compresses nearby brain tissue rather than invading it, though the effects depend on where the growth is located and how much space it occupies. Owners often notice changes that reflect pressure on particular parts of the brain: altered behaviour, seizures that begin in middle age or later, subtle loss of coordination, changes in vision, or a head posture that seems unusual. These signs can appear gradually and may initially be attributed to normal ageing. In some cases, a meningioma is discovered during investigation of a single seizure or after imaging is performed for another reason. This page explores the patterns that can signal a meningioma, what is happening beneath those signals, how the condition is investigated, and the range of approaches that exist once a meningioma is identified. The course and options vary considerably depending on the location, size, and behaviour of the growth, as well as the individual animal.