Print OverviewChoroid plexus carcinoma is a rare type of brain cancer that happens mainly in children. Choroid plexus carcinoma begins as a growth of cells in the part of the brain called the choroid plexus. Cells in the choroid plexus produce the fluid that surrounds and protects the brain and spinal cord. This fluid is called cerebrospinal fluid, also known as CSF. As the cancer grows, it can cause too much CSF in the brain. This can lead to symptoms such as irritability, nausea or vomiting, and headaches. Treatment and chance of recovery depend on many factors. These include the cancer's size, location, whether it has spread, and your child's age and general health.Products & ServicesA Book: Mayo Clinic Family Health BookNewsletter: Mayo Clinic Health Letter — Digital EditionShow more products from Mayo Clinic SymptomsChoroid plexus carcinoma symptoms include: Blurred or double vision. Headaches. Increased tiredness. Irritability. Nausea. Seizures. Vomiting. When to see a doctorMake an appointment with a doctor or other healthcare professional if your child has any symptoms that worry you. Request an appointment CausesIt's not clear what causes most choroid plexus carcinomas. This cancer starts as a growth of cells in the brain. Choroid plexus carcinoma happens when cells in the brain develop changes in their DNA. A cell's DNA holds the instructions that tell the cell what to do. In healthy cells, the DNA gives instructions to grow and multiply at a set rate. The instructions tell the cells to die at a set time. In cancer cells, the DNA changes give different instructions. The changes tell the cancer cells to grow and multiply quickly. Cancer cells can keep living when healthy cells would die. This causes too many cells. The cancer cells form a mass called a tumor. The tumor can grow to invade and destroy healthy body tissue. Risk factorsFactors that increase the risk of choroid plexus carcinoma include: Young age. Choroid plexus carcinoma can happen at any age. This brain cancer happens most often in children under 2 years old. Inherited syndromes. Some choroid plexus carcinomas are linked to certain genetic changes that can run in families, such as with Li-Fraumeni syndrome. By Mayo Clinic Staff Request an appointment Diagnosis & treatment Feb. 04, 2025 Print Living with choroid plexus carcinoma? Connect with others like you for support and answers to your questions in the Adolescent & Young Adult (AYA) Cancer support group on Mayo Clinic Connect, a patient community. Adolescent & Young Adult (AYA) Cancer Discussions How do you, as a parent, deal with the anger? Son has sarcoma 16 Replies Sun, Feb 02, 2025 chevron-right Can a Hodgkins lymphoma survivor get married? 6 Replies Thu, Nov 28, 2024 chevron-right Hodgkin lymphoma: How can I help my friend? 11 Replies Sun, Aug 04, 2024 chevron-right See more discussions Show references Choroid plexus. American Brain Tumor Association. https://www.abta.org/tumor_types/choroid-plexus/. Accessed Jan. 4, 2023. Townsend CM Jr, et al. Neurosurgery. In: Sabiston Textbook of Surgery: The Biological Basis of Modern Surgical Practice. 21st ed. Elsevier; 2022. https://www.clinicalkey.com. Accessed Jan. 4, 2023. Winn HR, ed. Choroid plexus tumors. In: Youmans and Winn Neurological Surgery. 8th ed. Elsevier; 2023. https://www.clinicalkey.com. Accessed Jan. 4, 2023. Choroid plexus tumors diagnosis and treatment. National Cancer Institute. https://www.cancer.gov/rare-brain-spine-tumor/tumors/choroid-plexus-tumors. Accessed Jan. 4, 2023. Brain tumor: Diagnosis. Cancer.Net. https://www.cancer.net/cancer-types/brain-tumor/diagnosis. Accessed Jan. 17, 2023. Creagan ET (expert opinion). Mayo Clinic. Jan. 12, 2023. 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