What happens if you have a cyst on the brain?
In the brain, cysts sometimes contain cerebrospinal fluid (CSF). Even if a brain cyst is not cancer, it can still cause problems. The cyst may press against brain tissue and cause symptoms, such as headache, vision problems, or nausea. If this happens, you may need surgery to remove the cyst.
Arachnoid cysts are the most common type of brain cyst. They are often congenital, or present at birth (primary arachnoid cysts). The cysts are fluid-filled sacs, not tumors. The likely cause is a split of the arachnoid membrane, one of the three layers of tissue that surround and protect the brain and spinal cord.
- An arachnoid cyst is most likely to develop in your head, but it can also develop around your spinal cord. It's called an arachnoid cyst because it occurs in the space between your brain, or spinal column, and your arachnoid membrane. Arachnoid cysts are usually filled with cerebrospinal fluid (CSF).
- Epidermoid cysts, also called sebaceous, keratin, or epithelial cysts, are small, hard lumps that develop under the skin. These cysts are common. They grow slowly. They do not cause other symptoms and are nearly never cancerous. Epidermoid cysts are often found on the face, head, neck, back, or genitals.
- Outpatient recommendations are as follows:
- Clindamycin 300-450 mg PO q8h for 5-7d or.
- Cephalexin 250-500 mg PO q6h for 5-7d or.
- Dicloxacillin 250-500 mg PO q6h for 5-7d or.
- Doxycycline 100 mg PO q12h for 5-7d or.
- Trimethoprim-sulfamethoxazole (160 mg/800 mg) DS 1-2 tablets PO q12h for 5-7d.
When it's located around the brain, symptoms include:
- Nausea and vomiting.
- Hydrocephalus (accumulation of fluid in the brain, which can change the shape of an infant's head)
- Developmental delay.
- Behavioral changes.
- Hearing and visual disturbances.
- In many cases, arachnoid cysts do not cause symptoms (asymptomatic). In cases in which symptoms occur, headaches, seizures and abnormal accumulation of excessive cerebrospinal fluid in the brain (hydrocephalus) are common. The exact cause of arachnoid cysts is unknown.
- The chances of intracranial epidermoids is about 1% of all brain tumors. This benign tumor of the brain is made up of normal skin cells (stratified epithelial lining) on the outside, and fatty acids and keratin are on the inside of the tumor or sac.
- Arachnoid cysts are cysts, not tumors. They are fluid-filled sacs that develop between the brain/spinal cord and a membrane called the arachnoid membrane, one of three membranes that cover the brain and spinal cord.
Updated: 2nd October 2019