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Doctor insights on: Posterior Fossa Arachnoid Cyst

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Cyst (Definition)

A cyst is a structure or mass that consists of a cellular lined sac. It is typically filled with fluid but may be filled with solid material. It can be congenital, traumatic, or acquired. They may develop nearly anywhere in the body and usually require complete excision for eradication or they are likely to recur. Fluid filled sacs that are not cellular lined ...Read more


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I have a posterior fossa arachnoid cyst last known 1.7x 1.6x3cm severe headaches, "pressure" in head epilepsy memory loss confusion&others ..related?

I have a posterior fossa arachnoid cyst last known 1.7x 1.6x3cm severe headaches, "pressure" in head epilepsy memory loss confusion&others ..related?

We usually think not: However, there are cases where arachnoid cysts cause symptoms such as headaches and other types of both cognitive, motor, & cognitive problems which get better when the cyst is removed. But that doesn't happen often. Usually, they're benign & have been there since birth. They don't need to be removed unless testing/examination suggests otherwise. If you'd like a 1-1 consult please let me know. ...Read more

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My gf had a NRM.Diagnose: arachnoid cyst posterior fossa and left maxillary sinusitis.What to do next?Treatment?Complications can apper?

Arachnoid cysts: These are congenital abnormalities often discovered incidentally and nothing need be done unless creating symptoms in which case discuss with a neurosurgeon. Sinusitis can be easily managed if it is acute, but radiologic changes can occur due to old inactive disease. She needs to see her doctor and discuss these things. Why was this imaging study done to begin with? ...Read more

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Hi my husband 38 yrs old, has been suffering with headaches, blurred vision and imbalancing, he had a CT scan and MRI which shows having a arachnoid cyst in the posterior fossa region with mass effect something serious?

Hi my husband 38 yrs old, has been suffering with headaches, blurred vision and imbalancing, he had a CT scan and MRI which shows having a arachnoid cyst in the posterior fossa region with mass effect something serious?

See specialist soon: I am hesitant to answer here for your husband for privacy reasons. But I will provide general comments. 1. Above symptoms happen from the arahnoid cyst with dilation of ventricles (inner chambers inside brain). There may be other reasons as well. 2. I would go see a neurosurgeon or neurologist very soon. Or go to ER for getting admitted to the hospital, so these problems can be addressed sooner. ...Read more

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Arachnoid cyst w/mass effect on right aspect of medulla in posterior cranial fossa measuring 15x13mm.What probs might it cause if any? Treat or watch?

Arachnoid cyst w/mass effect on right aspect of medulla in posterior cranial fossa measuring 15x13mm.What probs might it cause if any? Treat or watch?

Arachnoid cysts: Arachnoid cysts rarely cause problems. Posterior fossa arachnoid cysts may have headaches and vertigo ascribed to them but it is likely that other problems such as arthritis in the neck or inner ear pathology are the actual cause. Most arachnoid cysts are observed. Creating windows in the cysts to drain to other cerebrospinal fluid pathways or placing a shunt is performed for symptomatic cysts. ...Read more

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What does left middle cranial fossa arachnoid cyst mean?

Likely congenital: Typically found coincidentally when images obtained for very different purpose. Almost always present from birth, but on rare occasions can expand, but usually without mass effect. May be of value periodically to repeat scans to ascertain absence of issues. ...Read more

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I have cervical hnp and arachnoid cyst(4cm, temporal fossa) can these be connected in anyway? Should i check my whole spinal cord for any cyst? Only 28

I have cervical hnp and arachnoid cyst(4cm, temporal fossa) can these be connected in anyway? Should i check my whole spinal cord for any cyst? Only 28

Probably not: While there is controversy about the origin of an arachnoid cyst, most believe it is congenital. Unless you have marfan's syndrome (connective tissue disorder) or significant scoliosis there is no direct link to a cervical disc herniation. The link would have more to due with meningeal cysts. I hope this helps. Well wishes. ...Read more

Dr. Alan Jacobs
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Arachnoid Cyst (Definition)

An arachnoid cyst is a cyst (round-shaped, fluid-filled) formed during the development of the arachnoid, one of the three thin membranes coverings the brain and spinal cord. In some persons, such a ...Read more