How can arachnoid cysts be classified?

What causes arachnoid cysts?

Arachnoid cysts arise mainly because of an abnormality occurring in development, sometimes as a result of a neonatal (newborn) infection. Other cysts are congenital (present at birth).

How are arachnoid cysts diagnosed?

Arachnoid cysts are most commonly diagnosed followed a complaint of headaches, disruption of vision, or delayed development in a child. Even then, the discovery of a cyst is often incidental to another examination.

What is retrocerebellar arachnoid cyst?

retrocerebellar arachnoid cysts are a cyst that is filled with fluid. The cyst in this case is located in the retrocerebellar area which is behind the cerebellum. The cerebellum is the part of the brain that has to do with motor function.

Are brain tumors hereditary?

Hydrocephalus is not a hereditary case. Its root would be several factors such as: Brain malformation upon development in the womb=this called congenital Hydro, infections or diseases acquired in infancy this called acquired Hydro, There are two types: 1.Communicating- wherein the problem is either the slow absorption of the fluid or fast production of fluid. 2. Non-communicating-a Block causes the fluid to fill up. thus causing increase size of head in infants. for adults since the skull is closed by that time, manifestations would be pain, headaches, irritability, due to Increased Intracranial Pressure.

What are the types of Cysts?

the four most common types of cysts are: the Arachnoid Cyst, also called the leptomeningeal cyst the Colloid Cyst the Dermoid Cyst and the Epidermoid cyst, also called the Epidermoid tumor try researching those individualy for further detail. :]

What is an invaginating arachnoid cyst?

AddedPrevious answer is good...Can occur anywhere between surface of the inner brain 'cover' to arising in the spinal cord; like all cysts they are fluid-filled 'bubbles/balloons" that usually --but not always-- put pressure on the brain or spinal cord and cause worsening/permanent nerve damage. There are basically two different types of subarachnoid cysts: either present at birth, and sometimes demonstrate neurological symptoms before the age of 20 years old... Or can be as a result of brain trauma... Not all of these cysts require surgical intervention... just those causing symptoms.With todays minimally invasive "microsurgical" techniques, neurosurgeons are really a lot more successful in removing the "sac" that must be removed to prevent the recurrence of the cyst.Refer to the website: http://www.ninds.nih.gov/disorders/arachnoid_cysts/arachnoid_cysts.htm for a complete review of what you should know about this disease process...GordonAnswerArachnoid Cysts Arachnoid cysts are cerebrospinal fluid-filled sacs that may develop between the surface of the brain and the cranial base or on the arachnoid membrane--one of the 3 membranes that cover the brain and the spinal cord.Most cases begin during infancy, however onset may be delayed until adolescence. Symptoms of an arachnoid cyst are related to the cyst size and location. Small cysts are usually asymptomatic and are discovered only incidentally. Large cysts may cause cranial deformation or macrocephaly (enlargement of the head), producing such symptoms as headaches, seizures, hydrocephalus (excessive accumulation of cerebrospinal fluid), increased intracranial pressure, developmental delay, and behavioral changes. Other symptoms may include hemiparesis (weakness or paralysis on one side of the body) and ataxia (lack of muscle control).Arachnoid cysts most often occur in males.Is there any treatment?Treatment for arachnoid cysts is symptomatic. When symptoms warrant, the surgical placement of a shunt may be required to decompress (remove pressure from) the cyst.What is the prognosis?Untreated, arachnoid cysts may cause permanent severe neurological damage due to the progressive expansion of the cyst(s) or hemorrhage (bleeding). With treatment most individuals with arachnoid cysts do well.

Can arachnoid cyst cause the skull fracture easily. My friends daughter has a fracture right on top of an arachnoid cyst. Can the cyst cause the skull to thin or soften?

Arachnoid cysts can cause chronic remodeling and thinning of the adjacent skull. So--while I've personally never seen a case of skull fx directly overlying an arachnoid cyst (general diagnostic radiologist, 6 yrs in practice)--it certainly would seem that the involved portion of skull would be relatively more susceptible to fracture in the event of trauma.

What is the recovery from arachnoid cysts?

Recovery from either surgical treatment is usually rapid, with symptoms resolving quickly after the excess fluid is redirected, assuming no permanent neurological damage occurred prior to treatment.

What drains cerebrospinal fluid in to venous blood in the dural sinus?

The Cerebrospinal Fluid is absorbed into the venous blood in the dural sinuses through the arachnoid villi. Arachnoid villi connect the subarachnoid space to the superior sagittal sinus.

Which layer of the meninges resembles a spider web?

The middle element of the meninges is the arachnoid membrane

Where does Cerebrospinal fluid enter the bloodstream?

arachnoid granulations

How can arachnoid cysts be classified?

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