Which are the causes of Tarlov Cyst?

There is a lot of debate on this topic. The consensus so far seems to be: hereditary, impact/injury, connective tissue disorders, and pressures in ones cerebral spinal fluid and way of body coping with shifts in it.

Personally, I don't have it in my family,and I have no connective tissue disorders. I do tend to fall often even in childhood, but somehow nothing seems to stand out in particular.

Some doctors think people are born with them, or they occur naturally in a rather large number of people without causing noticeable symptoms and they are found on imaging for other issues. Others develop them as a result of an injury or accident, but others develop them because of an underlying connective tissue disease.

Usually a fall or accident

Pressure buildup in spinal column
Falls
Car accident
Trauma

Tarlov cysts are unknown but commonly acure in woman, doctors think they come from trauma to the body

The causes are unknown. Maybe trauma, stress to the spinal fluid, maybe born with them.

I was told that trauma to the spine was a great contributing factor to the cause of these cysts.

Injections in your spine such as epidurals. Significant trauma

unknown

An accident or injury to your spinal cord. It can also be hereditary.

Possible being born with them, or trauma. It is unknown at this time.

No one knows the exact cause of why you cerebrospinal fluid leaks creating the cysts and inflammation on your nerve roots.

The exact cause of Tarlov cysts is unknown. Several theories exist including that the cysts result from an inflammatory process within the nerve root sheath or that trauma injures the nerve root sheath and causes leaking of cerebrospinal fluid (CSF) into the area where a cyst forms. Some researchers believe that an abnormal congenital connection (communication) exists between the subarachnoid space, which contains cerebrospinal fluid, and the area surrounding the affected nerves (perineural region). The connection may remain or eventually close, after allowing cerebrospinal fluid to leak out and cause a cyst. Because Tarlov cysts contain cerebrospinal fluid, researchers have speculated that normal fluctuations in CSF pressure may lead to an increase in cyst size and a greater likelihood of developing symptoms.

I feel mine came from an epidural

Regardless of the underlying proposed causes, the mechanism by which these cysts develop naturally has been attributed to hydrostatic and pulsatile forces exerted by CSF along with a phenomenon of a valve-valve mechanism leading to continuous dilatation of the cyst. “Growth of Lumbosacral Perineural (Tarlov) Cysts: A Natural History Analysis”. In this study, the natural course of the Tarlov cysts was followed and symptoms may worsen as with eg spinal stenosis without detectable changes during imaging. Macroscopic cyst growth is easily detected with MRI, however the growth is not a prerequisite for progression or onset of symptoms. 5 In case of Tarlov cysts, SIZE doesn't matter.

Not only large cysts cause symptoms, also smaller valved TC's or small/large dilations without a vavled maganismen. This is confirmed by different authors, see the articles:

Symptomatic Tarlov cysts are often overlooked: ten reasons why—a narrative review
https://link.springer.com/article/10.1007/s00586-019-05996-1

Electromyography and A Review of the Literature Provide Insights into the Role of Sacral Perineural Cysts in Unexplained Chronic Pelvic, Perineal and Leg Pain Syndromes'
https://www.researchgate.net/publication/318094780_Electromyography_and_A_Review_of_the_Literature_Provide_Insights_into_the_Role_of_Sacral_Perineural_Cysts_in_Unexplained_Chronic_Pelvic_Perineal_and_Leg_Pain_Syndromes

In het geval van een cyste van Tarlov ontstaat de ophoping van vocht tussen een zenuwwortel en zenuwschede aan de onderkant van het ruggenmerg.

Many doctors believe people are born with TC's. However, in the TC community we know that is not always the case. TC's can also be caused from accidents or trauma to the area. This can also cause asymptomatic TC's to become symptomatic. There are studies being done on whether or not genetics may play a part. My sister and I both have Tarlov Cyst Disease.

Still some doubts in science, research is being made.
Most probably it comes about a distinction of the cfr liquid.
Also can be result of accidents, falls…