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What is a physiological cyst?

I recently had a follow-up ultrasound for an ovarian cyst.  My second one came back and said it likely represents a physiological cyst.  Does this mean it's a simple or complex cyst?  I need to have another ultrasound.  I also have some free fluid in the cul de sac.  What does this mean?  Just a little confused by all this terminology.  Thanks!
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A related discussion, what is a physiologic cyst on the right ovary was started.
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i was diagnosed with this kind of cyst the other day.. is this normal or should i be alarmed about it.. what are the often causes of it..?? im really scared
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4346247 tn?1353156571
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A related discussion, physiological cyst was started.
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It is common, in other words 'normal', to have some fluid in the cul de sac.   If I recall correctly, then up to 10ml is normal.   The cul de sac is the lower area of the abdomen.  In cases of bleeding from a cyst, ruptured or not, there will be more fluid in this area.  (Sometimes this area is refered to as the "pouch of Douglas" in case you see that wording.)  A large amount of fluid can be another possible indication of cancer, but it is not a diagnosis of cancer as other conditions can cause it.
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Thanks for the reply.  I was hoping that was what it meant.  What does it mean when they say there is free fluid in the cul-de-sac?
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Physiological cyst  is another term for function cyst, the normal cysts that come and go as part of the regular menstrual cycle.
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