Frolic is a playful word with a happy history. It traces back to the Dutch word vroolijk (merry), which in turn evolved from a Middle Dutch combination of vro (happy) and the adjectival suffix -lijc (-ly).
A normal PSA level is considered to be 4.0 ng/mL (nanograms per milliliter of blood). 1  For men in their 50s or younger, a PSA level should be below 2.5 in most cases.  Older men often have slightly higher PSA levels than younger men.
Prostate-specific antigen (PSA) is a protein produced exclusively by prostate cells. There is a simple blood test to measure your PSA level and this may help to detect early prostate cancer.The chance of having prostate cancer goes up as your PSA level increases (see table below).hirteen per cent of men over 55 have a PSA level of â¥ 4 ng/ml but this does not automatically mean you have cancer. An elevated level can also be due to other conditions, such as benign enlargement of the prostate (BPH), a urinary tract infection or a prostate infection.