Noun. 1. dark matter - (cosmology) a hypothetical form of matter that is believed to make up 90 percent of the universe; it is invisible (does not absorb or emit light) and does not collide with atomic particles but exerts gravitational force.
Causes of Similar Symptoms to Acute prostate blockage like symptoms. Research the causes of these symptoms that are similar to, or related to, the symptom Acute prostate blockage like symptoms: Introduction.  conditions which cause acute symptoms similar to that when there is a blockage to prostate secretions. See detailed information below for a list of 1 causes of Acute prostate blockage like symptoms, including diseases and drug side effect causes. Â» Review Causes of  Causes.
Most men with prostate cancer have no symptoms. This is particularly true of early prostate cancer. Symptoms usually appear when the tumor causes some degree of urinary blockage at the bladder neck or the urethra. The usual symptoms include difficulty in starting and stopping the urinary stream, increase in frequency of urination, and pain while urinating.