hello, Phleboliths are masses, deposits or growths which develop in the wall of a vein and are composed of calcium or lime. They are common in the pelvic area and are stationary and harmless; however, they can indicate the presence of more dangerous conditions or diseases. Most adults have phleboliths and are unaffected by them because they are symptomless. Their presence is usually only known after an individual has undergone X-ray imaging related to other health issues. Cause - pelvic phleboliths develop in clots within pelvic veins that have been damaged from increased pressure caused by coughing or during the defecation process. The presence of phleboliths can be a warning sign that more severe conditions, such as colorectal hemangiomas (benign tumors), are present in the body of young patients. The masses can also indicate that a patient has an enlarged bladder, rectal distention, stomach cancer or other tumors. hope have been able to answer your query get well soon