hello DOCTOR , I AM PREGNANT 34+ WEEKS , MY LAST ULTRASOUND DONE 3 DAYS BEFORE SHOWED A CYST ATTACHED TO THE LOWER POLE OF THE RIGHT KIDNEY OF MY FOETUS, ALL HER PARAMETERS AND BODY SYSTEMS ARE NORMAL , THE SIZE OF THE CYST IS 1.8CM* 2.2CM ............ WHAT WOULD BE THE DIAGNOSIS AND IS IT DANGEROUS OR NOT ?