I Just Had A Mama Gram Withultrasound And Found Thatihave

I just had a mama gram withultrasound and found thatihave a mass with tentacles....but had a cyst remove end about 6yrs ago and I he dr said that is is not the same mass....I have to go back in 6months to see if mass has has changes or grown
Should I be. Worried....they said that'll my nextappt,they meyneed to do byopsi
Said that basic cyst is round...but this is not the same as cyst removed before