Breast Ultrasound Normal Breast Cysts. Cysts usually reveal thin walls and through transmission (A). An infamed cyst (B) reveals A thick edematous wall (arrow) with internal layering o thick/thi fuid (arrowhead). A galactocele (C) reveals di use low!level echoes in the cyst. chronic a"scess (#) seen in this e$tended views shows an an irregular %seudo!wall (arrow) with dirty internal echoes due to %us or de"ris (&).