Home Diseases Guide 2.3 cm hypoechoic, what does it mean?

2.3 cm hypoechoic, what does it mean?

I am in late 40’s with no history of breast cancer. I found the lump a few weeks ago. My mammogram and ultrasound report states I have a 2.3 cm hypo-echoic, with no cystic or solid mass. I don’t have the full report. I’m worried and just need someone to explain to me what that means? I just came back from a core biopsy. Thanks.