Barbara, 13 days is fine - breast cancer is very slow growing. It's not that she didn't have any tumor in January - it's that they didn't see it then, for whatever reason. On average, it takes about 8 years for a breast cancer tumor to grow to the size you mention. The doctors know what they're doing - they're not going to put your daughter in danger. So, hard as it is, take a deep breath, and take this time to help your daughter come to terms with her diagnosis. IDC is the most common type of breast cancer; millions of women have been treated for it. And cancer simply isn't the killer it used to be; the great majrorty of us are diagnosed, treated, and continue on with our lives. Best of luck to you both - and stay connected here. I think you'll find a lot of good informaiton and support. - PJH