Breast clinic letter

Hello,

I had a breast core biopsy last week with an ultrasound and mammogram. During my ultrasound the doctor told me there was nothing suspicious in my lymph nodes of breast tissue. My letter confirmed no spread to lymph nodes under my arm but my letter still states N2. Does anyone know if there is a reason for this or maybe the doctor read the scan wrong.

Thank you for any help.

Denise x