Cancer detected in lymph node behind pectoral muscle

[Dakini52]

Has anyone had this occur? I was 3 years out from completion of treatment for HER2 breast cancer and a recent MRI detected an abnormality in the lymph node behind my pectoral muscle. Ultrasound-guided biopsy determined it was malignant. I am going through all the testing now to see if the cancer has spread anywhere else. Just wondered if anyone else had a recurrence in this area?