It means that there is an unusual growth in your breast and it should be investigated thoroughly.
A phyllodes tumour is a fibroepithelial neoplasm comprising of breast tissue and can benign, borderline or malignant in nature. An intramammary lymph node that is detected in an ultrasound, is fairly inconclusive and does not reveal to us about the nature of the lymph node. The lymph node may be enlarged due to the infection, inflammation or a neoplastic (cancerous) process.
Hence, it is extremely important that these findings are investigated with further detailed scans and tissue biopsy sampling.
Best regards