phyllodes tumor CSP cystosarcoma phyllodes EFO:0000653 phyllodes neoplasm A benign, borderline, or malignant fibroepithelial neoplasm arising from the breast and rarely the prostate gland. It may recur following resection. The recurrence rates are higher for borderline and malignant phyllodes tumors. In borderline and malignant phyllodes tumors metastases to distant anatomic sites can occur. The incidence of metastases is higher in malignant phyllodes tumors. UMLS:C0010701 phyllodes tumor MEDGEN:1209 Note that this class covers both breast and prostate phyllodes tumors NCIT:C2977 MESH:D003557 MONDO:0005078 fibroepithelial neoplasm