A Sizable Phyllodes Tumor of the Breast

Phyllodes tumor is a benign breast cancer with a malignant potential. It is very rare in Saudi Arabia and also rare all over the world. Malignant phyllodes tumors originate from the connective tissue of the breast, so they are histologically sarcomas. Accurate preoperative pathological diagnosis is very important for management of phyllodes tumor and allows correct surgical planning and avoidance of reoperation. We report the largest phyllodes tumor ever seen in Saudi Arabia, a 41-year-old female who presented with a huge breast mass occupying the whole breast with areas of ulceration, her history started 14 months before with a slowly growing left breast swelling, ultimately the lump ulcerated and became necrotic. Mastectomy with partial resection of the pectoral muscles was done. The tumor specimen measured exactly to be 30 × 20 × 13 cm in size and weight of 5.4 kg with the closest margin of resection 0.5 cm away from the tumor the histopathology report came as malignant phyllodes tumor.