[Rare presentations of cytosarcoma Phylloides]

Area of Science:

• Oncology
• Pathology

Background:

• Cystosarcoma phylloides is a rare biphasic breast tumor.
• Distinguishing benign from malignant forms is critical for patient management.

Observation:

• Presents three cases of cystosarcoma phylloides with varied microscopic features.
• Highlights the challenges in clinical and mammographic differentiation from fibroadenomas.

Findings:

• Recurrence is common, even in tumors initially appearing benign.
• Recurrent tumors often exhibit increased atypia.
• Thorough microscopic examination of multiple tumor areas is essential to avoid diagnostic errors.

Implications:

• Complete excision with clear margins is necessary for benign-appearing tumors in young women.
• Mastectomy may be the treatment of choice, particularly with carcinosarcoma features.
• Axillary lymphadenectomy and adjuvant radiation may be indicated based on tumor characteristics.