Onco surgery (short for oncologic surgery or surgical oncology) is a specialized field of surgery focused on the diagnosis, staging, and surgical treatment of cancer.

Key roles of surgical oncology:

• Tumor Removal – cutting out cancerous tissue, often with some surrounding healthy tissue to ensure complete removal
• Biopsy Procedures – taking tissue samples to confirm diagnosis
• Staging Surgeries – helping determine how far cancer has spread
• Reconstructive Surgeries – restoring form and function after tumor removal (e.g., breast reconstruction after mastectomy)
• Palliative Surgery – relieving symptoms when cancer can’t be cured