Surgical Mass Removal (Lumpectomy)
The surgical excision of a cutaneous, subcutaneous, or internal tissue mass with appropriate surgical margins to diagnose and treat tumors or cysts.
💬 In Plain English
A mass removal (commonly called a lumpectomy) is a surgical procedure to remove a lump from the skin, underlying muscle, or internal organs. Before surgery, a veterinarian will usually test the lump with a fine needle (FNA) to get a clue about what it is. If the lump is suspected of being cancerous (like a mast cell tumor or soft-tissue sarcoma), the surgeon will cut wide around it (often taking 2 to 3 centimeters of healthy tissue and a deep layer of tissue beneath it) to ensure no microscopic cancer "roots" are left behind. The removed mass is then sent to a pathologist for a biopsy.
🔬 Clinical & Technical Depth
For Vets & TechniciansFormal Clinical Definition
Surgical resection of abnormal tissue proliferations categorized into marginal excision (shelling out benign lipomas/cysts), wide local excision (2–3 cm lateral margins with 1 deep fascial plane for malignant tumors), and radical excision (e.g., limb amputation).
Why Veterinarians Use It
Veterinarians perform mass removals to eliminate uncomfortable lumps, cure localized cancers before they spread, and obtain definitive histopathology.
Clinical Context Encountered
A very common surgical procedure in middle-aged and senior dogs and cats who develop skin bumps or soft-tissue growths.
Clinical Reference Guide (Surgical Procedure)
- •Incomplete margins (when cancer cells reach the edge of the surgical cut) mean tumor cells were left behind in the pet, often requiring a second revision surgery or radiation therapy.
❓ Questions to Ask Your Veterinarian
Take these actionable questions with you to your next clinic visit or appointment:
- 1Was a pre-operative fine needle aspirate (FNA) performed to determine the surgical margin strategy?
- 2How wide were the surgical margins taken around the lump?
- 3Was a surgical drain placed to prevent fluid accumulation (seroma)?
- 4Will the entire excised mass be sent to a veterinary reference laboratory for formal histopathology to check for clean margins?
Academic & Clinical References
- ACVS Surgical Principles: Oncologic Surgery and Surgical MarginsOrganization: American College of Veterinary Surgeons (ACVS) • Accessed: 2026-01-10https://www.acvs.org