Mass Removal & Biopsy Surgery for Dogs & Cats in Chantilly, VA
Lumps and masses are common in both dogs and cats, and while many are benign, some require surgical removal for diagnosis or treatment. Removal is often recommended when a mass is enlarging, changing, becoming irritated, or interfering with normal activity.
At Nova Pets Surgical Center, each case is evaluated individually to determine whether removal is appropriate and how much tissue should be excised based on location, size, and clinical concern. When indicated, removed tissue may be submitted for biopsy (histopathology) to help determine exactly what the mass is and guide next steps when necessary
Surgical Experience You Can Trust
Dr. Masood has devoted more than 25 years to performing advanced surgical procedures in dogs and cats. Over the course of his career, he has completed hundreds of surgeries, approaching each case with disciplined technique, careful clinical judgment, and a consistent focus on patient safety and thoughtful outcomes.
Why Do Masses Develop and Grow?
Masses can develop for many reasons, and growth alone does not automatically mean a mass is cancerous. Some masses are benign growths that enlarge slowly over time. Others are inflammatory or infectious in nature and may fluctuate in size. In some cases, a mass represents abnormal tissue that can behave more aggressively and continue to enlarge or spread if left untreated.
Because different mass types can look and feel similar from the outside, the most reliable way to understand what a mass means is through diagnostic evaluation rather than assumptions.
How We Determine What a Mass Is
Evaluation often starts with a physical exam and may include sampling or testing based on the mass's size, location, and appearance.
Common diagnostic approaches include:
Fine needle aspirate (FNA): a small sample of cells collected with a needle to help guide next steps
Biopsy (histopathology): tissue evaluation, typically performed after removal, to provide a definitive diagnosis when indicated
In many cases, biopsy after removal is the most accurate way to identify the tissue type and determine whether additional monitoring or treatment is necessary.
When Is Mass Removal Recommended?
Mass removal may be recommended when a growth is increasing in size, changing in appearance, becoming irritated, or located in an area where it is repeatedly rubbed, licked, or traumatized. Removal is also commonly recommended when a mass raises concern on physical exam or based on prior diagnostic findings.
In many cases, earlier removal—when a mass is smaller and less invasive—allows for a simpler procedure and a more straightforward closure. Surgical planning is based on the mass's location, size, and degree of association with surrounding structures.
If biopsy is indicated, removal also provides the opportunity to obtain a definitive diagnosis and guide next steps appropriately.
How Mass Removal Surgery Works
Mass removal is performed under general anesthesia. Before surgery, the mass's location and characteristics are assessed to guide surgical planning and determine the most appropriate approach. When indicated, the surgical plan includes removing a margin of surrounding tissue to reduce the likelihood that abnormal cells remain behind, while still preserving healthy tissue and function in the area.
During the procedure, the mass is excised, and the surgical site is closed using techniques selected for the region and the amount of tension on the skin. Some locations require more advanced closure planning due to limited skin mobility or proximity to sensitive structures. When a biopsy is recommended, the removed tissue is submitted for histopathology to provide a definitive diagnosis.
Post-operative planning focuses on comfort, incision healing, and clear at-home instructions to support a smooth recovery.
Recovery After Mass Removal
Recovery depends on the size and location of the mass, but most pets do very well with appropriate aftercare. In general, recovery includes a period of activity restriction while the incision heals, along with monitoring of the incision and medications as prescribed.
Owners are typically advised to:
Prevent licking or chewing at the incision (often with an e-collar)
Keep activity controlled until healing is adequate
Monitor the incision for swelling, redness, or discharge
Return for recheck as recommended based on the procedure and location
Clear discharge instructions are provided, and our team remains available to address questions that arise during the healing process.
Biopsy Results and Next Steps
When a mass is submitted for biopsy (histopathology), the goal is to identify the tissue type and determine whether additional monitoring or treatment is appropriate. Results help clarify whether the mass is benign or warrants concern for more aggressive behavior.
Once results are available, we review the report with you and explain what it means in practical terms. If the findings are benign, the next step is usually straightforward: routine monitoring and a simple plan to watch the area and check for new or changing growths over time. If the diagnosis suggests a higher-risk mass, we may recommend a recheck plan that includes evaluating the surgical site for healing and any signs of regrowth, along with a focused skin and lymph node exam based on the mass location. Depending on the diagnosis, we may also recommend additional steps, such as imaging to assess for wider involvement, removal of additional tissue in the area when appropriate, or oncology consultation to guide next-step planning.
Our goal is to give you a clear plan and reduce uncertainty—so you know exactly what to monitor and what comes next.
Surgical Evaluation
If your pet has a growing, changing, or irritated mass that causes discomfort, a surgical evaluation can help determine whether removal is appropriate and what the best next step should be. During the visit, we assess the mass location and behavior, review any available diagnostic findings, and discuss whether a biopsy is recommended.
If surgery is indicated, we’ll outline the surgical plan, expected recovery, and aftercare so you know what to expect.
📞 703-378-9791
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