Abdominal Masses & Cancer Staging in Dogs & Cats
Discovering that your pet has an abdominal mass can be frightening. Understanding what the mass is, where exactly it is, and whether it has spread is critical for determining the best treatment path — and CT imaging provides these answers more completely than any other modality.
At Sage Veterinary Imaging (SVI), our 128-slice CT scanner produces contrast-enhanced, cross-sectional images of the entire abdomen and chest in a single session, giving your veterinarian a comprehensive picture of the disease. CT reveals the mass origin, size, vascular involvement, lymph node status, and distant metastasis — all the information needed for accurate staging and surgical planning.
SVI offers advanced CT imaging at our centers in Round Rock, Texas; Spring, Texas; and Sandy, Utah.
Common Abdominal Conditions We Diagnose
Abdominal masses in dogs and cats can arise from virtually any organ. The challenge lies in determining the mass origin, characterizing its behavior, and assessing whether disease has spread. CT addresses all of these questions in a single rapid study.
Liver & Splenic Masses
Liver and splenic masses are among the most common abdominal tumors in dogs. CT with contrast enhancement reveals the number, size, and location of masses within each organ, differentiates between solid and cystic lesions, and identifies vascular invasion that may affect surgical resectability. For splenic masses, CT helps distinguish between benign conditions like hematoma or nodular hyperplasia and malignant tumors like hemangiosarcoma — information that directly impacts surgical decision-making.
Learn more about liver and splenic masses →Lymphadenopathy & Lymph Node Staging
Enlarged abdominal lymph nodes can indicate lymphoma, metastatic cancer, or reactive inflammatory processes. CT identifies enlarged nodes throughout the abdomen — including deep nodes around the aorta, iliac vessels, and mesenteric root that cannot be felt on physical exam or reliably seen on ultrasound. For lymphoma patients, CT provides comprehensive staging by evaluating every lymph node station in the abdomen and chest simultaneously.
Learn more about lymphadenopathy →Adrenal Tumors
Adrenal tumors can be incidental findings or the cause of significant endocrine dysfunction (Cushing’s disease, hyperaldosteronism). CT is the best modality for evaluating adrenal masses because it clearly shows the relationship between the tumor and the adjacent vena cava — a critical factor in surgical planning. Vascular invasion by adrenal carcinoma or pheochromocytoma can make surgery significantly more complex, and CT identifies this involvement before the surgeon operates.
Learn more about adrenal tumors →Retroperitoneal Masses
The retroperitoneal space — behind the abdominal cavity — contains the kidneys, ureters, adrenal glands, and major blood vessels. Masses in this region can be difficult to evaluate with ultrasound alone due to their depth and location. CT provides clear visualization of retroperitoneal tumors, their relationship to the kidneys and ureters, vascular involvement, and whether the mass can be safely resected. This is particularly important for renal tumors where preserving the contralateral kidney’s blood supply is essential.
Learn more about retroperitoneal masses →Pre-Surgical Cancer Staging
Comprehensive cancer staging often requires evaluating both the primary tumor and potential sites of metastasis. CT excels at this because the abdomen and chest can be scanned in the same session, providing a complete picture of disease extent. This “whole-body” approach identifies lung metastases, liver involvement, lymph node enlargement, and peritoneal disease in a single visit — information that determines whether surgery, chemotherapy, radiation, or palliative care is the most appropriate treatment path.
Learn more about cancer staging →Breeds Commonly Affected
Abdominal tumors affect all breeds, but certain breeds face elevated risk. Golden Retrievers, Labrador Retrievers, and German Shepherds have higher rates of splenic hemangiosarcoma. Rottweilers and Flat-Coated Retrievers are predisposed to histiocytic sarcoma. Boxers and Boston Terriers have increased risk for mast cell tumors that may spread to abdominal organs. Large-breed dogs are more commonly affected by adrenal tumors and renal carcinoma.
How CT Imaging Helps
CT with intravenous contrast enhancement is the gold standard for abdominal mass evaluation and cancer staging. Contrast injection highlights blood vessels and reveals the vascularity of masses, helping radiologists determine the organ of origin, assess surgical resectability, and identify vascular invasion. Our 128-slice scanner captures the entire abdomen in seconds, minimizing anesthesia time while maximizing diagnostic detail.
Each study is reviewed by our board-certified veterinary radiologists, who provide detailed staging reports and work directly with your veterinarian or oncologist to guide treatment decisions.
What to Expect During Your Visit
Abdominal CT scans typically include both pre-contrast and post-contrast image sets to fully characterize masses and assess their blood supply. The scan itself takes less than 5 minutes. Your pet will be under brief general anesthesia, and an IV catheter is placed for contrast injection. When whole-body staging is needed, the chest is scanned in the same session.
Results are interpreted by a board-certified veterinary radiologist, and your veterinarian typically receives a detailed staging report the same day.
Learn more about veterinary CT at Sage →Why Choose Sage Veterinary Imaging
Get Answers for Your Pet
If your pet has been diagnosed with an abdominal mass, or if your veterinarian suspects cancer that may require staging, advanced CT imaging provides the comprehensive information needed to determine the best treatment approach.
Schedule a Diagnostic CT Scan
Visit one of our three locations to learn more and schedule your pet’s abdominal imaging or cancer staging study.
Abdominal Imaging & Cancer Staging FAQ
Ready to Get Answers?
Advanced CT imaging can reveal the full picture of your pet’s abdominal condition and provide the staging information needed to guide treatment. Visit one of our locations to get started.