Mass & Tumor Identification with Digital Cytology
When a lump, bump, or mass is found on or within your pet, the most important question is: what is it? Fine-needle aspiration (FNA) with cytologic analysis is the fastest, least invasive way to determine whether a mass is benign, malignant, inflammatory, or infectious — and digital cytology accelerates this process.
At Sage Veterinary Imaging (SVI), our digital cytology service uses high-resolution whole-slide scanning and board-certified pathologist interpretation to deliver rapid, accurate cytologic diagnoses. Samples collected during imaging studies or by your veterinarian are digitized and analyzed, providing diagnostic results that guide treatment decisions without delay.
SVI offers digital cytology services at our centers in Round Rock, Texas; Spring, Texas; and Sandy, Utah.
Common Mass Types We Identify
Cytology is the frontline diagnostic tool for evaluating masses in dogs and cats. By examining individual cells under the microscope, our pathologists can classify the majority of masses into specific diagnostic categories, guiding next steps for your veterinarian.
Mast Cell Tumors
Mast cell tumors are the most common malignant skin tumors in dogs and can mimic virtually any other skin mass in appearance. Cytology is highly reliable for diagnosing MCTs because mast cells have distinctive granules visible on cytologic preparations. Once diagnosed, grading and staging guide treatment decisions including surgical margins, radiation therapy, and targeted medical therapies. Digital cytology enables rapid diagnosis so treatment planning can begin without delay.
Learn more about mast cell tumors →Lipomas & Benign Masses
Many masses in pets are benign, and cytology can confirm this without surgery. Lipomas (fatty tumors) are extremely common in dogs and have characteristic cytologic features. Other benign masses including sebaceous adenomas, histiocytomas, and epidermal cysts are readily identified on cytology. Confirming benign nature through cytology can spare your pet unnecessary surgery and provide peace of mind.
Learn more about benign masses →Soft Tissue Sarcomas
Soft tissue sarcomas are a group of malignant tumors that arise from connective tissues (fat, muscle, nerve, fibrous tissue). Cytology identifies the mesenchymal (spindle cell) origin of these tumors, though specific subtyping often requires histopathologic biopsy. Early cytologic identification of a sarcoma triggers appropriate surgical planning with wide margins, staging imaging, and oncology consultation — all of which improve outcomes.
Learn more about soft tissue sarcomas →Carcinomas & Epithelial Tumors
Carcinomas — tumors of epithelial origin — are among the most common malignancies in dogs and cats. Cytology identifies the epithelial cell clusters, atypia, and other features that indicate carcinoma. Common examples include mammary tumors, squamous cell carcinoma, anal sac adenocarcinoma, and thyroid tumors. Cytologic identification guides decisions about surgery, imaging for staging (CT or MRI), and oncologic referral.
Learn more about carcinomas →Round Cell Tumors
Round cell tumors — including lymphoma, melanoma, histiocytic sarcoma, plasma cell tumors, and transmissible venereal tumors — shed cells readily and are among the easiest tumors to diagnose cytologically. Lymphoma in particular is frequently diagnosed definitively on FNA cytology, often avoiding the need for surgical biopsy. Digital cytology’s high-resolution imaging allows detailed evaluation of cell morphology for accurate classification.
Learn more about round cell tumors →Breeds Commonly Affected
Mass and tumor predispositions vary significantly by breed. Boxers, Boston Terriers, and Pugs have elevated rates of mast cell tumors. Labrador Retrievers and Dobermans commonly develop lipomas. Large-breed dogs including Great Danes and Saint Bernards are predisposed to soft tissue sarcomas. Golden Retrievers have high rates of multiple tumor types including hemangiosarcoma and lymphoma. Siamese cats are predisposed to mammary and intestinal tumors.
How Digital Cytology Helps
Digital cytology uses high-resolution whole-slide scanning to create a complete digital image of your pet’s cytology sample. This digital slide is then reviewed by a board-certified pathologist who evaluates cell types, morphology, and diagnostic features. The digital format enables rapid turnaround, easy consultation between specialists, and archival for future comparison.
When cytology samples are collected during ultrasound-guided procedures at SVI, our radiologists and pathologists collaborate directly to ensure the highest diagnostic accuracy. This integrated approach — imaging plus cytology in the same visit — accelerates the path from discovery to diagnosis.
What to Expect During Your Visit
Cytology samples are typically collected during imaging studies (ultrasound-guided FNA) or submitted by your veterinarian from in-office aspirates. Slides are prepared, stained, digitized, and reviewed by our pathologist. Most cytology reports are available within 24–48 hours.
For urgent cases, same-day preliminary impressions can often be provided to guide immediate clinical decisions. Detailed reports include the cytologic diagnosis, description of findings, and clinical recommendations.
View all conditions we diagnose →Why Choose Sage Veterinary Imaging
Get Answers for Your Pet
If your pet has a lump, bump, or mass — whether newly discovered or previously monitored — cytologic evaluation is the essential first step toward determining what it is and what to do about it.
Schedule a Cytology Consultation
Visit one of our three locations to learn more about digital cytology services and how they can help diagnose your pet’s mass.
Mass & Tumor Cytology FAQ
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Ready to Get Answers?
Digital cytology can identify your pet’s mass and guide the most effective treatment plan. Visit one of our locations to get started.