강아지 방광 폴립·용종 자주 묻는 질문 Q&A — 보호자가 꼭 알아야 할 핵심

Dog Bladder Polyps & Growths FAQ — Key Information for Pet Owners

UrinaryQ&AMeongsiljang Veterinary Advisory Board

Early detection is crucial for bladder polyps and tumors in dogs. We’ve compiled the essential information pet owners need to know about symptoms, diagnosis, treatment, and care.

What Are Dog Bladder Polyps & Growths?

An anatomical illustration showing polyps and tumors inside a dog’s bladder

Bladder polyps in dogs are abnormal tissue growths on the bladder wall (urothelium). Chronic irritation of the bladder wall can cause it to thicken and develop polyp-like growths, known as polypoid cystitis. Although most are benign, it can be difficult to distinguish them from malignant tumors (urothelial carcinoma) without a biopsy, even if they are non-cancerous. As polyps grow, they can irritate the bladder and urethra, causing discomfort during urination. Therefore, early detection and management of underlying causes are essential. Regular check-ups and careful monitoring of symptoms at home are crucial.

Why Do Bladder Polyps & Growths Develop?

While the exact cause remains unclear, chronic irritation of the bladder wall is known to be a key factor. The most common sources of this chronic irritation are urinary tract infections (cystitis) and urinary stones. Repeated irritation can cause the urothelial cells to proliferate excessively in a benign manner, leading to thickening of the bladder wall and polypoid growths. Although hormonal changes and genetic predisposition have also been discussed, there is insufficient evidence to definitively confirm their roles. These various factors may interact in a complex manner. Therefore, it is paramount to effectively manage the underlying infections and stones.

A veterinarian examining a dog’s bladder polyp with an ultrasound.

What Are the Main Symptoms?

Bladder polyps and growths often show few early signs. However, as the condition progresses, you may notice the following symptoms. If any of these appear, please consult your veterinarian promptly.

Frequent urination: Your pet may repeatedly try to urinate.

Blood in the urine: You may notice blood mixed in the urine.

Difficulty urinating: It may take longer to urinate, or your pet may show signs of discomfort.

Urinary incontinence: There may be instances where your pet loses control over urination.

Abdominal pain: Your pet may react when touched or show reduced movement.

Signs Requiring Immediate Veterinary Care

If your pet is unable to urinate at all, shows signs of pain while urinating, has a significant amount of blood in their urine, or if their abdomen appears swollen, immediate veterinary care is necessary. These symptoms could indicate an emergency such as bladder obstruction or bleeding.

How Are They Diagnosed?

Bladder polyps are primarily diagnosed through ultrasound and cystoscopy. Ultrasound is useful for assessing the size and location of the polyp, as well as the thickness of the bladder wall. Cystoscopy allows direct visualization of the polyp and enables biopsy to determine whether it is benign or malignant. In some cases, CT or MRI scans may also be used. Multiple diagnostic tests are often performed in combination for an accurate diagnosis, with the veterinarian selecting the appropriate approach based on the individual case. Early detection significantly impacts treatment outcomes.

A veterinarian performing a cystoscopy on a puppy

What Are the Treatment Options?

The treatment approach depends on the size and location of the polyp, as well as whether it is benign or malignant. Therefore, it is essential to first perform a biopsy to accurately determine the nature of the polyp. When removing the polyp, the veterinarian will select the most appropriate method based on the dog’s condition and the polyp’s location. Additionally, if there are underlying causes such as urinary tract infections or stones, managing these concurrently is crucial to reduce the risk of recurrence. If malignancy is suspected or confirmed, further diagnostic tests and treatment may be necessary. The veterinarian will develop a comprehensive treatment plan by considering the dog’s weight, overall health status, and the specific characteristics of the polyp. After treatment, regular check-ups are important to monitor for any signs of recurrence.

A puppy recovering after bladder polyp removal surgery

How to Manage at Home

After surgery, it’s essential to follow your veterinarian’s instructions regarding medication and activity restrictions. Encourage your pet to drink plenty of water to dilute their urine and help establish a habit of frequent urination. Dietary adjustments that reduce bladder irritation can be beneficial, but rather than focusing on specific ingredients, a balanced diet and consistent long-term hydration are key. Regular check-ups are important to monitor for recurrence, and any changes in symptoms should be reported promptly. Maintaining healthy daily habits is the cornerstone of long-term management.

Comparison of Bladder Polyp & Growth Treatments

Item	Timing of Application	Advantages	Precautions
Endoscopic Resection	Small polyps, benign	Fast recovery, less pain	Possibility of recurrence
Surgical Removal	Large and deep polyps	Precise removal possible	Longer recovery period
Medication Treatment	Suspected malignancy, surgery not possible	Focused on symptom relief	Difficult to cure completely

The veterinarian selects the optimal treatment method based on the environment and condition.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Is a bladder polyp cancerous?

Most cases are benign. However, even non-cancerous growths cannot be definitively diagnosed without a tissue biopsy. Polypoid hyperplasia can be difficult to distinguish from urothelial carcinoma, so a biopsy is recommended for an accurate diagnosis.

Can it recur?

Yes, it can recur. It may come back especially if the removal wasn’t complete or if chronic inflammation or infection persists. That’s why regular check-ups are important.

How should I manage my pet’s daily routine after surgery?

For 1 to 2 weeks after surgery, limit walks and restrict your pet’s activity. Follow your veterinarian’s instructions for medication and scheduled hospital visits.

Can it be prevented?

There’s no surefire way to prevent it yet. However, the most effective approach is to carefully manage chronic cystitis (urinary tract infections) and urinary stones, while encouraging adequate water intake and regular check-ups to help catch any issues early.

Is it more common in senior dogs?

Polypoid hyperplasia of the bladder is associated with repeated bladder irritation and can occur in dogs that frequently experience cystitis or urinary stones. However, it is difficult to definitively say that it is more common at a specific age, so maintaining good bladder health regardless of age is important.