TL;DR: A bleeding tumor on your cat is a high-priority medical issue requiring a veterinary evaluation within 24 hours, or immediate emergency care if bleeding is profuse. Professional treatment is necessary to prevent infection and determine if the growth is malignant.
What causes a tumor on my cat to start bleeding?
Finding a bleeding growth on your cat's back can be a distressing experience. In feline health, a tumor that begins to bleed—ulcerate—often indicates that the growth is expanding faster than its blood supply can support, or that the skin has become thin and fragile, making it prone to injury from scratching or grooming. While some growths are benign, such as cysts or lipomas that have become irritated, others may be malignant, such as squamous cell carcinoma or mast cell tumors. Regardless of the underlying cause, an open, bleeding wound creates a risk for secondary bacterial infections and persistent discomfort for your cat.
Is a bleeding tumor on my cat considered a veterinary emergency?
- The urgency level for a bleeding tumor is considered High, and your cat should typically be evaluated by a veterinarian within 24 hours.
- Seek immediate emergency care if the bleeding is profuse and cannot be stopped with gentle pressure.
- Professional attention is required if the tumor is actively dripping blood, emitting a foul odor, or if your cat is obsessively licking the area.
- Open tumors are painful and leave your cat vulnerable to infection, making timely intervention essential to prevent the condition from worsening.
How does taking a photo of my cat's growth help the veterinarian?
- A clear, well-lit photo allows the medical team to assess the size, color, and vascularity of the mass.
- Visual information helps the triage nurse or veterinarian determine how urgently your cat needs to be seen based on the severity of tissue breakdown.
- Sharing a photo in advance assists the clinic in preparing necessary diagnostic tools, such as fine-needle aspiration or biopsy kits, before you even arrive.
Clinical Context (Merck Veterinary Manual)
Extradural tumors are the most common spinal tumors in cats and dogs. In cats, mast cell tumors are most common and typically found in cats older than 4 years. They can develop anywhere on the body, but most commonly on the head and neck, presenting as single, alopecic nodules generally 2-3 cm in diameter that occasionally extend into the subcutaneous fat. Surgical excision is the treatment of choice, although tumors may recur after surgery and some metastasize. Recurrent tumors may respond to chemotherapy, radiation therapy, and novel small molecule targeted therapy.
Chapter: Neurology, Oncology
Source: The Merck Veterinary Manual, 11th Edition (Page 1275)