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IF YOUR CAT WAS JUST DIAGNOSED WITH FELINE MULTIPLE MYELOMA,
THIS GUIDE IS FOR YOU.
IF YOUR CAT WAS JUST DIAGNOSED WITH FELINE MULTIPLE MYELOMA…
Plasma Cell Cancer • Bone Marrow Cancer • Systemic Plasma Cell Neoplasia
A diagnosis of multiple myeloma in your cat is frightening. You may have noticed weight loss, lethargy, increased thirst, or strange bloodwork changes — and now suddenly you’re facing a complex cancer of the bone marrow and immune system.
You love your cat.
You want clarity — not fear.
You want truth — not panic.
You want a plan — not chaos.
This guide is written for you:
The science-driven, deeply bonded pet parent who wants evidence-based,
compassionate, actionable guidance, grounded in 40 years of veterinary clinical
experience.
Multiple myeloma is treatable, and many cats live months to years with good quality of life when therapy begins promptly.
You are not alone.
YOU ARE NOT ALONE.
YOU ARE NOT FAILING YOUR DOG.
YOU’RE IN THE RIGHT SPOT.
I CAN HELP YOU.
AT A GLANCE: FAST FACTS ABOUT FELINE MULTIPLE MYELOMA
What it is:
A cancer of plasma cells (antibody-producing immune cells) that expands in the bone marrow and can spread to other organs.
How common is it?
Rare in cats.
Key disease features (the “CRAB” signs):
• C — Calcium elevation (hypercalcemia)
• R — Renal dysfunction (kidneys affected)
• A — Anemia
• B — Bone lesions (osteolysis)
Most common symptoms:
• Weight loss
• Increased drinking/urination
• Lethargy
• Nosebleeds
• Bone pain (sometimes)
• Visual changes (eye hemorrhage)
Is it painful?
Sometimes — especially with bone lesions or bone marrow expansion.
Life expectancy if untreated:
Weeks to a few months.
Most important first step:
Confirm diagnosis with bloodwork, serum protein electrophoresis, and bone marrow
cytology.
Most important diagnostic tests:
• CBC (anemia)
• Serum chemistry (calcium, kidney values)
• Serum protein electrophoresis (M-protein spike)
• Bone marrow aspirate
• Radiographs or CT (bone lesions)
• Urinalysis + urine electrophoresis
• Blood pressure measurement
WHAT THIS DIAGNOSIS MEANS FOR YOUR CAT
Multiple myeloma affects both the immune system and internal organs.
What is happening inside the body?
• Malignant plasma cells overproduce abnormal antibodies
• This causes high blood protein levels
• Bone marrow becomes crowded
• Normal blood cells decrease
• Kidneys become stressed
• Calcium levels may rise dangerously
• Bones may weaken or develop lesions
With treatment, these issues can often be stabilized or reversed.
Key message:
Multiple myeloma is one of the more treatable feline cancers — and many cats respond extremely well to therapy.
HOW FELINE MULTIPLE MYELOMA GROWS
1. Bone marrow infiltration
Cancerous plasma cells invade:
• Bone marrow cavities
• Long bones
• Vertebrae
• Ribs
This leads to:
• Anemia
• Low platelets
• Bone pain
• Immunosuppression
2. Organ involvement
Myeloma cells can spread to:
• Liver
• Spleen
• Kidneys
• GI tract
• Lymph nodes
• Skin (rare)
• Eyes (common secondary sign)
3. Abnormal antibody production
Tumor cells produce excessive immunoglobulins (“M-protein”), causing:
• Hyperviscosity (thick blood)
• Bleeding disorders
• Retinal hemorrhage
• Kidney damage
• Neurologic signs if severe
4. Osteolytic bone lesions
Some cats develop:
• Bone softening
• Lytic radiographic lesions
• Pain
• Pathologic fractures
Not all cats show bone lesions, but when present, they are diagnostic.
COMMON SYMPTOMS
General symptoms
• Weight loss
• Lethargy
• Poor appetite
• Increased drinking/urinating
• Vomiting
• Weakness
Signs of hyperviscosity
• Nosebleeds
• Bleeding gums
• Eye hemorrhages
• Blindness
• Seizures (rare)
Signs of bone involvement
• Pain when touched
• Difficulty jumping
• Reluctance to move
• Hunched posture
Kidney involvement
• Dehydration
• Excessive thirst
• Concentrated or dilute urine
• Elevated kidney values
Advanced signs
• Collapse
• Seizures
• Respiratory difficulty
• Pale gums
• Severe bleeding
HOW FELINE MULTIPLE MYELOMA IS DIAGNOSED
Diagnosis requires a combination of tests — no single test is sufficient.
1. CBC (Complete Blood Count)
Looks for:
• Anemia
• Low platelets
• White cell abnormalities
2. Serum Chemistry Panel
Evaluates:
• Kidney function
• Total protein
• Calcium
• Electrolytes
High total protein is a key red flag.
3. Serum Protein Electrophoresis (SPEP)
The hallmark test.
Findings:
• Monoclonal spike (“M-spike”)
• Indicates excessive production of a single immunoglobulin
4. Bone Marrow Aspirate
Confirms:
• Plasma cell infiltration
• Percentage of malignant vs normal cells
5. Radiographs or CT
Identify:
• Bone lesions
• Lytic areas
• Pathologic fractures
6. Urinalysis + Urine Protein Electrophoresis
Tests for:
• Bence-Jones proteins (light-chain immunoglobulins)
• Kidney damage
• Protein loss
7. Blood Pressure Measurement
Hypertension is common.
8. Retinal Exam
Looks for:
• Hemorrhages
• Detachment
• Hyperviscosity signs
HOW URGENT IS THIS?
What to Do Today, This Week, This Month
Today (First 24 Hours)
Urgency depends on symptoms.
Emergency if your cat has:
• Vision loss
• Severe bleeding
• Seizures
• Collapse
• Respiratory distress
• Extreme lethargy
Today you should:
• Ensure hydration
• Avoid stress
• Schedule blood tests
• Avoid NSAIDs
• Record symptoms (vomiting, urination, bleeding)
This Week
Your goals:
• Complete full diagnostic panel
• Confirm diagnosis
• Start prednisolone if recommended
• Begin chemo if indicated
• Check kidney function
• Stabilize calcium levels if high
• Start appetite support
This Month
You will:
• Continue chemo protocol
• Adjust medications
• Monitor bloodwork and protein levels
• Evaluate bone pain management
• Begin integrative oncology support
• Track weight and hydration
TREATMENT OPTIONS FOR FELINE MULTIPLE MYELOMA IN CAT
CLINICAL TRIALS FOR FELINE MULTIPLE MYELOMA
Your Clinical Trial Hub may include:
• Immunomodulators
• Proteasome inhibitors (bortezomib-like agents)
• New melphalan derivatives
• Targeted myeloma therapies
• Comparative oncology studies
IS MY CAT IN PAIN?
Pain indicators:
• Reluctance to move
• Difficulty jumping
• Crying when touched
• Hiding
• Decreased grooming
• Tense body posture
• Refusal to eat
PROGNOSIS FOR FELINE MULTIPLE MYELOMA
With melphalan + prednisolone:
1–2+ years, often with excellent quality of life.
With prednisolone alone:
2–4 months on average.
With hyperviscosity or severe kidney disease:
Prognosis more guarded; treatment can still help.
Without treatment:
Weeks to 1–2 months.
Quality of life:
Most cats experience:
• Better energy
• Improved appetite
• Comfort and affection
• Normal social behavior
• Stable hydration
WHAT YOU CAN DO AT HOME
Daily Monitoring
Track:
• Appetite
• Energy
• Water intake
• Urination frequency
• Bleeding episodes
• Vomiting
• Weight
• Eye changes
Nutrition
Use:
• Moisture-rich foods
• Moderate-protein diets (if kidney disease)
• Omega-3 supplementation
• Warming foods for aroma
Comfort Care
• Soft bedding
• Assistance with grooming
• Hydration support
• Litter box accessibility
WHAT NOT TO DO
• Do NOT delay treatment
• Do NOT use NSAIDs
• Do NOT stop prednisolone abruptly
• Do NOT feed raw diets
• Do NOT ignore nosebleeds or eye changes
• Do NOT rely solely on supplements
WHEN TO SEEK EMERGENCY CARE
Emergency signs include:
• Seizures
• Blindness
• Collapse
• Severe vomiting
• Pale gums
• Heavy bleeding
• Breathing difficulty
QUESTIONS TO ASK YOUR VETERINARIAN OR ONCOLOGIST
Bring this list:
1. Do we have a confirmed M-protein spike?
2. How severe is the bone marrow involvement?
3. Should we start melphalan + prednisolone today?
4. Are my cat’s kidneys at risk?
5. Should we run X-rays or CT to check for bone lesions?
6. How do we manage hyperviscosity?
7. What signs indicate progression?
8. How often should bloodwork be monitored?
9. Is my cat in pain?
10.What is the expected quality of life?
YOUR NEXT STEP (SUPPORT FOR THE PET PARENT)
Pet Cancer Navigator Consultation
You do NOT need to navigate this alone.
We help pet parents:
• Interpret bloodwork + electrophoresis
• Understand bone marrow findings
• Choose the best chemo protocol
• Manage kidney complications
• Build a lasting comfort and nutrition plan
• Protect your cat’s quality of life at every stage
CTAs:
• Talk With Dr. Kevin
• Upload Your Dog’s Pathology or Imaging
• Get a Personalized Cancer Roadmap
STORIES OF HOPE
After starting therapy, Poppy’s bleeding stopped and her energy returned.
With rapid stabilization and chemotherapy, Oliver regained vision and vitality.
SCIENTIFIC REFERENCES
Include:
• ACVIM plasma cell cancer guidelines
• JAVMA multiple myeloma case studies
• Veterinary bone marrow oncology literature
• UC Davis & CSU oncology protocols
• Hyperviscosity syndrome treatment dat
DOWNLOAD: YOUR FELINE MULTIPLE MYELOMA ACTION PLAN
Includes:
• Today’s action steps
• Chemo schedule overview
• Kidney support checklist
• CNS monitoring guide
• QOL scoring tool
CTA: Get Your Personalized Cancer Roadmap
FREQUENTLY ASKED QUESTIONS (SEO BLOCK)
SEO-focused FAQs include:
• How long can a cat live with multiple myeloma?
• What are signs of myeloma?
• Is myeloma painful?
• Can myeloma be cured?
• Does melphalan work in cats?
• What causes high blood protein?
YOU ARE NOT ALONE — I CAN HELP YOU MAKE THE RIGHT DECISIONS
A Pet Cancer Navigator Consultation with Dr. Kevin provides:
• A personalized treatment roadmap
• Pain control guidance
• Amputation vs limb-sparing recommendations
• Clear prognosis
• Integrative longevity planning
• Emotional support through a devastating diagnosis