You’re petting your dog or cat, minding your business…

…and then your hand hits something that absolutely was not there before.

Cue the internal dialogue:

  • “Is this nothing?”
  • “Is this cancer?”
  • “Should I cancel my plans and become a full-time lump investigator?”

Or worse!  You open Google and suddenly you’re a raccoon in a dumpster fire of information.

Let’s close the tabs. Step away from the google tabs….

A lump or bump is almost always one of four things:

Not ten. Not twenty. Not “mystery mass of doom.”

Just four:

  1. Abscess (infection)
  2. Granuloma (inflammation)
  3. Cyst
  4. Neoplasia (tumor. Yes, cancer but it can be the Big C OR the little c)

Our job? Figure out which one.  And no, we don’t guess.  We use a simple test called a fine needle aspirate (we’ll get there in a minute).

Abscesses – Infection That Got Trapped

These are the “looked fine yesterday, now we have a situation” lumps.

Most commonly caused by puncture wounds (bite wounds are the classic culprit), here’s what happens:

  • Bacteria get under the skin
  • The skin seals over
  • Infection builds
  • Pus forms
  • Pressure builds

Boom. Lump.

These can show up fast, can be painful, and can look dramatic.

Treatment

  • Drain it
  • Flush it
  • Sometimes antibiotics

Not glamorous. Very effective.

Also — if we’re being honest — veterinarians love abscesses.
They’re messy, dramatic, and incredibly satisfying to fix.

We are fully aware this is not normal.

Granulomas – The Immune System Choosing Chaos

Granulomas are inflammatory tissue.

Think of them as your pet’s immune system saying:

“I have decided this is a problem… and I will now overcommit.”

This is not a calm, measured response.
This is enthusiasm.

Common causes:

  • Bug bites
  • Vaccine reactions
  • Foreign material
  • Suture reactions
  • Chronic licking (lick granulomas)

Treatment

Depends on severity:

  • Topical therapy
  • Oral anti-inflammatories
  • Injectable medications

We calm things down and let the body reset.

Cysts – The “We Acknowledge You Exist” Category

Cysts are usually benign sacs of material. Anything from fluid to thicker, waxy or “cheesy” debris produced by the skin.

Not dangerous. Occasionally… memorable.

Most of the time:

  • Not painful
  • Not dangerous
  • Not worth chasing

They fall into the category of:
 “We acknowledge your existence, but we are not rearranging our lives for you.”

Treatment

  • Often: benign neglect
  • If they rupture and won’t heal → surgical removal

We don’t remove things just because they’re there.
We remove things when they become a problem.

A Quick Word on Warts (Because Someone Will Ask)

Warts are viral, not “went viral on social media” viral, but a real papillomavirus that causes these growths to pop up.

These are especially common in older dogs and in certain breeds. Some breeds just seem more committed to the wart lifestyle than others.

Does your puppy have warts?  Still viral.

No, still not Tik Tok 3 million views viral….  just a garden variety virus. The good news is, they will usually go away on their own. We can help a little, so see us if they look bad.

And no… we don’t treat warts like human dermatology.

Why we don’t just freeze them off:

  1. Pets don’t hold still
  2. Freezing really hurts

Also, unlike humans, your dog is not going to politely leave it alone after we irritate it.
There will be licking. There will be drama. There will be regret.

What we do instead:

  • Leave them alone (most of the time)
  • Remove them if your pet is already under anesthesia (like during a dental)

Tumors (Neoplasia) – The Big C and the little c

This is the category everyone worries about.

And this is where language gets confusing.

“Mass.”
“Tumor.”
“Growth.”
“Neoplasia.”

These are all words we use for an abnormal collection of cells.
And, yes, that can be cancer.

So, what do we do with that information?

We make a plan.

Sometimes the right plan is:

  • Watch and wait:  monitoring for changes in size, shape, color, or texture
    And sometimes the right plan is:
  • Surgery

When surgery is recommended, we:

  • Surgically (under general anesthesia) remove the mass with wide margins
  • Send it to a pathologist
  • Confirm:
    • What it is
    • Whether we got it all

We don’t just remove what we can see.

We remove a margin of normal tissue around it as well… because microscopic cells can extend beyond the visible mass.

Cancer doesn’t respect boundaries.
So we plan accordingly.

That planning is what makes the difference.

And here’s the part that matters:

Sometimes we don’t know exactly what we’re dealing with until we get that pathology report back.

But once we have it.  Things become much clearer.

There’s the Big C… aggressive, invasive cancers that spread and cause problems.

And then there’s the little c,  tumors that are benign, slow-growing, and honestly more “diary of a wimpy tumor” than anything dangerous.

Most of the lumps and bumps we see fall into that little c category.

And when that’s the case?
We’re often done after surgery. Treated. Cured. Move on with life.

But if we’re dealing with the Big C?  We’ve got you.

No spiraling. No guessing.
We walk you through it, explain your options, and build a plan that makes sense for your pet and your life.  Whether that’s western medicine, eastern medicine or a combination of both.  We will educate you on your options, and their approximate costs.

That’s what we do.

 

A Quick Note on Cats (Because Cats Like to Be Different)

Cats are not small dogs.

Cats tend to read a different playbook than dogs, and we treat them accordingly.

Yes, cats can get granulomas and cysts.
But they are less likely to have the nice, boring, benign lumps we see all the time in dogs.

In dogs, many skin masses are things we monitor or manage conservatively.

In cats… we’re more cautious.

They tend to fall into two main categories:

  • Abscesses(often from bite wounds; messy, but fixable)
  • Tumors(and unfortunately, these are more likely to be aggressive)

Because of that, we take feline lumps seriously.

A lump on a cat is more likely to be something we investigate sooner rather than later.

That doesn’t mean panic.

It means don’t wait and see for too long.

If you find a lump on your cat:

  • Get it checked
  • Get it sampled
  • Get an answer

Because with cats, early information matters even more.

So… How Do We Know What We’re Dealing With?

Magic? No.  Science? Yes.

Fine Needle Aspirate (FNA)

This is where the magic happens.

We:

  • Place a tiny needle into the mass (most dogs and cats are fine with this. It really is a tiny needle)
  • Collect cells
  • Put them on a slide
  • Stain them
  • Look under a microscope

No surgery.
No big drama.

A ton of information.

This is the difference between guessing…
…and actually knowing what you’re dealing with.

We prefer knowing.

What we learn:

  • Infection → antibiotics
  • Inflammation → anti-inflammatories
  • Fat → lipoma
  • Fluid or “cheesy” material → cyst (a little gross, usually not a problem, and often best ignored)
  • Tumor → what kind and what to do next

Sometimes we get a full diagnosis.
Sometimes we get a classification and need a biopsy.

This is where veterinary medicine differs from human medicine.

People can go back and forth for multiple procedures.
Pets? We try not to do that.

If we’re anesthetizing your pet, we want to do it once… and do it right.

So, we often move straight to an excisional biopsy, removing the entire mass and sending it out for diagnosis.

The classification from the aspirate helps us decide how aggressive we need to be with margins when we surgically remove it.

With an FNA we go from guessing… to having a plan.

Let’s Talk About Lipomas (The “It’s Probably Fine… But Let’s Check” Lump)

Lipomas are fatty tumors.

  • Soft
  • Movable
  • Slow growing
  • Almost always benign (about 99%)

Lipomas are the golden retrievers of tumors.
Friendly. Chill. Not here to cause problems.

(But we still check. Because every now and then… one is not like the others.)

What we do:

  • Map them
  • Monitor them
  • Often leave them alone

Unless:

  • They affect movement
  • They’re in awkward places (like the armpit)
  • They get too large

Important reality:

Lipomas can send microscopic extensions into surrounding tissue.

So sometimes:

  • We remove them → gone
  • Sometimes we debulk → they come back slowly

Real Story (Because This Happens All the Time)

A Labrador came in with 14 lumps.

The owner said:

“They’re all fatty tumors. They feel the same.”

None had been tested.

So, I aspirated all 14.

  • 13 were lipomas
  • 1 was a mast cell tumor

We surgically removed it.

It was low grade. Little c.
Surgery was curative.

That one sample is the entire reason we don’t assume.

“Do We Really Have to Stick a Needle in It?”

Yes. Kindly. Gently. But yes.

We are not doing this for fun.

We are doing this, so you don’t lose sleep wondering what it is.

FNAs are:

  • Quick
  • Minimally invasive
  • Well tolerated
  • Incredibly informative

If you feel a lump:

Don’t guess. Let us sample it.

(Yes, there are a few we don’t aspirate. We know what we know. But most of the time? We absolutely do.)

Surgery: Let’s Talk About Safety

When we recommend removal, it’s not casual… but it’s also not reckless.

At our hospital, anesthesia protocols include:

  • Pre-anesthetic lab work
  • Age- and breed-appropriate anesthetic protocols
  • IV catheter and fluids
  • Pain management before, during, and after the procedure
  • Continuous monitoring:
    • ECG
    • Oxygen levels (SpO₂)
    • Heart rate
    • CO₂
    • Blood pressure
    • Temperature

Is anesthesia zero risk? No.

Is it dramatically safer than most people think? Yes.

In healthy pets, serious complications are uncommon, generally well under 1% when proper protocols and monitoring are used.

Especially when done with planning, monitoring, and a team that does this every day.

The Take-Home

Not all lumps are scary.
Not all lumps are harmless.

But guessing is where people get into trouble.

If you find a lump… Let us look at it.

Because peace of mind is a lot cheaper than regret.