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Histiocytoma: The benign canine tumor with a not-so-friendly look and feel

Posted Sep 24 2008 12:13pm 3 Comments

Both my French bulldogs have suffered from unsightly, often-itchy and technically benign tumors we call histiocytomas.  Though histiocytomas typically resolve after two to three months, the uncertainty of this tumor’s provenance leads most vets to snip it off (or at least part of it) to ensure its benignity.

A surgical scalpeling of a “benign” mass may sound extreme to you, but since histiocytomas can be both annoying and scary, surgery is often indicated.

Annoying: Because they often show up on the head and feet, places where a perfectly round, ulcerated mass can be scratched or licked at easily.

Scary: Because it’s hard to tell if what’s just popped up on your dog’s skin (and it usually happens fast) is a nasty mast cell tumor (or some other such monster mass)…or its more easy-going cousin, the histiocytoma.

While young dogs (under three years of age) are more likely to get these, they can happen to dogs of any age. Indeed, my older Frenchie, Sophie Sue got one about a year ago. She was nine—not exactly a spring chicken. Vincent has had three. And he’s not yet two years old.

Some breeds are more predisposed. Labrador retrievers and boxers, for example. Though Frenchies aren’t on the list, perhaps they should be… (Perhaps they should be on the list for almost everything if my recent round of healthcare scares is any guide.)

Ugly and prominently placed as they typically are, most owners want histiocytomas removed. Some vets, however, will counsel owners to either wait a few weeks (especially if the dog is young and statistically less likely to be suffering from a malignant mass) or to have a simple section of it snipped (with a local anesthetic) for histopathological analysis at the pathology lab.

Other vets will even take a needle poke at it, though most pathologists find that histiocytomas are not easily disgnosed definitively through this method (cytology).

If the dog is older or the mass is especially annoying to the dog or owner, however, we remove the whole sucker and clean up the mess quickly. Unfortunately, though, this approach is more costly and usually requires general anesthesia. It’s nonetheless the approach I take for more than half of these tumors…better to be safe than sorry, right?

Still, most owners need to know they have a choice. The nervous Nellies among you (like me) are less likely to want to stare at a mass for a couple of months to see if it simply goes away. The rational or more anesthetically cautious, however, are justified in waiting—as long as their dog is young and/or hasn’t suffered from malignant masses in the past.

Whatever choice you make, consider histiocytomas an excellent foray into the world of skin tumors. It’s like a warm-up for what’s likely to come as your dog ages. And it’s not all bad. Look on the bright side: Curing cancer is sometimes just a scalpel slice away.
Comments (3)
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"Curing cancer is sometimes just a scalpel slice away." 

But histiosytoma isn't CANCER so why would you post that at the end of your article? 

Also: "an excellent foray into the world of skin tumors. It’s like a warm-up for what’s likely to come as your dog ages."

Okay so you're saying that if your dog gets a histiocytoma, that you should expect cancerous skin tumors as your dog ages? Histiosytoma can recur for some dogs, but there's no need to alarm people who are already alarmed. I understand that you feel it necessary to inform dog owners of the your opinion as to the likely future of caring for your dog, but I think it's despicable that your statements are inaccurate and ambiguously postitive. Your article ends in being the most negative out of all the articles that I've read on this subject.

I completely agree with Christina. My vet and I believe that is what my dog has and I am not too terribly excited about waiting around to see if this thing goes away. As I am trying to research on the topic, it isn't too encouraging to read facts about what it is or could be, coupled with the fact that someone is trying to make me believe that eventually my dog will just get cancer and die.
My Lab/mix has a large tumor (swelling) on his lower back.  He has had it for over 3 years.  I decided against surgery.  He also has a small sack like swelling on his lower neck.  It is loose and not attached to a bone.  I know from friends who have had dogs with similar tumors/growths that surgery did not succeed and their dogs died shortly after.
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