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Pet of the Month – January 2016
by admin on January 4th, 2016
Category: Pet of the Month, Tags:
We are delighted to report that Hadley, who has featured in this column before for eating mussel shells is doing very well after an operation to remove two Mast cell tumours (MCT). Sadly his proclivity for eating unsuitable foodstuffs continued on December 27th when half a Christmas pudding “disappeared’! Induced emesis and intravenous fluids have thankfully settled this unwanted event.
MCT is the most common skin tumour in dogs; it can also affect other areas of the body, including the spleen, liver, gastrointestinal tract, and bone marrow. MCT represent a cancer of a type of blood cell normally involved in the body’s response to allergens and inflammation. Certain dogs are predisposed to MCT, including brachycephalic (flat-faced) breeds such as Boston Terriers, Boxers, Pugs, and Bulldogs, as well as retriever breeds, though any breed of dog can develop MCT.
When they occur on the skin, MCT vary widely in appearance. They can be a raised lump or bump on or just under the skin, and may be red, ulcerated, or swollen. In addition, many owners will report a waxing and waning size of the tumour, which can occur spontaneously, or can be produced by agitation of the tumour, causing degranulation. Mast cells contain granules filled with substances which can be released into the bloodstream and potentially cause systemic problems, including stomach ulceration and bleeding, swelling and redness at and around the tumour site, and potentially life-threatening complications, such as a dangerous drop in blood pressure and a systemic inflammatory response leading to shock.
When MCT occur on the skin, they can occur anywhere on the body. The biological behaviour of these tumours can vary widely; some may be present for many months without growing much, while others can appear suddenly and grow very quickly. The most common sites of MCT spread (metastasis) are the lymph nodes, spleen and liver.
Diagnosis can be simply achieved via a fine needle aspirate. This requires no anaesthesia and only rarely sedation. Early identification and surgical removal are key to the most favourable outcomes.
Hadley initially found the operation sites to be very itchy after surgery, something not uncommon with MCT. After removing a few of his own sutures Hadley was given additional medication, resutured and had to wear a full body suit! All is now fine.
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