Very Common
Rare
OTHER DIAGNOSES CONSIDERED
Other conditions or ailments that might also need to be ruled out by a vet.
Diagnosis
Conditions or ailments that are the cause of a problem that you see - your observation.
Your vet may diagnose
Mast Cell Tumor
Synonyms: Mastocytosis, Mastocytoma
Summary
This is a condition that usually appears as a single large lump on the limb, neck, head or trunk of horses. It is more common in Arab horses and in male horses. The cases I have diagnosed have mostly been on the lower limbs. It affects horses of all ages.
The diagnosis is made using sampling of cells, and especially biopsy and histopathology. X-ray can be helpful with diagnosis. A characteristic of these masses on the limbs of horses is a granular appearance on a radiograph.
It can also be seen as multiple skin nodules in young foals. This usually disappears spontaneously.
The diagnosis is made using sampling of cells, and especially biopsy and histopathology. X-ray can be helpful with diagnosis. A characteristic of these masses on the limbs of horses is a granular appearance on a radiograph.
It can also be seen as multiple skin nodules in young foals. This usually disappears spontaneously.
my vet's role
Diagnostics Used
These are tests that might be helpful to make this diagnosis or further characterize the condition.
Treatments May Include
These treatments might be used to help resolve or improve this condition.
PROGNOSIS AND RELEVANT FACTORS
Surgical removal is usually curative. In rare cases, a malignant form can occur in which there is spread to other areas.my role
I might observe
You might make these observations when a horse has this condition.
Very Common
Less Common
Rare
Skills I Might Need
I might need these skills if my horse has this diagnosis.
Related References:
Samii V, O'Brien TR, Stannard AA. Radiographic features of mastocytosis in the equine limb. Equine Vet J 1997;29(1):63-66.
Cole R, Chesen AB, Poole R, et. al. Imaging diagnosis- equine mast cell tumor. Vet Radiol Ultrasound 2007: 48(1):32-34.
Riley CB, Yovich J, Howell J. Malignant mast cell tumours in horses. Aust Vet J 1991;68(10):346-47.