Equine sarcoids are the most common skin tumour in horses. Their management requires careful assessment, as treatment can stimulate aggressive regrowth, and welfare-positive approaches depend on location and type.
Sarcoid welfare impacts depend entirely on location, type, and progression. A small occult sarcoid on the neck causes no welfare harm and may not require treatment. A fibroblastic sarcoid around the eye or in the girth area causes pain from mechanical irritation, prevents normal function, and may progress to ulceration and secondary infection. Treatment decisions require careful assessment — the wrong intervention can transform a manageable flat sarcoid into a rapidly growing, treatment-resistant fibroblastic mass. The welfare-positive approach begins with accurate diagnosis and type classification, consultation with a specialist for periocular and difficult cases, and avoidance of any intervention that risks stimulating malevolent transformation.