My horse has been diagnosed with this. It’s bumps under her skin. It has been diagnosed through biopsy/PCR and bloodwork. I’m assuming they’re correct. Treatment has been 2.4 g of itraconazole for four months. They are still growing. My mare is healthy otherwise, but no vet or internal medicine vet or anyone or even answer me back never mind try to help me. Other than my own vet who is at a loss other than the treatment that the lab suggested. I will attach photos, this is a small group of people so perhaps someone has some experience
TIA
