https://phaidra.vetmeduni.ac.at/o:5422 Spontaneous regression of equine sarcoids is an exceptional event Brandt, Sabine Sabine Brandt 0000-0002-3837-3422 University of Veterinary Medicine Vienna. Clinical Centre for Equine Health and Research Wiley journal article open access eng Sarcoids are benign, yet locally aggressive skin tumours that commonly affect horses and other equid species. The lesions are induced by bovine papillomavirus types 1, 2, and probably 13 in conjunction with other factors including trauma and a genetic predisposition. Although sarcoids have a substantial impact on the health and welfare of affected equids, information on the immune response to bovine papillomavirus infection and resulting sarcoids is limited. However, there is evidence that sarcoid disease is associated with an impaired immune response to bovine papillomavirus infection. This observation agrees with the common perception of sarcoids as persistent lesions. Contrary to this general view, there are reports on the spontaneous regression of skin tumours diagnosed as sarcoids, giving rise to the question whether sarcoids can self-resolve, and if so, under which circumstances. This review addresses this unresolved issue. Bovine Papillomavirus Equid Species Horse Immune Response Sarcoid Spontaneous Regression http://creativecommons.org/licenses/by/4.0/ https://phaidra.vetmeduni.ac.at/api/object/o:5422/download 10.1002/evj.70158 https://phaidra.vetmeduni.ac.at/o:605 application/pdf Equine Veterinary Journal issn:0425-1644 VoR Equine Veterinary Journal 58 4 258.26 kB 2026