Panosteitis – Canine
Papilloma – solitary – mucous membrane
Papilloma – solitary – other
Papilloma – solitary – skin (cutaneous)
Papillomas – multiple – mucous membrane
Papillomas – multiple – other
Ovine Pulmonary Adenocarcinoma ( OPA / Jaagsiekte)
Ovulation failure
Owner-directed aggression (Problem behaviour)
Pad wound (unspecified)