Ovarian (Granulosa cell tumours) are uncommon but well recognised in mares. Mares with such a condition usually suffer from behavioural abnormalities particularly stallion like behaviour due to changes in their hormonal status. The advent of laparoscopy (camera into the abdomen) and a specialised instrument for sealing large blood vessels means that nowadays these tumours can usually be removed from the horse under standing sedation and not general anaesthesia. This is much better for the patient (shorter recovery time) and surgeon (wounds smaller, heal better with less complications).
These images show such a case. The first picture shows the laparoscopy in progress. The second shows an image seen through the laparoscope (the forceps are grasping the tumour/ovary which is about to be removed through the flank). The third image shows the removed enlarged ovary and the last shows how well the body wall is healing six days after surgery.