From Medical News Today:
During a recent presentation made before a regional meeting of the American Cancer Society in Roanoke, Robertson discussed his use of Frankincense oil as a possible treatment for malignant melanoma in horses.
The risk factors for malignant melanoma in people and horses are very similar, according to Robertson. In people, they include pale complexion and hair, exposure to excessive sunlight and sunburns, and aging. Horses at risk also have a pale coat of grey to white, and there seems to be a correlation to aging, which could be a result of chronic exposure to sunlight. In each, the disease is an infiltrated pigmented malignancy that is difficult to manage. Conventional therapies include chemotherapy, radiation, immunotherapy, and surgery.
The disease often affects horses with the development of lesions on the lips, neck, and perineal area.