In the past 10 years, ovarian tumors were found in 5 cows and 2 sows at the veterinary diagnostic laboratory of the Tottori University. The cows involved were 4 to 12 years old and two of them showed metastasis. The sows involved were multiparous Berkshire and Yorkshire and affected with hemangioma. A Holstein had granulosa- and theca-cell tumor of malignant type accompanied by luxuriant cartilage and cyst formation. Another Holstein and 2 indigenous Japanese Black cows bore granulosa-cell tumor. An indigenous Japanese Black cow showed soft fibroma.
