Mammary gland tumors in three male dogs

  • Han, Jeong-Hee (College of Veterinary Medicine and Institute of Veterinary Science, Kangwon National University) ;
  • Kim, Kyeong-Soo (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University) ;
  • Kim, Jae-Hoon (College of Veterinary Medicine and Veterinary Medical Research Institute, Jeju National University)
  • Received : 2016.09.13
  • Accepted : 2016.11.09
  • Published : 2016.12.31


Mammary gland tumors are very rare in male dogs. In this study, four mammary gland tumors from 3 male dogs (2 intact, 1 neutered) were collected from local animal hospitals. The dogs included two purebred Shih Tzu (1 intact, 1 neutered) and one intact purebred Cocker Spaniel. The mean age of dogs with mammary gland tumors was 9 years (5-12 years). Two dogs had a solitary mass, whereas one dog had two mammary masses. Of the four tumor masses, three were observed in the fourth or fifth mammary glands, and one was observed in the third mammary gland. According to histopathologic examinations, all four mammary masses from three dogs were benign tumors including two benign mixed tumors in one case and two complex adenomas. There were no history of obesity, testicular tumors, diabetes, and sex hormonal therapy in any male dogs with mammary tumors. Surgical excision was the only reported treatment for these tumors. No recurrence or metastasis was recorded up to 25 months after surgery.


Supported by : Kangwon National University


  1. Bearss JJ, Schulman FY, Carter D. Histologic, immunohistochemical, and clinical features of 27 mammary tumors in 18 male dogs. Vet Pathol 2012, 49, 602-607.
  2. Chae HC, Byeon YE, Lee ST, Lim JH, Kweon OK, Kim WH. Mammary gland tumors treated by surgical excision: a retrospective study in 79 dogs. J Vet Clin 2007, 24, 331-336.
  3. Gilbertson SR, Kurzman ID, Zachrau RE, Hurvitz AI, Black MM. Canine mammary epithelial neoplasms: biologic implications of morphologic characteristics assessed in 232 dogs. Vet Pathol 1983, 20, 127-142.
  4. Ginn PE, Mansell JEKL, Rakich PM. Skin and appendages. In: Maxie MG (ed.). Jubb, Kennedy, and Palmer's Pathology of Domestic Animals. 5th ed. pp. 777-780, Elsevier Saunders, New York, 2007.
  5. Goldschmidt M, Pena L, Rasotto R, Zappulli V. Classification and grading of canine mammary tumors. Vet Pathol 2011, 48, 117-131.
  6. Jabara AG. Two cases of mammary neoplasms arising in male dogs. Aust Vet J 1969, 45, 476-480.
  7. Maiti SK, Kumar DKM, Kumar S, Ravindran NA, Mathew D, Palakkara S, Muthalavi MA, Kumar V. Mammary gland tumours in male dogs: a hormonal and tumour marker study. Vet Arh 2014, 84, 537-548.
  8. Misdorp W. Tumors of the mammary gland. In: Meuten DJ (ed.). Tumors in Domestic Animals. 4th ed. pp. 575-606, Iowa State University Press, Ames, 2002.
  9. Mitchell L, De la Iglesia FA, Wenkoff MS, Van Dreumel AA, Lumb G. Mammary tumors in dogs: survey of clinical and pathological characteristics. Can Vet J 1974, 15, 131-138.
  10. Moulton JE, Taylor DO, Dorn CR, Andersen AC. Canine mammary tumors. Pathol Vet 1970, 7, 289-320.
  11. Raflo CP, Diamond SS. Neoplasm of the mammary papilla in a male dog. Am J Vet Res 1980, 41, 953-954.
  12. Saba CF, Rogers KS, Newman SJ, Mauldin GE, Vail DM. Mammary gland tumors in male dogs. J Vet Intern Med 2007, 21, 1056-1059.
  13. Thomas DB. Breast cancer in men. Epidemiol Rev 1993, 15, 220-231.
  14. Walker D. Mammary adenomas in a male dog-probable oestrogenic neoplasms. J Small Anim Pract 1968, 9, 15-20.