Metastatic Melanoma Appearing to Originate from the Beak of a Racing Pigeon (Columba livia)

Hiroshi Kajigaya; Katsutoshi Konagaya; Hiroyasu Ejima; Ziniti Usuda; Seikan Kodama; Jos Thone

doi:10.1637/9083-092309-Case.1

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Hiroshi Kajigaya,¹ Katsutoshi Konagaya,² Hiroyasu Ejima,³ Ziniti Usuda,⁴ Seikan Kodama,⁵ Jos Thone⁶

¹Division of Conservation Biology, Department of Applied Science, Nippon Veterinary and Lifescience University, Kyonan-cho 1-7-1, Musashino-shi, Tokyo 180-8602, Japan
²Konagaya Pigeon Clinic, 5-28-21 Higashi-cho, Koganei City, Tokyo 184-0011, Japan
³Ejima Animal Hospital/Eye Care Center, 2-1344-2 Ogawa-cho, Kodaira City, Tokyo 187-0032, Japan
⁴Usuda Dental Clinic, 133 Hara, Saku City, Nagano 385-0052, Japan
⁵KODAMA World Line, 324 Sadanomi, Nakatsu City, Oita 879-0122, Japan
⁶Jos Thone Loft, Kruisstraat 7, B-AS, Limburg 3665, Belgium

Abstract

A 12-year-old male pigeon (Columba livia) was reported to have a small lesion on the lower beak, which was diagnosed as malignant melanoma. After surgery to remove it, the general condition of the bird worsened and the bird died. Post mortem examination revealed gross, black-colored lesions in the liver, kidney, spleen, and femur bone marrow. Lesions were not found in the adrenals. Histopathologically, the neoplastic cells had a large amount of melanin pigment and showed severe anisokaryosis and prominent nucleoli. Mitotic activity was infrequent but varied considerably where it was observed.

Citation Download Citation

Hiroshi Kajigaya, Katsutoshi Konagaya, Hiroyasu Ejima, Ziniti Usuda, Seikan Kodama, and Jos Thone "Metastatic Melanoma Appearing to Originate from the Beak of a Racing Pigeon (Columba livia)," Avian Diseases 54(2), 958-960, (1 June 2010). https://doi.org/10.1637/9083-092309-Case.1

Received: 23 September 2009; Accepted: 1 February 2010; Published: 1 June 2010

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