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21 April 2021 Malignant Melanoma in a Long-legged Buzzard (Buteo rufinus): Characterization of Clinical and Histologic Lesions
Cindy Braud, Océane Graillot, Antoine Leclerc, Amélie Nicolau, Nicolas Goddard, Yannick Ruel, Karin Lemberger, Baptiste Mulot
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Abstract

A 17-year-old, male long-legged buzzard (Buteo rufinus) presented for acute lethargy and black gelatinous tissue in both nostrils. Despite intensive care, the bird died within 2 days. A postmortem computed tomographic scan of the head revealed a complete obstruction of the rostral infraorbital sinus, later confirmed by necropsy. Postmortem examination also highlighted multifocal, black, infiltrating nodules of various sizes (2 mm to 2 cm in diameter) in almost all internal organs: lungs, heart (pericardium, myocardium, endocardium), kidneys, pancreas, adrenals, muscles, and bones (periosteum and medulla). Histologically, the nodules were composed of anaplastic cells containing abundant melanin pigment, consistent with a disseminated melanoma. Malignant melanomas are aggressive neoplasms frequently reported in mammals but rarely found in avian species. In Accipitridae and Falconidae, only 2 cases have been reported.

© 2021 by the Association of Avian Veterinarians
Cindy Braud, Océane Graillot, Antoine Leclerc, Amélie Nicolau, Nicolas Goddard, Yannick Ruel, Karin Lemberger, and Baptiste Mulot "Malignant Melanoma in a Long-legged Buzzard (Buteo rufinus): Characterization of Clinical and Histologic Lesions," Journal of Avian Medicine and Surgery 35(1), 80-85, (21 April 2021). https://doi.org/10.1647/1082-6742-35.1.80
Published: 21 April 2021
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