Perivertebral B-Cell Lymphoma in a Queensland Koala (Phascolarctos cinereus adustus) with Paralytic Symptoms in the Hind Limbs

Nobuhide KIDO; Kazuya EDAMURA; Naomi INOUE; Hisashi SHIBUYA; Tsuneo SATO; Masako KONDO; Izumi SHINDO

doi:10.1292/jvms.11-0452

Clinical Pathology

Perivertebral B-Cell Lymphoma in a Queensland Koala (Phascolarctos cinereus adustus) with Paralytic Symptoms in the Hind Limbs

Nobuhide KIDO, Kazuya EDAMURA, Naomi INOUE, Hisashi SHIBUYA, Tsuneo SATO, Masako KONDO, Izumi SHINDO

Author information

Nobuhide KIDO
Kanazawa Zoological Gardens, 5–15–1 Kamariya-higashi, Kanazawa-ku, Yokohama, Kanagawa 236–0042, Japan
Nogeyama Zoological Gardens, 63–10 Oimatsu cho, Nishi-ku, Yokohama, Kanagawa 220–0032, Japan
Kazuya EDAMURA
Laboratory of Veterinary Surgery, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252–0880, Japan
Naomi INOUE
Laboratory of Veterinary Pathology, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252–0880, Japan
Hisashi SHIBUYA
Laboratory of Veterinary Pathology, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252–0880, Japan
Tsuneo SATO
Laboratory of Veterinary Pathology, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252–0880, Japan
Masako KONDO
Kanazawa Zoological Gardens, 5–15–1 Kamariya-higashi, Kanazawa-ku, Yokohama, Kanagawa 236–0042, Japan
Nogeyama Zoological Gardens, 63–10 Oimatsu cho, Nishi-ku, Yokohama, Kanagawa 220–0032, Japan
Izumi SHINDO
Kanazawa Zoological Gardens, 5–15–1 Kamariya-higashi, Kanazawa-ku, Yokohama, Kanagawa 236–0042, Japan

Keywords: computed tomography (CT), immunohistochemical, lymphoma, magnetic resonance imaging (MRI), Queensland koala

JOURNAL FREE ACCESS

2012 Volume 74 Issue 8 Pages 1029-1032

DOI https://doi.org/10.1292/jvms.11-0452

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Abstract

A male Queensland koala (Phascolarctos cinereus adustus) at Kanazawa Zoological Gardens (Kanagawa, Japan) exhibited paralytic symptoms in the hind limbs. Computed tomography and magnetic resonance imaging revealed a mass on the left ventral side of the 11th to 13th thoracic vertebrae, and the presence of myelitis or edema in the spinal cord. The koala was under anesthesia during the examination and suddenly developed ventricular fibrillation and died. Necropsy revealed a firm flat ovoid hemorrhagic mass on the vertebrae. Following a microscopic examination including immunohistochemistry, the perivertebral mass was diagnosed as B cell lymphoma. Therefore, neoplastic cell infiltration into the spinal cord may cause paralytic symptoms in the hind limbs.

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