Spontaneous Pinealoma in a Male Crj:CD (SD) IGS Rat

Satoshi FURUKAWA; Kiyoshi KOBAYASHI; Koji USUDA; Tohru TAMURA; Yasuo MIYAMOTO; Kenichi HAYASHI; Seiichi IKEYAMA; Masanobu GORYO; Kosuke OKADA

doi:10.1292/jvms.61.41

Satoshi FURUKAWA, Kiyoshi KOBAYASHI, Koji USUDA, Tohru TAMURA, Yasuo MIYAMOTO, Kenichi HAYASHI, Seiichi IKEYAMA, Masanobu GORYO, Kosuke OKADA

Author information

Satoshi FURUKAWA
Shiraoka Research Station of Biological Science, Nissan Chemical Industries, Ltd., Shiraoka, Saitama, 349-0294 and Department of Veterinary Pathology, Faculty of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
Kiyoshi KOBAYASHI
Shiraoka Research Station of Biological Science, Nissan Chemical Industries, Ltd., Shiraoka, Saitama, 349-0294, Japan
Koji USUDA
Shiraoka Research Station of Biological Science, Nissan Chemical Industries, Ltd., Shiraoka, Saitama, 349-0294, Japan
Tohru TAMURA
Shiraoka Research Station of Biological Science, Nissan Chemical Industries, Ltd., Shiraoka, Saitama, 349-0294, Japan
Yasuo MIYAMOTO
Shiraoka Research Station of Biological Science, Nissan Chemical Industries, Ltd., Shiraoka, Saitama, 349-0294, Japan
Kenichi HAYASHI
Shiraoka Research Station of Biological Science, Nissan Chemical Industries, Ltd., Shiraoka, Saitama, 349-0294, Japan
Seiichi IKEYAMA
Department of Veterinary Pathology, Faculty of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
Masanobu GORYO
Department of Veterinary Pathology, Faculty of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan
Kosuke OKADA
Department of Veterinary Pathology, Faculty of Agriculture, Iwate University, Morioka, Iwate 020-8550, Japan

Keywords: Crj:CD (SD) IGS, pinealoma (benign), pinealoma (spontaneous)

JOURNAL FREE ACCESS

1999 Volume 61 Issue 1 Pages 41-44

DOI https://doi.org/10.1292/jvms.61.41

Details

Abstract

A pinealoma (benign) was found in a 61-week-old male Crj:CD (SD) IGS rat. The neoplasm was located between the cerebral hemispheres and the cerebellum. Histologically, the tumor cells consisted of two cell types: large, pale-staining cells and small dark-staining cells. A fibrovascular stroma divided the tumor cells into incomplete lobules or nest structures. Relatively numerous mitoses were noted in the tumor cells. Ultrastructurally, the tumor cells contained dense-cored vesicles, approximately 120 nm in diameter.

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