Testicular Vascular Hamartoma in a Calf

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  • TOSA Susumu
    Kagawa Prefectural Eastern Regional Livestock Hygiene Service Center
  • YAMADA Manabu
    National Institute of Animal Health, National Agriculture and Food Research Organization

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  • 子牛の精巣における血管過誤腫

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Abstract

<p>The enlarged testis of a one month-old Holstein calf was histopathologically examined. The testis was histologically composed of a proliferation of various-sized muscular arteries, small arteries, arterioles and fibrous connective tissues. Stellar to spindle shaped cells proliferated within the mucous connective tissue in the lesion. The mucous connective tissue showed metachromatic staining by a toluidine blue stain. This animal was diagnosed with testicular vascular hamartoma based on the histological characteristics of the proliferation of the well-differentiated muscular arteries, small arteries, arterioles and fibrous mucous mesenchymal cells. In domestic animals, only one case of testicular vascular hamartoma has been reported in a calf, and this is the first report of testicular vascular hamartoma in a calf in Japan.</p>

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