Affiliation:
1. Laboratory of Comparative Pathology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
Abstract
A 2-year-old, male Japanese native fowl ( Gallus gallus domesticus) was presented with an inability to feed and torticollis. At a necropsy, there were cylindrical enlargements and yellow discoloration of multiple peripheral nerves, including nerves of the lumbosacral plexus, brachial plexus, and spinal ganglia. On histologic examination, these lesions consisted of diffuse proliferations of spindle cells with characteristic onion bulb-like structures around residual axons. The spindle cells were immunohistochemically positive for glucose transporter 1 (GLUT1) and negative for S-100 α/β proteins. On the basis of microscopic, histologic, and immunohistochemical findings, the tumors were diagnosed as multiple perineuriomas.
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