J Vet Sci.  2006 Mar;7(1):83-85. 10.4142/jvs.2006.7.1.83.

Histology of two rice bodies isolated from the stifle of an adult draught horse stallion

• Schneider
• Heimann M
• Lejeune JP
• Verwilghen DRVG
• Deby-Dupont GP
• Serteyn DA

• KMID: 1103560
• DOI: http://doi.org/10.4142/jvs.2006.7.1.83

Abstract

In the human and equine species, different kinds of free floating intra-articular particles are related to certain disorders. Osteochondral fragments formed during osteochondrosis dissecans are the most common finding in the equine species, whereas in humans rice bodies due to rheumatoid arthritis are more frequent. Herein we report a third type of floating body inside the stifle of an adult draught horse stallion, in macroscopic appearance similar to articular rice bodies known in humans. As revealed by histologic examination, the two particles consist of polypoid degenerated structures derived from synovial villi. Their formation was probably induced by ischemia.

Keyword

joint; rice body; draught horse; synovium; histology

MeSH Terms

Animals
Histocytochemistry/veterinary
Horse Diseases/*pathology
Horses
Joint Loose Bodies/pathology/*veterinary
Male
Stifle/*pathology
Synovial Membrane/*pathology

Figure

• 

  Fig. 1 Macroscopic picture of the rice bodies. The shape and size of those structures vary slightly but both are pedunculated, attached by a thin white strand and composed of a nodular yellow tinted body.

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  Fig. 2 The rice bodies is mostly composed of benign necrotic adipose tissue. Mild fibrosis, edema and histiocytic infiltration may be seen underneath the synoviocyte lining. H&E stain, ×200. Inset, ×10.

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  Fig. 3 Picture of the synovial membrane at the base of the second body. Observe the nodular cartilaginous metaplasia (star), and the thickened arteries (arrow). H&E stain, ×100. Inset, ×10.

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