274 DISEASES OF DOMESTICATED BIRDS 
MYXO-FIBROMA 
Koch observed tumors in a partridge which closely resembled 
avian tuberculosis. Both ceca were studded with numerous tuber- 
cules some as large as a pea. However the larger ones had a glazed 
appearance resembling cysts with gelatinous contents, while the 
smaller ones had an opaque, whitish gray appearance. Some of the 
larger tubercules showed a similar characteristic. Some of these 
were located in the intestinal wall protruding in the lumen as a 
hemisphere, without perforating the mucosa. 
Microscopic examination showed the large tubercles to be myxo- 
fibroma and the smaller ones to be a pure fibroma. 
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