28 



MASS. EXPERIMENT STATION BULLETIN 391 



to the peritoneal surfaces (Plate VIII, Figure 1). In one case there were metas- 

 tases to the lung and in another there were metastases to the heart and para- 

 thyroid. 



Three of the tumors believed to have originated in the pancreas were com- 

 posed of undifferentiated epithelial cells (Plate \ III, Figure 4), and two of these 

 had spread by extension to the serosa of the viscera. One adenocarcinoma of 

 the pancreas was found which had extended to the peritoneum, ovary, and 

 adrenals (Plate VIII, Figure 3). A small adenoma was found in the pancreas 

 of a chicken which also had a large fibrosarcoma of the pelvic cavity. 



A papillary cystadenoma was found on the lining of the posterior portion of 

 the gizzard and consisted of a cauliflower-like protuberance measuring 17 mm. 

 in diameter. 



Table 15. — Data on Seventeen Cases of Epithelioblastoma. 



*D indicates that bird died; K, that it was killed for examination. 

 **These adenomas were composed of solid masses of cells without acinar arrangement, 

 are tentatively called adenoma to indicate their benign character. 



They 



Legend for Plate I 



Figure 1. T 312. Neurogenic Sarcoma. Ventral view of spinal cord and nerves. Note the 

 large, fairly well encapsulated tumor mass apparently arising from the dorsal root ganglion of the 

 first thoracic spinal nerve. 



Figure 2. Case 425. Neurogenic Sarcoma. The tumor was located in the region of the an- 

 terior mesenteric and coeliac nerve plexuses. Note the whorl-like arrangement of cells and also 

 the irregular fissures. Magnification X 100. 



Figure 3. T 288. Neurogenic Sarcoma. Dorsal aspect of dissected specimen of spinal column 

 exposing the spinal cord. The tumor is evident as the mass surrounding both the left lumbosacral 

 nerve plexus and the left ischiadic nerve and the anterior portion of the right lumbosacral nerve 

 plexus. See Figure 4 for histology of the tumor. 



Figure 4. T 288. Neurogenic Sarcoma. The sheath of the nerve cut in cross section is in- 

 volved with the surrounding neoplasm. The nerve itself appears normal. Magnification X 60. 



Figure 5. T 307. Teratoma of the testis. A small projection of normal testicular tissue extends 

 from the lower aspect of the tumor mass. The tumor weighed 606 grams and was composed 

 of connective tissue and epithelial elements. 



