4 MASS. EXPERIMP:NT station bulletin 308 



The Patholoijical Cell in Neurolyniphomatosis and l>ympliocytomatosis 



!■ iist coniparat i\e stiulies were made of normal birds and those shc)\\ing neuro- 

 Ixniphomatosis with gross lesions, avian paralysis without gross lesions, myelo- 

 leukosis, erythroleukosis, and lymphoc>tomatosis. In distinction from Patter- 

 son et al. (1932), little difficulty was experienced in differentiating neurohmpho- 

 matosis from er>throleukosis and myeloleukosis, while lympholeukosis appeared 

 to be closely related. The large lymphocyte observed in the infiltrated nerves 

 of neuroKmphomatosis, Fig. 1, appears to be similar to the pathological cell 

 found in 1\ luphocx tcmatosis, as stated by Matthews and W'alkex (1929). 



In this stud\' there was evidence of perivascular infiltration in which the path- 

 ological cells passed in the blood and Kmph until the\ filled the spaces between 

 the ner\-e fibers, as shown in Fig. 2. The walls of the arteries and \'eins were 



Figure 1. Pathological Cells in Neiirolymphomatosis. showing the division of the nucleus and 

 the characteristic concentric arrangement in some cells. (Magnified 1100 diameters, i 



Figure 2. Infiltration of Path;)logical Ceils around Nerve Fibers. Magnified 100 diameters, i 



