NEOPLASTIC DISEASES IN CHICKENS 13 



Table 8 — Degree of Involvement in 213 Cases of Lymphocytoma 

 Figures represent percent of affected organs or tissues having the respective 



degree of involvement. Cases are grouped twice: according to form of tumor 



and on the basis of nerve involvement. 



Number of Degree of Involvement** 



Organs and 



Tissues Grade 1 Grade 2 Grade 3 Grade 4 



Involved* 



Form of Tumor 



Diffuse 387 12.9 16.5 26 9 43 7 



Nodular 66 18.2 19,7 15. i 47 



Diffuse and Nodular.. . 369 16.8 21.7 29.8 31.7 



Nerve Involvement 



No nerves involved. .. , 517 15.2 17.4 27.8 39.6 



Nerves involved 305 15.1 22.0 26.2 36.7 



Total 822 15.1 19.1 27.2 38.6 



♦Affected nerves and blood not included. 



**Graded from 1 to 4, with Grade 1 representing a small amount of tumor and Grade 4 heavy 

 infiltration. 



Table 9. — Weight of Organs Affected with Lymphocytoma, 



Mean weights expressed as percent of body weight, with standard error of the 

 mean. Figures in parentheses indicate number of observations in group. 



Mean Weight as Percent of Body Weight 



Liver Spleen Kidney Ovary 



Form of Tumor 



Diffuse 12.46± .92 .71±.06 1.19+14 1.48+.40 



(27) (21) (43) (17) 



Nodular 10.61± .94 .65±.23 .85 + . 12 .70 + .1S 



(11) (7) (10) (4) 

 Diff use and Nodular. . 9.75 + 1.20 .89+29 .79+06 .94+. 27 



(27) (21) (36) (8) 

 Nerve Involvement 



No nerves involved 11.82+ .68 .83 + .15 .93+09 .97+28 



(53) (41) (60) (19) 



Nerves involved 7.68 + 1.22 .51+12 1.12 + .22 1.69 + .45 



(12) (8) (29) (10) 



Total 11.02+64 .78+13 .99 + .08 1.22+25 



(65) (49) (89) (29) 



Organs not affected with 



Lvmphocvtoma 3.80+ .40 .30 + .05 .35 + . 01 .46 + . 21 



(9) (11) (5) (4) 



