Differential Count.
| Lymphocytes | 9 | = | 2,450 |
| Large mononuclears | 13 | = | 3,540 |
| Polymorphonuclears | 78 | = | 21,220 |
| Eosinophiles | 0 | = | 0 |
| Mast cells | 0 | = | 0 |
| 100·0 |
The left knee joint was aspirated by Dr. Munro. A clear fluid of straw yellow tint was withdrawn, which yielded some fibrin on standing. The cytological examination gave the following results:—
Total Count.
| 44,800 per c. mm. (nearly all leucocytes). |
Differential Count.
| Polymorphonuclears | 92 |
| Lymphocytes | 7 |
| Large mononuclears | 1 |
| Eosinophiles | 0 |
| Basophiles | 0 |
| 100 |
Attempts at culture on broth and agar proved sterile. In addition three separate blood cultures, taken at intervals of a few days, on agar slopes and broth, all gave negative results.
In another instance of polyarticular distribution the subject was seen during the inter-paroxysmal period. He displayed auricular tophi, the crystalline content of which was verified microscopically.