A Case of Syringomyelia

History of present condition.?He at first noticed one day on the thenar eminence of the right hand one small papule which rapidly enlarged into a vesicle and in three or four days' time burst leaving a raw ulcerated surface which healed up spontaneously after about a fortnight. The vesicle and the ulcer so formed were practically painless and devoid of sensation. Another vesiclc appeared on the palmar aspect of the terminal phalanx of the right thumb and about four days later a third of the same kind and character appeared at the back of the same thumb. These two did not burst.