Two consecutive cases of urticaria pigmentosa in which an enlarged thymus gland was easily demonstrated by roentgen-ray examination came under my observation.
Three years ago I was asked by Dr. William Harvey Guy to study a case of nodular type of urticaria pigmentosa from an endocrinologic standpoint, and much to our mutual surprise we found a marked hyperplasia of the thymus gland in association with a slight adenopathy of the cervical glands. I was tempted to report this observation at that time. However, it was thought wise to wait and see what other cases might show.
On Sept. 10, 1924, a macular type of urticaria pigmentosa came under my observation with similar findings, and I feel that even though the co-appearance of these two relatively rare conditions may be coincidental, the observation is useful and worthy of record.
The comparative infrequency with which the dermatologist is faced with the thymus