Abstract
During March, 1952-September 1952, X-rayine to the leproma of humanbody, comperatively fresh, was carried out, and I observed its influences.
Consequently, there observed some changes connected with dimention of leproma, histological states etc., to be reported.
Namely, the slight reduction of leproma, increasing of the giant-cell, in the lepromtissue, increasing of thec onnective tissue, decreasing of the round cell, atrophy of nuclear observed, but change of form of bacillus leprae in the lepra-cells, furthermore, skin-injury accompanied by the X-raying was so strong that an effective influence can not be expected.