It has been strongly advised, and by one whom we all rightfully regard as an authority on the use of radium in malignant growths, not to employ either radium or roentgen rays in melanotic tumors.1 Like all general rules, however, it is subject to exceptions, probably even in the mind of this authority. The following case shows a fortunate outcome in transgressing the rule.
REPORT OF A CASE
History.—
Nov. 6, 1918, a physician, aged 37, consulted us in regard to a dark, slate blue, circular spot about 3 mm. in diameter, lying deep in the exposed red part of the lower lip. It was near the cutaneous border in the median line, and had been first noticed perhaps four years before. He thought it had doubled in size in the past two years. It did not clear up on pressure, but became more distinct, and there was a