Eight patients are reported in whom lesions clinically simulating melanomas were histologically proved to be capillary aneurysms. It is possible that these lesions are due to noxious solar and/or roentgen irradiation. The thesis that not every black, flat, growing lesion in a melanoma is stressed. Therefore, it follows that excessive sacrifice of normal tissue is not justified unless there is histoplathologic or indisputable clinical evidence that a growth is malignant. This is not to be construed as advocating that one should minimize the black lesion on the skin nor that histologic examination is not essential in such cases.