Selective pudendal arteriography is indicated in selected cases of male impotence when there is a strong presumption that peripheral arterial lesions are responsible for it. These lesions are classified as: (a) traumatic; (b) obstructive in thrombo-angiitis or atheroma, and (c) dysplasic. Selective arteriography will confirm the diagnosis and indicate the nature of the obstruction, its degree and extension.