Lymphangiosclerosis, also known as sclerotic lymphangitis, is a condition where there is hardening of the lymph vessel associated with the penis. It can cause the appearance of a prominent vein either near the head of the penis or on the entire length of the shaft.
Lymphangiosclerosis - Causes, Symptoms, and Treatment
Lymphangiosclerosis is the hardening of a lymphatic vessel connected to a vein in the penis. For more details read this article.