In the medical literature of this century, many authors have discussed the relationship of chronic discoid lupus erythematosus to systemic lupus erythematosus. The expressed viewpoints range from that of Belote,1 who considered chronic discoid lupus erythematosus a variant of systemic lupus erythematosus, to that of Baehr,2 who considered chronic discoid lupus erythematosus and systemic lupus erythematosus alike in name only.
In 1950, Huff, Taylor, and Keys3 stated, "Chronic discoid lupus erythematosus is accompanied by pathologic changes in arteries at some distance from the lesion." These investigators claimed that an abnormal circulation exists in the fingers of patients with chronic discoid lupus erythematosus. They were uncertain whether the altered digital blood flow was due to changes in elasticity in the arterial tree or whether it was due to abnormal activity of arteriovenous shunts. In their study of 11 patients with chronic discoid lupus
FARBER EM, MORECI AP, SAGE RD. Digital Blood Flow Rates in Lupus Erythematosus. AMA Arch Derm. 1959;79(3):340–349. doi:10.1001/archderm.1959.01560150082013