peripheral vascular disease skin vascular disease livedo reticularis MESH:D054068 MEDGEN:43223 GARD:0025876 MONDO:0044037 livedo reticularis livedo racemosa SCTID:238772004 A condition characterized by a reticular or fishnet pattern on the skin of lower extremities and other parts of the body. This red and blue pattern is due to deoxygenated blood in unstable dermal blood vessels. The condition is intensified by cold exposure and relieved by rewarming. UMLS:C0085642