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There are color changes in the extremities. The colour may range from cyanotic blue to reddish blue. Skin becomes thin and shiny. Hair growth is reduced. Ulcerations and gangrene in the extremities are common complications, often resulting in the need for amputation of the involved extremity. [5]
Livedoid vasculopathy (LV) is an uncommon thrombotic dermal vasculopathy that is characterized by excruciating, recurrent ulcers on the lower limbs. [4] Livedo racemosa , along with painful ulceration in the distal regions of the lower extremities, is the characteristic clinical appearance.
Unless acrocyanosis results from another condition (e.g. malignancy, antiphospholipid syndrome, atherosclerosis, acute ischemic limb, bacterial endocarditis), there is no associated increased risk of disease or death, and there are no known complications. Aside from the discoloration, there are no other symptoms: no pain, and no loss of function.
Cyanosis is the change of body tissue color to a bluish-purple hue, as a result of decrease in the amount of oxygen bound to the hemoglobin in the red blood cells of the capillary bed. [1] Cyanosis is apparent usually in the body tissues covered with thin skin , including the mucous membranes , lips, nail beds , and ear lobes. [ 1 ]
Pallor: Pallor describes the loss of color to the affected limb. [8] Other skin changes can include swelling, stiffness, or cold temperature. [9] Pulselessness: A lack of pulse rarely occurs in patients, as pressures that cause compartment syndrome are often lower than arterial pressures. [5]
In advanced lipodermatosclerosis the proximal leg swells from chronic venous obstruction and the lower leg shrinks from chronic ulceration and fat necrosis resulting in the inverted coke bottle appearance of the lower leg. [7] Lipodermatosclerosis is most commonly diagnosed in middle-aged women. [3]
One of the hallmarks of Grave's disease is pretibial myxedema, myxedema of the lower limb. [2] Myxedema is more common in women than in men. [3] Myxedema can occur in: Hyperthyroidism, associated with pretibial myxedema and exophthalmos. Pretibial myxedema can occur in 1–4% of patients with Graves' disease, a cause of hyperthyroidism. [4]
Schamberg's disease is a skin disorder that causes a discoloration of the lower extremities. [4] It usually occurs in the lower extremities and rarely elsewhere. [4] This condition is caused by leaky blood vessels near the surface of the skin. [7] The cause of the leaky capillaries is usually not known. [7]