Raynaud's disease (Primary Raynaud's) is a rare, vasospastic disorder that typically affects women between the ages of 15-45 years with onset typically before age 30. Patients typically experience pain, numbness, and loss of finger function when exposed to cold temperatures. Vasospastic attacks may be accompanied by a triphasic color changes in the hands. The term Raynaud’s disease is often confused with Raynaud’s phenomenon; however, it is incredibly important to distinguish them. The main difference is that the cause of Raynaud’s disease is idiopathic, while patients with Raynaud’s phenomenon have an underlying collagen vascular disease that is responsible for the underlying vascular abnormalities. Management of Raynaud’s disease should be initially conservative and consist of reducing exposure to cold, smoking cessation, and stress management. For patients that fail to improve with these strategies, drug therapy may be helpful; in extreme cases, surgical intervention might be considered.1-9
Pathophysiology
- In 1862, Maurice Raynaud theorized that the disorder was due to sympathetic nervous system overactivity, and more specifically, elevated level of circulating neurotransmitters that result in an exaggerated vasoconstriction in the peripheral circulation1
- Another theory proposes that there is a local fault at the digital artery level, with digital blood vessels having an abnormal sensitivity to cold temperatures1
- A third theory suggests that increased blood viscosity and plasma fibrinogen levels may result in a stasis of the digital circulation in response to cold1
- One of the most recent theories concerns alpha-2 receptors, as individuals with Raynaud’s disease appear to have an extreme alpha-2 response to cold exposure, which results in a vasospasm and produces symptoms; it is not clear why this response is amplified, but it may be due to multiple forms of vascular stress2,4
- A fault in the local histaminergic vasodilating system has also been proposed as a possible underlying mechanism, while emotional stress and chronic exposure to vibration are believed to play a role in eliciting vasospasm2,5
Related Anatomy
- Vasospastic attacks most commonly involve the fingers and not the thumb
- Patients may also experience symptoms involving the toes, nose, ears, face, and tongue; it is uncommon for Raynaud's disease to affect only the toes and not the fingers1
Incidence and Related Conditions
- The reported incidence of Raynaud's disease is between 5-10% of the general population, making it more common than Raynaud’s phenomenon6
- Raynaud’s disease most commonly occurs in females aged 15-45 years; up to 22% of healthy young women may experience symptoms of the disorder at some point; this makes Raynaud’s disease about 4 times more common in females than in males6
- Children are rarely affected by Raynaud’s disease 7-8
Related syndromes:
- Sjögren's,
- Scleroderma (CREST)
- Thoracic outlet
- Buerger’s disease
- Angina pectoris
- Arterial obstruction
- Cryoglobulinemia
- Cold agglutinins
- Cryofibrinogenernia
- Dermatomyositis
- Dysproteinemia
- Frostbite
- Hemoglobinopathies Polycythernia vela
- Polyarteritis nodosa
- Rheumatoid arthritis
- Vibration white finger
- Upper extremity trauma
Differential Diagnosis
- Raynaud’s phenomenon (differentiating signs/symptoms):
- Onset in the mid-20s and later
- More equal distribution between male and female patients
- Usually not related to stress
- Often begins in a single digit instead of most digits
- An ischemic injury is usually involved
- Finger edema and periungual erythema are common
- No other vasomotor syndromes1