Other Vascular Disorders

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Last modified 05/03/2015

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87

Other Vascular Disorders

This chapter covers a range of vascular disorders from livedo reticularis to common vascular ectasias such as venous lakes and telangiectasias. Additional disorders characterized by proliferation of blood vessels are covered in Chapters 85 (infantile hemangiomas and vascular malformations) and 94 (vascular neoplasms).

Livedo Reticularis

Blue-violet netlike pattern that reflects an increase in deoxygenated blood within the venous plexus of the skin (Fig. 87.1); this increase can be due to a number of causes, including vasospasm of arterioles supplying the skin and sluggish flow due to hypercoagulability or luminal pathology.

A common physiologic vasospastic response to cold that resolves with rewarming, as well as a sign of a number of systemic diseases, from severe atherosclerosis to systemic lupus erythematosus (Table 87.1; Fig. 87.2).

Most commonly observed on the legs but may be more widespread, especially in the setting of systemic diseases.

DDx: early phase of erythema ab igne; viral exanthems (e.g. erythema infectiosum), retiform purpura and necrosis due to more complete disruption of blood flow (Fig. 87.3; see Chapter 18); underlying etiologies are outlined in Table 87.1.

Rx: can improve with treatment of an underlying systemic disorder; no treatment currently available for the idiopathic form.

Flushing

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