Medicine:Livedo reticularis

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Livedo reticularis
Livedo reticularis of left leg.jpg
Livedo reticularis secondary to obscure severe infrarenal aortoiliac stenosis with severe transient lactic acidosis.
SymptomsPurpura, mottling of the skin, blood clots, skin discoloration
CausesAutoimmune diseases, hyperlipidemia, poisons, drug abuse

Livedo reticularis is a common skin finding consisting of a mottled reticulated vascular pattern that appears as a lace-like purplish discoloration of the skin.[1] The discoloration is caused by reduction in blood flow through the arterioles that supply the cutaneous capillaries, resulting in deoxygenated blood showing as blue discoloration. This can be a secondary effect of a condition that increases a person's risk of forming blood clots, including a wide array of pathological and nonpathological conditions. Examples include hyperlipidemia, microvascular hematological or anemia states, nutritional deficiencies, hyper- and autoimmune diseases, and drugs/toxins.

The condition may be normal or related to more severe underlying pathology.[2] Its differential diagnosis is broadly divided into possible blood diseases, autoimmune (rheumatologic), cardiovascular diseases, cancers, and endocrine disorders. It can usually (in 80% of cases) be diagnosed by biopsy.[3]

It may be aggravated by exposure to cold, and occurs most often in the lower extremities.[4]

The condition's name derives from the Latin livere which means bluish, and reticular which refers to the net-like pattern.[5]

Causes

A number of conditions may cause the appearance of livedo reticularis:

  • Cutis marmorata telangiectatica congenita, a rare congenital condition
  • Sneddon syndrome – association of livedoid vasculitis and systemic vascular disorders, such as strokes, due to underlying genetic cause[6]
  • Idiopathic livedo reticularis – the most common form of livedo reticularis, completely benign condition of unknown cause affecting mostly young women during the winter:[7] It is a lacy purple appearance of skin in extremities due to sluggish venous blood flow. It may be mild, but ulceration may occur later in the summer.[8]
  • Secondary livedo reticularis:

Diagnosis

Livedo reticularis is diagnosed by its clinical appearance and history. No further test or examination confirms idiopathic livedo reticularis. However, further investigations may be undertaken where an underlying cause is suspected such as skin biopsies, or blood tests for antibodies associated with antiphospholipid syndrome or systemic lupus erythematosus.[46]

Treatment

Other than identifying and treating any underlying conditions in secondary livedo,[47] idiopathic livedo reticularis may improve with warming the area.

See also

  • Livedoid dermatitis
  • Livedo racemosa
  • Perinatal gangrene of the buttock
  • erythema ab igne (AKA livedo recticularis e calore) - a rash caused by prolonged heat exposure (e.g. hot water bottle or heat pad)
  • List of cutaneous conditions

References

  1. Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. p. 1615. ISBN 978-1-4160-2999-1. 
  2. "livedo reticularis" at Dorland's Medical Dictionary
  3. Kroshinsky; Stone, John H.; Bloch, Donald B.; Sepehr, Alireza (February 2009). "Case 5-2009 — A 47-Year-Old Woman with a Rash and Numbness and Pain in the Legs". New England Journal of Medicine 360 (7): 711–20. doi:10.1056/NEJMcpc0807822. PMID 19213685. 
  4. James, William D.; Elston, Dirk; Treat, James R.; Rosenbach, Misha A.; Neuhaus, Isaac (2020). "35.Cutaneous vascular diseases" (in en). Andrews' Diseases of the Skin: Clinical Dermatology (13th ed.). Edinburgh: Elsevier. p. 817. ISBN 978-0-323-54753-6. https://books.google.com/books?id=UEaEDwAAQBAJ&pg=PA817. 
  5. Sundriyal, Deepak; Kumar, Naveen; Kumar, Gaurav; Walia, Meenu (15 May 2014). "Livedo reticularis heralding hypercalcaemia of malignancy". BMJ Case Reports 2014 (may14 4): bcr2013201371. doi:10.1136/bcr-2013-201371. PMID 24832704. 
  6. "Cerebro-Vascular Lesions And Livedo Reticularis". British Journal of Dermatology 77 (4): 180–5. April 1965. doi:10.1111/j.1365-2133.1965.tb14628.x. PMID 14278790. 
  7. Gibbs, Mark B.; English, Joseph C.; Zirwas, Matthew J. (2005). "Livedo reticularis: an update". J Am Acad Dermatol 52 (6): 1009–19. doi:10.1016/j.jaad.2004.11.051. PMID 15928620. 
  8. "Livedo reticularis with summer ulcerations". AMA Arch Dermatol 72 (1): 31–42. 1955. doi:10.1001/archderm.1955.03730310033007. PMID 14387292. 
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  13. Fox, Michelle; Tahan, Steven; Kim, Caroline C. (2012). "Livedo Reticularis: A Side Effect of Interferon Therapy in a Pediatric Patient with Melanoma". Pediatric Dermatology 29 (3): 333–5. doi:10.1111/j.1525-1470.2011.01426.x. PMID 21575046. 
  14. Cruz, Boris Afonso; de Queiroz, Eustáquio; Nunes, Simone Vilela; Cruz Filho, Achiles; Campos, Gilberto Belisario; de Carvalho Monteiro, Ernesto Lentz; Crivellari, Humberto (2000). "Fênomeno de Raynaud grave associado a terapia com interferon-beta para esclerose múltipla: relato de caso" (in pt). Arquivos de Neuro-Psiquiatria 58 (2B): 556–9. doi:10.1590/S0004-282X2000000300025. PMID 10920422. 
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  19. "Livedo reticularis and digital infarcts: a syndrome due to cholesterol emboli arising from atheromatous abdominal aortic aneurysms". Vasc Dis 3 (1): 12–24. 1966. PMID 5903590. 
  20. "Les manifestations cutanées des emoblies de critaux de cholestérol" (in fr). Ann Dermatol Venereol 104 (1): 5–8. 1977. PMID 843026. 
  21. Buckley, Sarah A.; Lessing, Juan N.; Mark, Nicholas M. (2013). "Livedo Reticularis in a Patient with Pheochromocytoma Resolving After Adrenalectomy". The Journal of Clinical Endocrinology & Metabolism 98 (2): 439–40. doi:10.1210/jc.2012-2842. PMID 23275529. 
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