Xanthoma

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See also: Xanthelasma
Xanthoma
Classification and external resources
Xanthoma.jpg
Photograph of patient's knee showing multiple xanthoma tuberosum. Kumar et al. Cases Journal 2008
ICD-10 E78.2 (ILDS E78.280), K13.4
ICD-9 272.2
DiseasesDB 28524
MedlinePlus 001447
eMedicine derm/461
MeSH D014973

A xanthoma (pl. xanthomas or xanthomata) (condition: xanthomatosis), from Greek xanthos, ξανθος, "yellow", is a deposition of yellowish cholesterol-rich material in tendons or other body parts in various disease states.[1] They are cutaneous manifestations of lipidosis in which there is an accumulation of lipids in large foam cells within the skin.[1]

They are associated with hyperlipidemias, both primary and secondary types.

Tendon xanthomas are associated with Type II hyperlipidemia, chronic biliary tract obstruction, and primary biliary cirrhosis.

Palmar xanthomata and tuboeruptive xanthomata (over knees and elbows) occur in Type III hyperlipidaemia

Types[edit]

Xanthelasma[edit]

Main article: Xanthelasma
Histology picture of xanthoma showing lipid laden foam cells with large areas of cholesterol clefts, 10 × magnification, eosin and hematoxilin stain. Kumar et al. Cases Journal 2008

A xanthelasma is a sharply demarcated yellowish collection of cholesterol underneath the skin, usually on or around the eyelids. Strictly, a xanthelasma is a distinct condition, only being called a xanthoma when becoming larger and nodular, assuming tumorous proportions.[2] Still, it is often classified simply as a subtype of xanthoma.[3]

Xanthoma tuberosum[edit]

Xanthoma tuberosum (also known as tuberous xanthoma) is characterized by xanthomas located over the joints.[1]:530

Xanthoma tendinosum[edit]

Xanthoma tendinosum (also tendon xanthoma or tendinous xanthoma[4]) is clinically characterized by papules and nodules found in the tendons of the hands, feet, and achilles.[1]:531 Also associated with familial hypercholesterolemia (FH).[5]

Eruptive xanthoma[edit]

Eruptive xanthoma (ILDS E78.220) is clinically characterized by small, yellowish-orange to reddish-brown papules that appear all over the body.[1]:531 It tends to be associated with elevated triglycerides [6]

Xanthoma planum[edit]

Xanthoma planum (ILDS D76.370), also known as "Plane xanthoma", is clinically characterized by macules and plaques spread diffusely over large areas of the body.[1]:531

Palmar xanthoma[edit]

Palmar xanthoma is clinically characterized by yellowish plaques that involve the palms and flexural surfaces of the fingers.[1]:531 Plane xanthomas are characterised by yellowish to orange, flat macules or slightly elevated plaques, often with a central white area which may be localised or generalised. They often arise in the skin folds, especially the palmar creases. They occur in hyperlipoproteinaemia type III and type IIA, and in association with biliary cirrhosis. The presence of palmar xanthomata, like the presence of tendinous xanthomata, is indicative of hypercholesterolaemia.

Tuberoeruptive xanthoma[edit]

Tuberoeruptive xanthoma (ILDS E78.210) is clinically characterized by red papules and nodules that appear inflamed and tend to coalesce.[1]:532 Tuberous xanthomas are considered similar, and within the same disease spectrum as eruptive xanthomas.[4]

See also[edit]

References[edit]

  1. ^ a b c d e f g h James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0. 
  2. ^ Shields, Carol; Shields, Jerry (2008). Eyelid, conjunctival, and orbital tumors: atlas and textbook. Hagerstwon, MD: Lippincott Williams & Wilkins. ISBN 0-7817-7578-7. 
  3. ^ thefreedictionary.com > xanthelasma Citing: The American Heritage Medical Dictionary Copyright 2007, 2004 and Mosby's Medical Dictionary, 8th edition. 2009
  4. ^ a b Rapini, Ronald P.; Bolognia, Jean L.; Jorizzo, Joseph L. (2007). Dermatology: 2-Volume Set. St. Louis: Mosby. pp. 1415–16. ISBN 1-4160-2999-0. 
  5. ^ Van Den Bosch, Harrie C.M.; van den Bosch, Harrie C.M. and D. Vos, Louwerens (May 28, 1998). "Achilles'-Tendon Xanthoma in Familial Hypercholesterolemia". New England Journal of Medicine 338 (22): 1591. doi:10.1056/NEJM199805283382205. PMID 9603797. Retrieved 5 April 2013. 
  6. ^ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3030216/

External links[edit]