Xanthoma

See also: Xanthelasma
Xanthoma

Photograph of patient's knee showing multiple xanthoma tuberosum [1]
Classification and external resources
Specialty gastroenterology
ICD-10 E78.2 (ILDS E78.280), K13.4
ICD-9-CM 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 that can appear anywhere in the body in various disease states.[2] They are cutaneous manifestations of lipidosis in which lipids accumulate in large foam cells within the skin.[2] 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 hyperlipidemia.

Types

Xanthelasma

Main article: Xanthelasma
Histology picture of xanthoma showing lipid-laden foam cells with large areas of cholesterol clefts, 10 × magnification, eosin and hematoxilin stain[3]

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.[4] Still, it is often classified simply as a subtype of xanthoma.[5]

Xanthoma tuberosum

Xanthoma tuberosum (also known as tuberous xanthoma) is characterized by xanthomas located over the joints.[2]:530

Xanthoma tendinosum

Xanthoma tendinosum (also tendon xanthoma or tendinous xanthoma[6]) is clinically characterized by papules and nodules found in the tendons of the hands, feet, and heel.[2]:531 Also associated with familial hypercholesterolemia (FH).[7]


Eruptive xanthoma

Eruptive xanthoma (ILDS E78.220) is clinically characterized by small, yellowish-orange to reddish-brown papules that appear all over the body.[2]:531 It tends to be associated with elevated triglycerides [8]

Xanthoma planum

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.[2]:531

Palmar xanthoma

Palmar xanthoma is clinically characterized by yellowish plaques that involve the palms and flexural surfaces of the fingers.[2]: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

Tuberoeruptive xanthoma (ILDS E78.210) is clinically characterized by red papules and nodules that appear inflamed and tend to coalesce.[2]:532 Tuberous xanthomata are considered similar, and within the same disease spectrum as eruptive xanthomata.[6]

Other types

Other types of xanthoma identified in the Medical Dictionary include:[9]

See also

References

  1. ↑ Kumar et al. Cases Journal 2008
  2. 1 2 3 4 5 6 7 8 James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0.
  3. ↑ Kumar et al. Cases Journal 2008
  4. ↑ Shields, Carol; Shields, Jerry (2008). Eyelid, conjunctival, and orbital tumors: atlas and textbook. Hagerstwon, MD: Lippincott Williams & Wilkins. ISBN 0-7817-7578-7.
  5. ↑ thefreedictionary.com > xanthelasma Citing: The American Heritage Medical Dictionary Copyright 2007, 2004 and Mosby's Medical Dictionary, 8th edition. 2009
  6. 1 2 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.
  7. ↑ van den Bosch, Harrie C.M.; Vos, Louwerens D. (1998). "Achilles'-Tendon Xanthoma in Familial Hypercholesterolemia". New England Journal of Medicine 338 (22): 1591–1591. doi:10.1056/NEJM199805283382205. ISSN 0028-4793. PMID 9603797.
  8. ↑ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3030216/
  9. ↑ "Xanthoma". Medical Dictionary - Dictionary of Medicine and Human Biology. Retrieved 2015-02-05.

External links

Look up xanthoma in Wiktionary, the free dictionary.
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