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Xanthelasma
View on Wikipediafrom Wikipedia
| Xanthelasma | |
|---|---|
| Other names | xanthelasma palpebrarum; xanthoma palpebrarum |
 | |
| Pronunciation | |
| Specialty | Ophthalmology  |
Xanthelasma is a sharply demarcated yellowish deposit of cholesterol underneath the skin.[1] It usually occurs on or around the eyelids (xanthelasma palpebrarum, abbreviated XP).[1][2] While they are neither harmful to the skin nor painful, these minor growths may be disfiguring and can be removed.[1] There is a growing body of evidence for the association between xanthelasma deposits and blood low-density lipoprotein levels and increased risk of atherosclerosis.[3][4]
A xanthelasma may be referred to as a xanthoma when becoming larger and nodular, assuming tumorous proportions.[5] Xanthelasma is often classified simply as a subtype of xanthoma.[6]
Diagnosis
[edit]Xanthelasma in the form of XP can be diagnosed from clinical impression, although in some cases it may need to be distinguished (differential diagnosis) from other conditions, especially necrobiotic xanthogranuloma, syringoma, palpebral sarcoidosis, sebaceous hyperplasia, Erdheim–Chester disease, lipoid proteinosis (Urbach–Wiethe disease), and the syndrome of adult-onset asthma and periocular xanthogranuloma (AAPOX).[2] Differential diagnosis can be accomplished by surgical excision followed by microscopic examination by a pathologist (biopsy to determine histopathology).[2] The typical clinical impression of XP is soft, yellowish papules, plaques, or nodules, symmetrically distributed on the medial side of the upper eyelids; sometimes the lower eyelids are affected as well.[2]
Treatment
[edit]Xanthelasmata can be removed with a trichloroacetic acid peel, surgery, lasers or cryotherapy.[2] Removal may cause, although uncommon, scarring and pigment changes.[citation needed]
Prognosis
[edit]Recurrence is common: 40% of patients with XP had recurrence after primary surgical excision, 60% after secondary excision, and 80% when all four eyelids were involved. A possible cause might be insufficiently deep excisions.[2]
Epidemiology
[edit]Xanthelasma is a rare disorder in the general population, with a variable incidence of 0.56 to 1.5% in western developed countries. The age of onset ranges from 15 to 75, with a peak in the 4th to 5th decades of life. There also seems to be a greater prevalence in females, but this might be due to higher consciousness to cosmetic defects.[7]
Etymology
[edit]The word is derived from Greek xanthós, ξανθός 'yellow' and élasma, έλασμα, 'foil'. The plural is xanthelasmata.[citation needed]
See also
[edit]- Xanthoma, a similar collection of cholesterol around tendons
- List of xanthoma variants associated with hyperlipoproteinemia subtypes
References
[edit]- ^ a b c Frew JW, Murrell DF, Haber RM (October 2015). "Fifty shades of yellow: a review of the xanthodermatoses". International Journal of Dermatology. 54 (10): 1109–1123. doi:10.1111/ijd.12945. PMID 26227781.
- ^ a b c d e f Nair PA, Singhal R (2017-12-18). "Xanthelasma palpebrarum - a brief review". Clinical, Cosmetic and Investigational Dermatology. 11: 1–5. doi:10.2147/CCID.S130116. PMC 5739544. PMID 29296091.
- ^ Ozdöl S, Sahin S, Tokgözoğlu L (August 2008). "Xanthelasma palpebrarum and its relation to atherosclerotic risk factors and lipoprotein (a)". International Journal of Dermatology. 47 (8): 785–9. doi:10.1111/j.1365-4632.2008.03690.x. PMID 18717856. S2CID 25746456.
- ^ Chang, Hua-Ching; Sung, Chih-Wei; Lin, Ming-Hsiu (March 2020). "Serum lipids and risk of atherosclerosis in xanthelasma palpebrarum: A systematic review and meta-analysis". Journal of the American Academy of Dermatology. 82 (3): 596–605. doi:10.1016/j.jaad.2019.08.082. PMID 31499151. S2CID 202413378.
- ^ Shields C, Shields J (2008). Eyelid, conjunctival and orbital tumors: atlas and textbook. Hagerstwon, MD: Lippincott Williams & Wilkins. ISBN 978-0-7817-7578-6.[page needed]
- ^ "Xanthelasma". Mosby's Medical Dictionary (8th ed.). 2009. Retrieved November 8, 2012.
- ^ Jain A, Goyal P, Nigam PK, Gurbaksh H, Sharma RC (September 2007). "Xanthelasma Palpebrarum-clinical and biochemical profile in a tertiary care hospital of Delhi". Indian Journal of Clinical Biochemistry. 22 (2): 151–3. doi:10.1007/BF02913335. PMC 3453794. PMID 23105704.
External links
[edit]Xanthelasma
View on Grokipediafrom Grokipedia
Xanthelasma palpebrarum is a benign dermatological condition characterized by soft, yellowish, cholesterol-rich plaques or papules that typically appear on the eyelids, most commonly near the inner canthi of the upper and lower lids.[1] These lesions represent the most frequent form of cutaneous xanthoma and result from lipid accumulation in foam cells derived from macrophages within the dermis.[2] Although often asymptomatic and painless, xanthelasma can cause cosmetic concerns and may signal underlying lipid disorders in approximately 50% of cases.[1]
The etiology of xanthelasma is multifactorial, frequently linked to primary hyperlipidemias such as familial type IIa or IIb, or secondary causes including diabetes mellitus, hypothyroidism, and other metabolic disturbances that elevate serum cholesterol levels.[1] Pathophysiologically, repeated mechanical stress from eyelid blinking compresses capillaries, promoting perivascular lipid leakage and infiltration by foam cells, which form the characteristic deposits.[2] Notably, about half of affected individuals have normal lipid profiles, suggesting additional local factors like inflammation or genetic predispositions may contribute.[1] Epidemiologically, xanthelasma affects women more commonly than men (prevalence of 1.1% versus 0.3%), with peak incidence between ages 35 and 55, though it can occur from adolescence to older adulthood.[1] Its presence is also associated with increased cardiovascular risk, including higher rates of myocardial infarction and ischemic heart disease, independent of lipid levels in some studies, though recent 2025 research shows mixed results.[2]
Clinically, lesions present as symmetrical, well-defined, flat or slightly elevated plaques that are soft or semisolid, ranging from 1-2 mm to larger coalescing areas, without pruritus or tenderness.[1] Diagnosis is primarily clinical, but evaluation includes serum lipid profiling, fasting glucose, thyroid function tests, and liver panels to identify underlying causes; histopathology, if needed, confirms foam cell aggregates with Touton giant cells.[2] Differential diagnoses encompass conditions like syringomas, sebaceous hyperplasia, or amyloidosis, though biopsy is rarely required for typical presentations.[1]
Management focuses on addressing any hyperlipidemia through lifestyle modifications, statins, or other lipid-lowering agents to reduce recurrence and cardiovascular risks, while cosmetic removal options include surgical excision, ablative laser therapy (e.g., CO2 or erbium:YAG), or chemical peels with trichloroacetic acid.[1] Recurrence rates vary from 26% within one year to up to 50% overall, particularly with deeper lesions or untreated dyslipidemia, but the condition itself is non-malignant with an excellent prognosis.[2]
Definition and Clinical Features
Definition
Xanthelasma palpebrarum is a benign dermatologic condition characterized by sharply demarcated, yellowish deposits of cholesterol and lipids underneath the skin, primarily on the eyelids.[3][1] It is classified as a type of xanthoma, specifically a plane xanthoma, which involves the accumulation of foam cells—lipid-laden macrophages—in the dermis.[4][5] Unlike other forms of xanthoma, such as tendon xanthomas, xanthelasma is distinguished by its exclusive location on the periorbital skin and absence of tendon involvement.[4][6]Appearance and Symptoms
Xanthelasma manifests as soft, semisolid, yellowish plaques or papules on the eyelids, characterized by a distinct yellow-white coloration due to underlying cholesterol deposits.[1] These lesions typically measure 2 to 30 mm in diameter, presenting a flat to slightly raised, soft to firm texture upon palpation.[4][1] They are often bilateral and symmetrical, with multiple lesions more common than solitary ones, enhancing their recognizable pattern around the eyes.[1] The lesions predominantly appear on the medial aspects of the upper and lower eyelids, near the inner canthus, though they may extend to the nasal or temporal regions in advanced cases.[7] Progression is gradual, beginning as small spots that evolve into larger patches over months to years, remaining stable or slowly enlarging without spontaneous regression.[8] This slow expansion can lead to coalescence of individual plaques, forming more extensive areas of involvement.[8] Patients primarily experience xanthelasma as a cosmetic concern, with the lesions being painless and asymptomatic in most instances.[1] Rare cases may involve mild itching, tenderness, or irritation, particularly if secondary inflammation occurs, but these do not typically impair eyelid function or vision.[8][9]Etiology and Pathophysiology
Etiology
Xanthelasma palpebrarum is primarily associated with disorders of lipid metabolism, particularly hyperlipidemias, which account for approximately 50% of cases. The most common primary hyperlipidemias linked to its development include type IIa (familial hypercholesterolemia), characterized by elevated low-density lipoprotein (LDL) cholesterol due to genetic defects in LDL receptor function, and type IIb (familial combined hyperlipidemia), characterized by elevations in both low-density lipoprotein (LDL) cholesterol and triglycerides due to multiple genetic and environmental factors.[1][10] Type IV hyperlipidemia, with elevated triglycerides, and low high-density lipoprotein (HDL) levels are also frequently implicated, contributing to increased circulating atherogenic lipids that promote eyelid deposition.[2][11] Secondary causes arise from conditions that disrupt systemic lipid homeostasis, leading to hyperlipidemia in about half of affected individuals. These include hypothyroidism, which reduces LDL clearance through impaired receptor activity; diabetes mellitus, associated with insulin resistance and elevated very low-density lipoprotein (VLDL); obesity, promoting dyslipidemia via adipose tissue inflammation; primary biliary cholangitis (PBC), causing hypercholesterolemia from elevated lipoprotein X; and nephrotic syndrome, resulting in proteinuria-induced hypoalbuminemia and compensatory LDL overproduction.[1][10][2] Such systemic factors elevate plasma lipids, facilitating their extravasation into periorbital tissues.[11] In the remaining 50% of cases, xanthelasma occurs in normolipemic individuals with normal serum lipid profiles, suggesting localized or genetic mechanisms independent of overt hyperlipidemia. Possible contributors include dermal lipid leakage from repeated capillary compression during eyelid movement, leading to foam cell accumulation, or genetic predispositions such as variants in the APOE gene that subtly alter lipoprotein metabolism and clearance.[1][10] No evidence supports infectious agents or traumatic injury as etiologic factors in xanthelasma development.[11]Pathophysiology
Xanthelasma arises from the accumulation of foam cells—macrophages engorged with cholesterol esters—in the superficial dermis, resulting from leakage of plasma lipoproteins through the vascular endothelium. This leakage is facilitated by repeated compression of capillaries in the eyelid skin during blinking cycles, mediated by the orbicularis oculi muscle, which weakens the endothelial barrier and allows lipid-rich plasma to extravasate into the perivascular tissue.[1] In many cases, this process is triggered by hyperlipidemia, though the detailed precipitating conditions are addressed elsewhere. Once in the dermis, lipids are phagocytosed by macrophages via scavenger receptors, but impaired lipid clearance prevents efficient efflux from macrophages, leading to intracellular overload and foam cell formation. Over time, overloaded macrophages rupture, releasing lipids extracellularly, which promotes further deposition and the development of planar, yellowish plaques; multilamellar bodies within these cells contribute to lipid storage and exacerbate the accumulation.[12][6] Histologically, xanthelasma presents as avascular, paucicellular plaques composed primarily of foamy histiocytes clustered around blood vessels in the superficial reticular dermis, with Touton giant cells, cholesterol clefts, and needle-shaped crystals visible under microscopy. There is no involvement of the epidermis, papillary dermis, or subcutaneous fatty layer, and a mild perivascular inflammatory infiltrate may be present without significant epidermal changes.[6][1]Epidemiology
Prevalence
Xanthelasma palpebrarum, the most common form of cutaneous xanthoma, has an estimated prevalence of approximately 1.1% in women and 0.3% in men within the general adult population, corresponding to an overall prevalence ranging from 0.56% to 1.5% in Western countries.[1][13] This condition manifests more frequently in individuals with underlying hyperlipidemia, where the prevalence can reach up to 45% in cases of familial hypercholesterolemia, significantly higher than in the normolipidemic population.[14][10] The incidence of xanthelasma increases with age, peaking between 30 and 50 years, though it typically occurs within the broader range of 20 to 70 years in adults.[10][2] It remains rare in children and adolescents, except in those with familial hypercholesterolemia, where early-onset lipid disorders may precipitate its appearance.[1] Globally, xanthelasma exhibits no substantial geographic variation in prevalence, with reported rates in India ranging from 0.3% to 1.5%, comparable to those in Western populations.[2][13]Demographic Patterns
Xanthelasma palpebrarum demonstrates a higher prevalence among women, with a female-to-male ratio of approximately 2:1, potentially attributed to hormonal influences such as estrogen on lipid metabolism.[15] Studies consistently report a predominance of female cases, ranging from 64.7% to 68.2% in clinical cohorts.[16][17] The condition predominantly affects middle-aged adults, with peak incidence occurring between 40 and 50 years of age, though cases can arise from the third to seventh decades.[2] This age distribution aligns with broader patterns of lipid metabolism changes in adulthood.[1] Ethnic patterns indicate increased rates among Asians and individuals of Caucasian (particularly Mediterranean) descent.[18] For instance, incidence in Indian populations (South Asian) ranges from 0.3% to 1.5%.[2] Familial clustering is evident, often linked to inherited dyslipidemias, with particularly strong genetic associations in normolipemic familial forms that occur without overt hyperlipidemia.[1] These genetic factors highlight the role of hereditary lipid disorders in subgroup susceptibility.[19]Diagnosis
Clinical Evaluation
The clinical evaluation of xanthelasma palpebrarum begins with a detailed history-taking to understand the patient's concerns and potential underlying factors. Patients typically present due to the cosmetic impact of the lesions, which can cause self-consciousness or social discomfort given their prominent location on the eyelids. Inquiry into family history is essential, as xanthelasma may be associated with hereditary lipid disorders such as familial hypercholesterolemia. The lesions are usually asymptomatic, with no systemic symptoms reported, though gradual progression over time is common; mild pruritus is rare and not a typical feature.[1][20] Physical examination focuses on inspection and palpation to confirm the characteristic features. On inspection, xanthelasma appears as bilateral, well-demarcated, soft yellow plaques or papules, most commonly on the medial aspects of the upper eyelids, though they may involve the lower lids or extend circumferentially. These lesions are typically symmetrical and lack induration, ulceration, or tenderness. Palpation reveals a soft, mobile texture without expressible lipid material, distinguishing them from more rigid or inflammatory processes.[1][20] Differential diagnoses include syringoma, sebaceous hyperplasia, amyloidosis, and rarely basal cell carcinoma; biopsy may be considered if features are atypical.[1] Dermoscopy may be employed as a non-invasive adjunct to visualize lipid deposits, revealing a yellowish structureless background with a network of brown streaks, aiding in confirmation and differentiation from other lesions.[21] Biopsy is rarely required for diagnosis due to the pathognomonic clinical presentation but, if performed in atypical cases, demonstrates collections of foam cells (lipid-laden histiocytes) in the superficial dermis, often with minimal inflammation.[1]Laboratory Investigations
Laboratory investigations for xanthelasma primarily aim to identify potential underlying hyperlipidemias and secondary causes; however, recent evidence suggests that the prevalence of dyslipidemia in affected patients is similar to the general population (approximately 42-46%).[22] A comprehensive lipid panel is recommended for all patients, typically performed after a 12-hour fast to accurately assess levels of total cholesterol, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein (HDL) cholesterol, and triglycerides.[1][4] Lipoprotein electrophoresis may also be included to characterize specific hyperlipidemia types, such as type II or IV patterns, which have been associated with xanthelasma in some cases.[4] These tests help detect dyslipidemias that may contribute to lipid deposition in the eyelids, guiding systemic management even if the lesions themselves require no intervention.[10] Screening for secondary etiologies is essential, particularly in patients without primary hyperlipidemia. Thyroid function tests, including thyroid-stimulating hormone (TSH), are performed to evaluate for hypothyroidism, which can disrupt lipid metabolism and promote xanthelasma formation.[10][23] For diabetes screening, fasting blood glucose and hemoglobin A1c (HbA1c) levels are measured, as uncontrolled hyperglycemia is a recognized risk factor linked to altered lipid handling.[1][4] Liver function tests, encompassing enzymes such as alanine aminotransferase (ALT) and aspartate aminotransferase (AST), along with bilirubin levels, are conducted to rule out biliary obstruction or hepatic disorders that may secondarily elevate lipids.[10][1] In atypical presentations where clinical diagnosis is uncertain, a skin biopsy may be warranted, though it is rarely needed given the characteristic appearance of xanthelasma. The biopsy specimen, often obtained via shave technique, reveals lipid-laden foamy histiocytes in the superficial dermis, and oil-red-O staining can confirm the presence of neutral lipids like cholesterol esters.[1] No routine imaging studies, such as ultrasound or MRI, are required for diagnostic confirmation, as they do not alter management in standard cases.[24]Management
Indications for Treatment
Treatment for xanthelasma is primarily indicated when the lesions cause cosmetic disfigurement, particularly in visible periocular areas, leading to psychological distress or diminished quality of life for the patient.[25] These yellowish plaques, often appearing on the eyelids, can affect self-esteem and social interactions due to their prominent location, prompting many individuals to seek intervention despite the benign nature of the condition.[23] Medical indications for treatment arise in cases of underlying treatable hyperlipidemia, where addressing the lipid disorder may help prevent lesion progression and reduce associated cardiovascular risks, as xanthelasma is linked to dyslipidemia in approximately 50% of adult patients.[1] Additionally, intervention may be warranted if lesions exhibit progressive enlargement that threatens eyelid function or impairs vision, though such severe cases are uncommon.[26] For asymptomatic, stable lesions without significant cosmetic or functional impact, treatment is not required, as xanthelasma poses no direct health threat.[1] In these instances, patient education emphasizes monitoring for changes in lesion size or appearance, alongside screening for underlying lipid disorders as outlined in laboratory investigations, to guide ongoing management.[23]Treatment Options
Treatment options for xanthelasma palpebrarum primarily aim to remove or reduce the visible lesions through localized interventions, as systemic therapies address underlying lipid abnormalities rather than the plaques directly.[27] These modalities include chemical peels, ablative procedures, and surgical techniques, selected based on lesion size, depth, and location.[28] Topical chemical peels, particularly trichloroacetic acid (TCA) at concentrations of 50-100%, are a non-invasive option for focal application to dissolve lipids and coagulate proteins in the plaques.[27] The acid is applied with circular motion using a toothpick or cotton swab and neutralized with sodium bicarbonate, often requiring multiple sessions—typically 1 to 6—spaced 2-4 weeks apart for gradual, layered removal of superficial lesions.[28] Higher concentrations like 70-100% yield better clearance rates, with over 75% improvement in approximately 83% of cases across studies involving 137 patients.[27] Ablative therapies provide precise vaporization of the plaques and are suitable for superficial to moderately deep lesions. Carbon dioxide (CO2) laser ablation, using continuous or pulsed modes under local anesthesia, achieves excellent cosmetic outcomes with greater than 75% improvement in over 90% of patients, often in 1-4 sessions.[27] Erbium:YAG laser similarly offers effective tissue ablation with minimal thermal damage, resulting in over 75% improvement in about 80% of cases, also typically requiring 1-4 treatments.[27] Radiofrequency ablation delivers thermal energy for controlled vaporization, demonstrating good-to-excellent clearance in 98.8% of 80 reported cases, with sessions spaced similarly to laser therapies.[27] Surgical excision remains a definitive approach for larger or deeper lesions extending into the dermis or muscle. Shave biopsy involves superficial tangential removal under local anesthesia, while more extensive procedures like blepharoplasty incorporate full-thickness excision with possible skin grafts or flaps for reconstruction, minimizing cosmetic defects.[27] These methods carry a risk of scarring, particularly with contracture in advanced cases, though outcomes are excellent for sizable plaques when combined with reconstructive techniques.[29] Systemic lipid-lowering drugs, such as statins, are indicated for managing associated hyperlipidemia but do not directly reduce xanthelasma lesions, as their primary effect targets circulating cholesterol levels rather than established foam cell deposits.[28]Prognosis
Short-term Outcomes
Non-surgical treatments for xanthelasma, such as trichloroacetic acid (TCA) peels and laser ablation, demonstrate high success rates of 80-94% in achieving greater than 75% lesion clearance and cosmetic improvement, often with minimal downtime allowing return to normal activities within days.[27] These modalities typically require 1-4 sessions, with fractional CO2 laser showing 94% efficacy and erbium:YAG laser around 80%, while TCA at 70-100% concentrations yields 83-97% improvement in clinician-assessed outcomes.[27][30] Common short-term side effects for these non-surgical options include transient erythema and edema, which generally resolve within 1-2 weeks, along with hypopigmentation in up to 11% of cases and occasional milia formation that clears spontaneously over weeks.[27] For TCA specifically, reported incidences include erythema in 2.6% and hypopigmentation in 3.9%, with no serious adverse events in the study.[30] Surgical excision, while effective for larger lesions, carries a risk of temporary ectropion due to scar contracture in approximately 4.2% of cases, though major complications remain rare at under 0.5%.[31][32] Patient satisfaction is typically high across treatments, with 94% reporting positive results following TCA due to visible reduction in lesions and favorable cosmetic outcomes.[30] Follow-up evaluations at 1-3 months post-treatment are standard to monitor healing, confirm clearance, and address any residual effects.[27]Long-term Implications
Xanthelasma palpebrarum exhibits significant recurrence following treatment, with rates typically ranging from 40% after primary excision to 60% after secondary procedures and up to 80% in cases involving all four eyelids or after multiple recurrences.[31] These recurrences often occur within 5 years, and rates may be higher in patients with untreated hyperlipidemia due to ongoing lipid abnormalities.[1] Effective long-term control necessitates ongoing management of underlying lipid abnormalities through dietary modifications, exercise, and pharmacological interventions such as statins to reduce the likelihood of lesion reappearance.[25] The presence of xanthelasma serves as a marker for elevated cardiovascular risk, particularly when associated with hyperlipidemia, indicating accelerated atherosclerosis. Multifactorially adjusted hazard ratios show an increased risk of myocardial infarction (HR 1.48, 95% CI 1.23-1.79) and ischemic heart disease (HR 1.39, 95% CI 1.20-1.60) in affected individuals compared to those without.[33] Similarly, the odds ratio for severe atherosclerosis is 1.69 (95% CI 1.03-2.79).[33] These associations underscore the importance of xanthelasma as an early indicator of subclinical vascular disease, prompting evaluation for broader atherosclerotic complications. Patients with xanthelasma require lifelong monitoring of lipid profiles, especially if initial screening reveals dyslipidemia, with guidelines recommending annual or biennial assessments alongside sustained lifestyle modifications to mitigate cardiovascular progression.[1] Malignant transformation is exceedingly rare, as the condition remains fundamentally benign without inherent oncogenic potential.[34] Brief reference to initial treatment success highlights that while short-term clearance is achievable in most cases, sustained vigilance is essential to address these enduring implications.[25]History and Etymology
Etymology
The term xanthelasma originates from Ancient Greek, combining xanthos (ξανθός), meaning "yellow," with elasma (ἔλασμα), referring to a "beaten plate" or "flat foil," which aptly describes the characteristic yellowish hue and plaque-like morphology of the skin lesions.[1][35] The full medical designation, xanthelasma palpebrarum, incorporates the Latin genitive palpebrarum, meaning "of the eyelids," to specify the predominant periorbital location of these deposits.[36][37] This nomenclature was introduced in the mid-19th century by British surgeon and dermatologist Erasmus Wilson, who used it to differentiate the eyelid-specific variant from other xanthomatous conditions based on its distinct clinical presentation.[38][39] The term entered English medical literature around 1867, marking its adoption to highlight the lesions' superficial, non-tender, and cosmetically prominent nature.[38]Historical Background
The first description of xanthelasma appeared in 1835 when French physician Pierre François Olive Rayer documented cases of yellowish eyelid tumors in his seminal work Traité théorique et pratique des maladies de la peau, referring to them as "cholestéatome des paupières" based on their appearance resembling cholesterol deposits.[40] Rayer's observations, illustrated in an accompanying atlas, marked the initial clinical recognition of these benign lesions, though their etiology remained unclear at the time. In 1867, British dermatologist Erasmus Wilson coined the term "xanthelasma" in his treatise On Diseases of the Skin, deriving it from Greek roots to denote the yellow, plate-like plaques and emphasizing their lipid composition through rudimentary microscopic examination of excised tissue.[41] Wilson's nomenclature and insights shifted focus toward a potential metabolic basis, distinguishing xanthelasma from other skin tumors and establishing it as a distinct entity in dermatological literature.[39] The understanding of xanthelasma advanced significantly in the 20th century, particularly through investigations linking it to hypercholesterolemia. Key studies in the 1960s, including a large cohort analysis at the Mayo Clinic involving 896 patients from 1950 to 1961, demonstrated a strong association with elevated serum cholesterol levels in approximately 50% of cases, confirmed via lipid profiling and histopathological biopsies revealing foam cell accumulations rich in cholesterol esters.[42][1] These findings, building on earlier histological work, underscored xanthelasma as a cutaneous marker of underlying dyslipidemia, prompting routine lipid screening in affected individuals.References
- https://en.wiktionary.org/wiki/xanthelasma