Venous Eczema and Lipodermatosclerosis
Transcription
Venous Eczema and Lipodermatosclerosis
Venous Eczema and Lipodermatosclerosis Laurel M. Morton, MD, and Tania J. Phillips, MD, FRCPC Cutaneous changes are a common feature of chronic venous insufficiency and include venous eczema and lipodermatosclerosis. This review will address the presumed pathophysiology of these conditions, their clinical findings, and important management strategies. Semin Cutan Med Surg 32:169-176 © 2013 Frontline Medical Communications KEYWORDS venous eczema, lipodermatosclerosis, chronic venous insufficiency C hronic venous disease is commonly encountered in both the United States and Europe.1,2 The most common disorders within this spectrum of disease include lower extremity edema, varicosities, and venous leg ulcers. The cutaneous manifestations of venous insufficiency are very common and often require dermatologic expertise. This article will address venous eczema and lipodermatosclerosis (LDS), which can sometimes produce diagnostic dilemmas and treatment challenges. Venous eczema (otherwise known as gravitational eczema, varicose eczema and stasis dermatitis) affects the lower legs and ankles. The skin becomes erythematous, scaly and pruritic. There are also often associated signs of venous disease, such as varicose veins, edema, hemosiderin pigmentation, atrophie blanche, and LDS. LDS is a progressive fibrotic process of the dermis and subcutaneous fat associated with chronic venous insufficiency (CVI), resulting in hyperpigmentation and induration of the lower leg. The presence of these cutaneous conditions is important for the classification of venous disease (Table 1). Unfortunately, there is scarce epidemiologic data regarding the prevalence of venous eczema and LDS. In fact, little data exists for chronic venous disease in general, likely because it is rarely life-threatening and has multiple definitions. However, up to 17% of men and 40% of women suffer from CVI;1 and of the 23% of Americans with varicose veins, 2 million will develop skin changes.4 The pathophysiology of cutaneous changes seen in venous disease remains unclear. It involves chronic ambulatory venous hypertension and resulting microangiopathic and inflammatory changes, which lead to classic clinical and histoDepartment of Dermatology, Boston University, Massachusetts. Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported. Correspondence: Laurel M. Morton, MD, Department of Dermatology, Boston University 1 Devonshire Place #3804, Boston, MA 02109. E-mail: Laurel.m.morton@gmail.com 1085-5629/13/$-see front matter © 2013 Frontline Medical Communications DOI: 10.12788/j.sder.0026 pathologic findings. The management of venous eczema and LDS requires treatment of underlying venous insufficiency with consideration of other medical and surgical interventions, if appropriate. Pathophysiology The normal venous system consists of a high pressure deep venous system and a superficial system, linked by communicating veins. One-way valves prevent retrograde blood flow. During walking, the calf muscle pump contracts, raising the deep venous pressure, emptying the deep veins, and propelling blood towards the heart. Once the deep veins empty, the deep venous pressure falls, the valves open, and blood flows from the superficial to the deep system. CVI arises from failure of the calf muscle pump or abnormalities in the venous system, such as valve dysfunction, venous outflow obstruction or a combination of these factors. In these circumstances, venous pressure fails to decrease significantly during exercise, creating ambulatory venous hypertension.5 How these mechanical changes result in the skin signs and symptoms of venous disease is not well understood. Microangiopathic and proinflammatory effects resulting from venous hypertension are thought to play a role. The microcirculatory changes resulting from CVI encompass decreased capillary counts, increased capillary diameter, permeability to proteins and erythrocytes, and increased subcutaneous fluid flow.6 Increased permeability of small vessels leads to pericapillary fibrin cuff formation7 postulated to result in decreased oxygenation of involved skin.8,9 However, fibrin deposition is not confluent, which may mitigate against decreased oxygen diffusion. Fibrin may also impair tissue healing by inhibiting new collagen formation, contributing to the fibrosis seen in LDS. Inflammatory cells may be even more important in the development of venous eczema and LDS. The ‘white blood cell trapping theory proposes that due to decreased flow, 169 L.M. Morton and T.J. Phillips 170 Table 1 Classification System for Chronic Venous Disease (CEAP)3 Grade Description C: Clinical Manifestations No visible or palpable signs of venous C0 disease C1 Telangiectasias or reticular veins C2 Varicose veins; distinguished from reticular veins by a diameter of 3 mm or greater C3 Edema C4 Changes in skin and subcutaneous tissue secondary to chronic venous disease: 4a (pigmentation or eczema), 4b (LDS or atrophie blanche) C5 Healed venous ulcer C6 Active venous ulcer E: Etiologic Factors EC Congenital EP Primary ES Secondary (post-thrombotic) EN No venous cause identified A: Anatomic Distribution of Disease AS Superficial veins AP Perforator veins AD Deep veins AN No venous location identified P: Pathophysiologic Findings PR Reflux PO Obstruction PR,O Reflux and obstruction PN No venous pathophysiology identifiable Abbreviation: LDS, lipodermatosclerosis. white blood cells accumulate and release toxic oxygen metabolites and proteolytic enzymes resulting in capillary damage, increased permeability, and fibrin cuff formation.10 A 28.6% decrease in circulating white blood cells was shown in patients with CVI.11 Histologic specimens of LDS reveal increased white blood cells in tissue.12 T lymphocytes and macrophages increase in patients with varicose veins. Patients with severe LDS also show elevated interleukin-1␣ and interleukin-1, important proinflammatory cytokines.13 Neutrophils, mast cells and interleukin-8 are also important mediators of inflammation in CVI.14,15 Neutrophils exit the circulation and transverse the endothelium to enter the dermis. The cell-adhesion molecule L-selectin aids neutrophils in this process by adhering to endothelial cells to promote rolling along blood vessel walls. After leukocyte activation, L-selectin is shed and CD11b begins to allow similar adhesion and eventual extravascular migration.16 In chronic venous disease, plasma L-selectin increases and L-selectin decreases on the surface of circulating neutrophils. Venous hypertension possibly leads to this neutrophil activation and migration into tissue with subsequent decreased presence in circulation.16 Others have demonstrated increased adhesion molecules ICAM-1 and VCAM-1 in inflamed liposclerotic skin.17 Finally, it is clear that the architecture of skin must change to account for the firm induration of LDS. Expression of mRNA for matrix metalloproteinase (MMP) – 1 and 2 is increased in LDS as is active MMP2. This unrestrained activity likely leads to extracellular matrix turnover18 and eventually venous ulceration.18,19 Tissue hypoxia and white cell activation may also stimulate transforming growth factor (TGF)-1 production and accelerate fibrosis.19 Clinical Findings and Disease Course Early clinical findings of CVI include lower extremity edema, a condition that frequently presents at the ankles, worsens towards the end of the day, and improves overnight. Although not always present, varicosities range from thin telangiectasias to submalleolar venous flares to larger tortuous vessels.20,21 Over months to years, as venous hypertension continues, distal red-brown hyperpigmentation due to extravasated erythrocytes, hemosiderin-laden macrophages, and melanin deposition occurs.22 These changes tend to be localized to the gaiter area. At this stage of the disease, xerosis and pruritus may appear and can develop into venous eczema. This very pruritic condition begins at the ankle, particularly over the medial malleolus.23,24 It is often, but not always, bilateral. It may begin as sharply demarcated erythematous papules and vesicles; however, it eventually becomes diffuse, poorly defined, and may demonstrate serous exudate and crust.23-25 It is less frequently warm to the touch compared to cellulitis.25 In venous eczema, secondary infection can occur and should be suspected when the skin barrier has broken down and other signs of impetiginization exist. Contact dermatitis is common in these patients. Inciting agents include topical antibiotics such as neomycin and bacitracin, lanolin products,26 fragrances, parabens,27 corticosteroids,28 rubber components,29 and epoxy resin.30 A thorough history should be procured and patch testing considered in patients with recalcitrant lower extremity dermatitis. Disseminated eczema (id reaction) has also been reported in the context of contact dermatitis seen in patients with chronic venous disease.23,31,32 There is a clinical continuum of LDS ranging from acute to chronic disease.33 Acute LDS presents as painful, erythematous and purple, indurated plaques confined to the lower extremity. White scale may be present and lesions are usually well-demarcated from normal skin.7,19 LDS is often warm, tender, and clinically misdiagnosed as acute cellulitis, erythema nodosum, or inflammatory morphea. Two thirds of patients with LDS demonstrate abnormal venous reflux and/or ejection.34 In its more chronic form, LDS is associated with a classic ‘inverted champagne bottle’ appearance of the distal third of the lower leg. Skin changes are characterized by hyperpigmentation and fibrosis of dermal and subcutaneous tissue,19,33 which is bilateral in approximately half of the cases (Figure 1).35 This morphology was first described as hypodermatitis sclerodermiformis by Huriez in 1955.36 Over time, Venous eczema and lipodermatosclerosis 171 theories regarding its etiology have varied. Huriez and colleagues suspected cellulitis in the setting of venous insufficiency.36 Many years later, acid-fast microorganisms were thought to be an inciting factor.37 Today, most authors agree that LDS is either exclusive to, or highly associated with, venous insufficiency.20 The lower extremities are most often involved though it has been documented in other dependent locations. One interesting report describes a 54-year-old female with congestive heart failure demonstrating clinical and histologic findings supportive for LDS in a pendulous abdomen.38 Risks factors for the development of LDS include female gender, elevated body mass index, and deep venous incompetence. One retrospective study of 97 LDS patients showed that 87% were women and 67% had deep venous incompetence while the mean body mass index was 34.3.35 Pathology In CVI, the dermis may demonstrate lobulated, thick-walled small blood vessels in the papillary and reticular dermis, extravasated erythrocytes, hemosiderin-laden macrophages, lymphohistiocytic infiltrates, and fibrosis (Figure 2).39,40 Venous eczema also demonstrates parakeratosis, epithelial hyperkeratosis, and dermal edema, which can be pronounced in the papillary dermis. Fibrosis is variable and a mononuclear cell inflammatory infiltrate is somewhat inconspicuous.41 These changes may be mild in acute LDS and more prominent in chronic disease.39,40 In LDS, the pathology lies in the subcutaneous tissue and broadly includes fat necrosis, a lymphohistiocytic infiltrate, and septal fibrosis.40 Acute lesions demonstrate focally ex- Figure 1 An example of bilateral chronic lipodermatosclerosis demonstrating hyperpigmented and indurated plaques at the lower, medial legs. Figure 2 Histopathologic changes of chronic venous insufficiency at low power showing lobules of small blood vessels, hemorrhage and hemosiderin. travasated erythrocytes, ischemic necrosis in fat lobules with hyalinized fat, a sparse inflammatory infiltrate, and mild septal fibrosis. Lipomembranous fat necrosis and microcysts may only be seen in limited areas.40 As lesions progress, inflammation is more prominent as is septal fibrosis and obliteration of fat lobules. Cyst-like cavities occur within the adipose tissue and pseudocysts more often possess the classic lipomembranous scalloped, feathered lining. Foamy macrophages and lipogranulomas may also occur.40 Moth-eatenappearing elastic fibers, resembling those in pseudoxanthoma elasticum, may be present and help differentiate LDS from other fibrosing entities (Figure 3).39 Figure 3 Lipodermatosclerosis histopathology at low power showing deep-seated fibrosis and fat degeneration with microand macrocysts. L.M. Morton and T.J. Phillips 172 Differential Diagnosis and Diagnostic Measures It is important to differentiate venous eczema and LDS from other dermatologic conditions of the lower extremities. For the experienced clinician, these entities are most frequently diagnosed by physical examination.33,42 The differential diagnosis for venous eczema includes other papulosquamous conditions such as nummular eczema and psoriasis. These conditions usually affect additional body sites with nail changes or joint complaints in the case of psoriasis. Xerosis and eczema craquele can resemble venous eczema but are frequently more diffuse and generally improve with emollients and topical steroids alone. Venous eczema is commonly misdiagnosed as cellulitis.43,44 Both entities can present with pitting edema, erythema, serous drainage, and even desquamation. However, cellulitis is usually unilateral, tender, and may be associated with systemic symptoms such as a fever. Venous eczema is commonly bilateral and tends to be itchy, nontender, and more chronic.44 Perhaps the most challenging condition to rule out is allergic contact dermatitis since this may be seen in conjunction with venous eczema, which is characterized by a decreased skin barrier that may increase the rate of sensitization.45 In cases where allergy is suspected, patch testing is a valuable diagnostic tool.46 Irritant contact dermatitis should also be considered and the patient closely questioned about topical applications to the skin. Acute LDS is also frequently misdiagnosed as cellulitis as it presents with a very tender, well-circumscribed red plaque; however it does not improve with antibiotics. LDS may be confused with other panniculitidies such as erythema nodosum (usually presenting with multiple red tender nodules on the shins), thrombophlebitis (presenting as redness and tenderness along the course of the vein, usually accompanied by swelling), and fibrosing conditions such as inflammatory morphea (presenting with indurated round or oval plaques which may be red to purple on initial presentation).19,47 LDS can be seen as a secondary diagnosis in patients with connective tissue disease; it should be considered prior to the use of immunosuppressants in these patients with lower extremity fibrosis.48 A rare but interesting case of sarcoidosis masquerading as LDS was reported where ulcerated plaques, morpheaform lesions, and lower extremity edema closely mimicked findings of CVI.49 Biopsy should be avoided in patients with LDS since up to 50% of biopsy sites fail to heal33 and may become chronic ulcers. Furthermore, the histologic changes are not specific to this entity.50 Duplex ultrasound should be performed to confirm the suspected diagnosis of venous insufficiency51,52 and can specifically identify incompetent veins.53 Ultrasound indentometry may be a useful way to quantify fibrosis in LDS54 and the durometer can be used to assess skin hardness. It has been reported that magnetic resonance imaging can be used in the diagnosis of LDS, showing characteristic though not pathognomonic fibrosclerotic septa and a honeycomb pattern in the subcutaneous tissue.42 Treatment Options Management of venous eczema and LDS must address underlying venous insufficiency, primarily by compression therapy. Venous eczema may also be treated with topical interventions typically used for eczematous skin disease. There are several useful adjunctive measures for LDS in Table 2. Compression Therapy Compression is a mainstay of treatment for CVI. A 2012 Cochrane Database review, including 48 randomized controlled trials, verified that compression increases venous ulcer healing rates compared to no compression. Furthermore, multi-component compression containing an elastic bandage is more effective than compression without an elastic component.55 Given that venous eczema and LDS also improve with compression, this should be the first-line treatment recommendation for patients. In one study of 150 patients, graduated compression alone effectively reduced the skin changes seen in LDS.56 In particular, below-the-knee, opentoe, graded compression is ideal.33 Pressure at 20-30 mm Hg may be sufficient for less severe cases; however, patients with any history of ulcer disease should employ 30-40 mm Hg.4 It is important to note that up to two thirds of patients may be nonadherent in the use of compression stockings for reasons including a binding sensation, presumed ineffectiveness, the sensation that they are too hot to wear, limb soreness, poor cosmesis, contact dermatitis, pruritus, and cost.57 Prior to attempting more aggressive interventions, clinicians should attempt to elicit an honest report from patients regarding their compliance with compression. While not ideal,58 even 10-15 mm Hg pressure may improve symptoms of venous insufficiency.59 In one small study of 11 patients, ultrasound revealed that compression from 18-26 mm Hg is sufficient to decrease dermal edema in LDS patients.58 Compression wraps rather than stockings should be utilized in patients with open venous leg ulcers.19 Other simple interventions focus on lifestyle changes such as weight loss, increased leg elevation, and increased exercise to improve calf muscle pump function.4,52 Topical Interventions for Dermatitis In addition to treating underlying venous insufficiency with compression, venous eczema is managed topically with emollients and immunomodulators, including corticosteroids60 and calcineurin-inhibitors. There is scant data to support this approach. In one study of 19 patients with ‘stasis dermatitis’, betamethasone valerate 0.12% foam led to improvement in erythema compared to vehicle alone.61 Dissemond et al also reported one case of dermatitis treated twice daily for 5 days with topical 0.1% tacrolimus that resulted in complete healing.60 For severe venous eczema, a short course of oral corticosteroids can be helpful. In 2012, Maroo et al suggested treating venous eczema with a combination of oral doxycycline and topical tacrolimus. The authors cite the anticollagenase, anti-inflammatory and immunomodulatory effects of doxycycline and the T-cell Venous eczema and lipodermatosclerosis 173 Table 2 Treatment Recommendations for Lipodermatosclerosis Treatment Recommended Dosing Adverse Effects Monitoring 30-40 mm Hg graduated compression (20-30 mm Hg may be effective in patients without history of venous leg ulcer) Stanozolol 2-5 mg by mouth twice daily Danazol 100-200 mg by mouth twice daily Oxandralone 100 mg by mouth twice daily Limb soreness Contact dermatitis Pruritus Prior to initiation, rule out arterial disease by palpating for pulses; ABI Edema and hypertension Abnormal liver function tests Lipid abnormalities Virilization Dysmenorrhea Exacerbation of prostatic hypertrophy Peliosis hepatitis Hepatocellular carcinoma Blood pressure, liver function tests, lipid panel, prostatespecific antigen, complete blood count and renal function tests at baseline Blood pressure monitoring weekly for up to one month and then every 3-4 weeks Liver function tests every 3-4 weeks Uncontrolled hypertension, congestive heart failure, history of prostate adenocarcinoma and benign prostatic hypertrophy are contraindications Pentoxifylline 400-800 mg by mouth 3 times daily Intralesional Triamcinolone 5-10 mg/ml intradermal (dose varies based on area of involvement) Topical Capsaicin 0.075% cream Nausea Dizziness Heartburn Vomiting Pain with injection Cutaneous atrophy and dyspigmentation Burning sensation and/or pain Dermatitis Compression Anabolic Agents Abbreviation: ABI, ankle brachial index. inhibitory effects of tacrolimus as important mechanisms for disease modification. Of 15 patients that completed the study with CVI, 13 showed improvement with 6 patients achieving 0-15% improvement of the involved area, 6 patients achieving 15-35% improvement, and one patient achieving greater than 35% improvement. The study showed statistically significant improvement in pain, edema, erythema, pigmentation, pruritus, and exudate.62 Anabolic Agents for Lipodermatosclerosis If tolerated, compression should be used to treat LDS. It is important to remember that patients with LDS often do not tolerate compression due to extreme skin tenderness. In addition to compression therapy, multiple publications have supported the use of stanozolol, an anabolic steroid with fibrinolytic properties.19 In a 6-month trial with 23 patients, Burnand et al showed an increased rate of LDS healing (based on involved area) with stanozolol 5 mg twice daily with compression compared to placebo with compression.63 In 1991, McMullin and colleagues showed similar results in a larger double-blind randomized controlled trial with 60 patients. After 6 months, those treated with graduated compression stockings (30-40 mm Hg) plus stanozolol 5 mg twice daily showed a 28% reduction of the involved area compared to a 14% reduction in patients treated with com- pression alone.64 The authors postulated that perivascular fibrin deposition in LDS created local hypoxia and eventually ulceration.64 They also suggested that stanozolol may improve oxygenation due to its fibrinolytic properties; however, transcutaneous oxygen measurements were not affected.64 Lower doses of 2 mg twice daily may also be successful in acute LDS with decreased pain in 3 weeks and decreased induration at 8-10 weeks.33 Stanozolol might even be considered as monotherapy when patients absolutely cannot tolerate compression due to pain. In an open trial of 17 patients, stanozolol 2 mg twice daily alone reduced dermal thickness (as measured by high resolution ultrasound) and pain after 8 weeks and all participants tolerated compression at the end of treatment.65 Stanozolol has reversible anabolic and androgenic effects,66 including sodium retention with edema and hypertension, hirsuitism, acne, liver function, lipid abnormalities, and dysmenorrhea. Patients on this medication should have their blood pressure closely monitored and undergo liver function tests every 3-4 weeks. If the latter become elevated, the dose should be reduced.19 This intervention is best avoided in patients with uncontrolled hypertension or congestive heart failure.33 Danazol, a weak androgen with fibrinolytic properties used for endometriosis and acquired angioedema, has been L.M. Morton and T.J. Phillips 174 reported in several cases to improve pain and induration of LDS at doses between 200 mg-400 mg (in divided twice daily dosing).67,68 However, the virilizing side effects can be marked.67 Unfortunately, manufacturers in the United States no longer distribute danazol due to its abuse among weight lifters.19 Oxandrolone, another anabolic agent with less androgenicity, has also been used. Because it undergoes less metabolism by the liver compared to the aforementioned agents, Segal and colleagues chose this medication in a patient with LDS and elevated liver enzymes. After 2 weeks of 100mg twice daily dosing, the patient experienced pain reduction and subjective softening of the skin.66 Pentoxifylline An alternative for patients who cannot tolerate or safely take stanozolol is pentoxifylline, a demethylxanthine derivative that increases red blood cell flexibility, alters fibroblast physiology, and stimulates fibrinolysis. Pentoxifylline is generally given in doses of 400 mg 3 times daily. A 2012 Cochrane Database review states that this agent improves venous ulcer healing when combined with compression or when used alone.69 A retrospective study published in 2012 supported the use of pentoxifylline 1200 mg daily in combination with hydroxychloroquine in dosages up to 6.5 mg/kg/day in the treatment of LDS. Without compression, 13 of 30 patients experienced complete remission of pain, edema resolution occurred in 14 of 15 patients, and erythema resolution occurred in 24 of 28 patients. Induration was significantly improved in 17 patients.70 For difficult cases, the dose of pentoxifylline may be increased to 800 mg 3 times daily. Side effects include nausea, dizziness, heartburn, and occasional vomiting. Other Nonsurgical Interventions Campbell and Miller have shown that intralesional triamcinolone at concentrations of 5-10 mg/ml effectively improves pain, edema, induration, and erythema of LDS.71 In their study of 28 patients, compression was also utilized and multiple treatments were required for lasting improvement.71 Intralesional therapy with platelet-rich plasma was used to treat a 76 year old man with LDS who failed multiple interventions including compression, anabolic steroids, pentoxifylline, antibiotics, nonsteroidal anti-inflammatory drugs, and surgery. He was given autologous platelet-rich plasma subcutaneously at 2-week intervals. Five treatments resulted in decreased pain, hyperpigmentation, induration, and eventual epithelialization of an associated leg ulcer. Platelet-richplasma may work by stimulating adipose tissue regeneration and angiogenesis.72 Topical capsaicin, frequently employed to treat localized pruritus, improved LDS in 2 patients who failed more conventional therapy. The topical 0.075% capsaicin cream was used for 3 weeks and the authors postulate that the cream may have fibrinolytic and antithrombotic effects.73 The least-invasive intervention utilized for LDS is ultrasound. In 2009, Damian et al reported 11 patients with longstanding LDS treated with 3 MHz of continuous ultrasound for 8 minutes 3 times weekly for 4-8 weeks. Patients also used compression stockings. A durometer was used to measure skin hardness; erythema was monitored by a reflectance erythema meter. This intervention improved pain and tenderness within 2 weeks. A total of 10 of 13 legs showed a reduction in hardness (averaging 60%) and 7 of 9 legs showed decreased erythema. No adverse events were reported.74 There is little evidence for this modality; however, it is certainly a safe intervention in recalcitrant disease and in patients unable to proceed with other therapeutic options. Surgical Intervention The best published data supporting venous ablation in CVI more specifically references venous leg ulcers. The 2004 ESCHAR study evaluated 500 patients with active or recently healed venous leg ulcers. Patients were randomly assigned to receive ablative superficial vein surgery with compression or compression alone. Data revealed that 24-week healing rates were similar between groups. Ulcer recurrence at 12 months was significantly reduced in the patients that also received surgery (12% vs 28%). For this reason, patients with documented superficial venous disease and a history of leg ulcers are generally referred for ablative surgery.75 Many studies of surgical intervention for venous insufficiency do not provide specific descriptions regarding improvement of LDS. In patients treated with saphenofemoral junction ligation and ultrasound-guided foam sclerotherapy, Figueiredo et al reported improved venous clinical severity scores, taking LDS into account.76 Conclusion Cutaneous disease is frequent in CVI. It is imperative that clinicians identify conditions such as venous eczema and LDS, differentiating them from similar appearing disorders with a thorough history and physical exam. While the most important aspect of management is compression therapy, this spectrum of disease offers an exciting avenue for further research since much of the literature to date focuses on the management of venous leg ulcers rather than venous eczema and LDS. Acknowledgements Thank you to Dr. Daniel Miller and Dr. Meera Mahalingam at Skin Pathology Laboratory at Boston University Medical Center for assisting with the acquisition of histopathologic images. References 1. Beebe-Dimmer JL, Pfeifer JR, Engle JS, Schottenfeld D. The epidemiology of chronic venous insufficiency and varicose veins. Ann Epidemiol. 2005;15(3):175-184. 2. Fowkes FG, Evans CJ, Lee AJ. Prevalence and risk factors of chronic venous insufficiency. Angiology. 2001;52(Suppl 1):S5-S15. 3. Eklöf B, Rutherford RB, Bergan JJ, et al. Revision of the CEAP classification for chronic venous disorders: consensus statement. J Vasc Surg. 2004;40(6):1248-1252. 4. Hamdan A. Management of varicose veins and venous insufficiency. JAMA. 2012;308(24):2612-2621. Venous eczema and lipodermatosclerosis 5. Raffetto JD. Dermal pathology, cellular biology, and inflammation in chronic venous disease. Thromb Res. 2009;123(Suppl 4):S66-S71. 6. Jünger M, Steins A, Hahn M, Häfner HM. 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