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Elephantiasis nostras verrucosa

Another skin complication that is associated with long term Lymphedema is called Elephantiasis nostras verrucosa or commonly called mossy foot. Another term more rarely used is woody edema of the legs. Many of us have this and it can be described as cobblestone-like nodules on the skin. It is most commonly associated with non-filarial lymphedema which is lymphedema caused by lymphatic obstruction, either as primary or secondary.

I was unable to find any real treatment for the condition itself, although the treatment of lymphedema generally helps both in decreasing the condition and if done early enough preventing it. From the medical sources, I found that their suggestions of treatment consisted of antibiotics for recurrent infections and treatment of the lymphedema. Personally, I question the use of antibiotics unless the verrucosa is specifically caused by a bacterial infection.

One rather frightening treatment was written about included shaving the verrucous area with a blade of a freehand knife and by subsequent abrading of the mossy area using a motor-powered grinder. The authors do claim that used with compression stockings the result was “aesthetically acceptable.” The article is included in our external links section.


Abstracts and Articles

A case of elephantiasis nostras verrucosa treated by acitretin.

Mar 2012

Polat M, Sereflican B.


Elephantiasis nostras verrucosa is a rare disorder characterized by dermal fibrosis, hyperkeratotic, verrucous, and papillomatous lesions that result from both chronic filarial and nonfilarial lymphedema. Various treatment options have been reported for this disease. We present a 64-year-old man with erythrodermic psoriasis and elephantiasis nostras verrucosa in whom the lesions were resolved almost completely after acitretin treatment


A Case of Elephantiasis Nostras Verrucosa

Yun-Seok Yang, M.D., Jae-Jun Ahn, M.D., Sik Haw, M.D., Min-Kyung Shin, M.D., and Choong-Rim Haw, M.D.

Ann Dermatol. 2009 August

Department of Dermatology, School of Medicine, Kyunghee University, Seoul, Korea. Corresponding author.

Reprint request to: Choong-Rim Haw, M.D., Department of Dermatology, School of Medicine, Kyunghee University, 1, Hoegi-dong, Dongdaemun-gu, Seoul 130-702, Korea. Tel: 82-2-958-8510, Fax: 82-2-969-6538,

Received March 13, 2009; Accepted April 2, 2009.

Keywords: Cellulitis, Elephantiasis, Elephantiasis nostras verrucosa, Venous stasis


Elephantiasis nostras verrucosa (ENV) is a rare clinical condition associated with chronic non-filarial lymphedema caused by bacterial or non-infectious lymphatic obstruction. A variety of etiologies, including infection, tumor obstruction, trauma, radiation, chronic venous stasis, congestive heart failure, and obesity, can lead to chronic lymphatic obstruction and edema. Mossy papules, plaques, and cobblestone-like nodules are clinically impressive features of ENV, but biopsy reveals only moderately abnormal findings such as pseudoepitheliomatous hyperplasia, dilated lymphatic spaces, fibrous tissue hyperplasia, and chronic inflammation. We present a case of ENV in a 67-year-old man with a 10-year history of multiple nodules and verrucous plaques on both feet. Microbiology ruled out a filarial infection. Nodule biopsy revealed pseudoepitheliomatous hyperplasia, marked dermal fibrosis, and a chronic inflammatory infiltrate. No evidence of carcinoma was identified. Both venous stasis and recurrent cellulitis could contribute to the dermal fibrotic changes of the lesions. However, before the recurrent cellulitis, he did not have any nodular lesions on his feet despite a 10-year history of venous disease. Therefore, this case suggests that venous stasis alone cannot produce the fibrotic nodular lesions of ENV.


In 1969, Castellani1 classified elephantiasis into four subtypes: 1) elephantiasis tropica - due to filariasis; 2) elephantiasis nostras - due to bacterial infection; 3) elephantiasis symptomatica - due to mycotic, syphilitic, tuberculoid, neoplastic, or traumatic causes of lymphatic obstruction; and 4) elephantiasis congenita - associated with inherited disorders such as Milroy's disease. Elephantiasis nostras verrucosa (ENV) was originally defined as a condition resulting from lymphatic blockage caused by recurrent bacterial infection and also called lymphangitis recurrens elephantogenica. However, many recent papers have included neoplastic, traumatic, and other noninfectious causes of lymphatic obstruction in the definition of ENV2-4.

ENV is a rare disease, and only one case of elephantiasis nostras has been described in the Korean dermatologic literature5. Herein, we report a case of ENV due to recurrent cellulitis and chronic venous stasis and offer suggestions concerning its possible pathogenesis.

Case Report

A 67-year-old man presented with a chief complaint of slowly enlarging multiple hard papules and plaques on both feet over the past 10 years. Ten years ago, he had been in the habit of drinking raw deer blood as a health food, and after that suffered from toxic erythema with some erosion on both feet. Subsequently, he was hospitalized several times for recurrent cellulitis of both feet. He first noticed venous symptoms such as heaviness of the legs, swelling, and mild pain while standing 20 years prior to presentation at our hospital but had declined any interventions that were recommended at other hospitals. Examination of the feet revealed confluent pinkish or brownish verrucous papules and plaques with a moss-covered appearance surrounding the peripheries of both feet from the tip of the toe to the back of the heel bilaterally (Fig. 1). Both of his legs exhibited brownish, non-pruritic maculopatches that had been present for 10 years after the toxic erythema, varicose veins, and mild, nonpitting edema below the knee. The patient reported no history of trauma, surgery or radiation, and no travel outside of Korea. He had no family history of familial lymphedema. Laboratory investigations showed a mildly elevated ESR (37 mm/hr), but a complete blood count with differential, biochemical and serologic tests were normal except for a glucose of 193 mg/dl due to uncontrolled type 2 diabetes mellitus. A peripheral blood smear and specific antigen testing for microfilaria resulted in negative findings. Microscopic examination of toe web scrapings on the KOH preparation and fungal culture were negative. Lower extremity computed tomographic angiography (CTA) revealed varicose veins with early venous drainage at both feet and ankles, and suggested a hyperemic state due to chronic inflammation. Excisional biopsy was performed on the great toe, with results showing hyperkeratosis and pseudoepitheliomatous hyperplasia as well as a fibrotic dermis with some dilated lymphatic channels (Fig. 2). Periodic acid-Schiff, and acid-fast bacilli stains were negative for fungal and mycobacterial organisms. Thus, a diagnosis of ENV was made based on these findings. The patient was treated with oral etretinate at a dose of 0.5 mg/kg/day and topical salicylic acid, but showed little improvement after 3 months. He was referred to the department of general surgery for the venous problem but refused any interventions. Unfortunately, the patient was lost to follow-up after 3 months of treatment.


Classically, the term elephantiasis applies to swelling of the legs caused by helminticWuchereria species. In such cases, patients are infested by filarial worms in tropical areas, where such parasites are endemic. The worms block lymphatic channels, leading to severe chronic swelling in the lower legs and genitals. In 1934, the term “nostras” was added to distinguish lymphedematous disorders of temperate regions not caused by filariasis6. In recent papers, however, the term ENV is more often used to denote a dermatological complication of bacterial or non-infectious lymphatic obstruction characterized by dermal fibrosis and epidermal changes consisting of hyperkeratotic, verrucous, and papillomatous lesions2,4,7,8. The lower extremities are the most common site of ENV, but any area with chronic lymphedema can be affected2.

Although recurrent streptococcal lymphangitis may contribute to the origin of ENV, the exact pathogenesis of the disorder is not yet clear4. A variety of etiologies can lead to lymphatic obstruction and edema, and the resultant prolonged accumulation of protein-rich interstitial fluid in the affected area induces fibroblast proliferation and increases susceptibility to infection and inflammation, which in turn leads to further fibrosis of the dermis and lymph channels2,4,9. The underlying causes of lymphatic obstruction can be bacterial infection, malignancy, lymphangioma, prior surgery or trauma, and lymphatic fibrosis due to radiation therapy, although chronic venous stasis, obesity, and scleroderma should also be considered4,7. In chronic venous disease, activated leukocytes may migrate out of the vasculature and release TGF-β1, stimulating collagen production by dermal fibroblasts, which culminates in dermal and lymphatic fibrosis10. In our case, the patient had a history of recurrent cellulitis and also had chronic venous stasis, both of which could contribute to the dermal fibrotic changes. However, before the recurrent cellulitis, he did not have any nodular lesions on his feet despite suffering from venous disease for the previous 10 years, suggesting that venous stasis alone did not cause the fibrotic nodular lesions. This agrees with a previous report that mere lymphatic obstruction or venous stasis does not cause dermal fibrosis without recurrent bacterial lymphangitis11.

Histologically, pseudoepitheliomatous hyperplasia, dilated lymphatic spaces, and fibrosis are characteristic of ENV, but not all of these findings may be present during the advanced stage2. The patient's history and characteristic skin changes were sufficient to diagnose ENV. However, histopathologic examination of biopsy specimens and imaging techniques such as lymphangiography, lymphoscintigraphy, computed tomography (CT), and magnetic resonance imaging (MRI) may provide further cues to differentiate ENV from other disorders such as an obstructing tumor.

Differential diagnoses include chromoblastomycosis, filariasis, lipodermatosclerosis, verrucous carcinoma, papular mucinosis, and pretibial myxedema2. Chromoblastomycosis or filariasis can be diagnosed by laboratory identification of causative organisms. Lipodermatosclerosis is a condition that affects the skin just above the ankle in patients with long-standing venous disease, resulting in chronic venous insufficiency, with biopsy revealing fibrin deposits around the capillaries12. Verrucous carcinoma and papular mucinosis can be ruled out by histopathologic findings such as atypical keratinocytes in the verrucous carcinoma or acid glycosaminoglycan deposition in the papular mucinosis. Pretibial myxedema is a manifestation of Graves' disease preceded by ophthalmopathy and thyroid gland enlargement, and is histologically differentiated from ENV by the presence of increased hyaluronan and chondroitin sulfates in the dermis, but ENV can be a rare variant of pretibial myxedema13. ENV may also occur as a sequela of chronic venous stasis as mentioned above. However, ENV should be differentiated from venous stasis dermatitis, which typically leads to pitting edema associated with erythematous, scaly, pruritic patches9. Our patient did not complain of any pruritus or scales, and his lower legs showed non-pitting edema. Thus, the lesions on his feet cannot be diagnosed as venous stasis dermatitis.

Treatments for ENV include conservative measures to reduce lymphostasis (compressive stockings, mechanical massage), medical management of edema by diuretics, and prevention of recurrent infection by prolonged courses of antibiotics2. Oral retinoids may be effective, but the sustainability of these results appears variable14. Rarely, surgical debridement or amputation is performed in recalcitrant cases15.

Chronic nodular skin changes are almost always progressive, and management of advanced stages usually results in unsatisfactory outcomes. Therefore, it is important to recognize this rare condition in its initial stages and control infection and edema as soon as possible to prevent debilitating deformities. In addition, the underlying cause of lymphatic obstruction should be investigated and treated to the maximal extent possible.

PubMed Central Annals of Dermatology

Elephantiasis nostras verrucosa or "mossy foot lesions" in lymphedema praecox: report of a case.

Duckworth AL, Husain J, Deheer P.

St. John North Shores Hospital, Harrison Township, MI, USA.


Elephantiasis nostras verrucosa is a rare disorder that results from chronic obstructive lymphedema. It is characterized clinically by deforming, nonpitting edema; malodorous hyperkeratosis with generalized lichenification; cobblestoned papules; and verrucous changes, that often result in extreme enlargement of the involved body part. Although elephantiasis nostras verrucosa is striking in clinical appearance, biopsy reveals only moderately abnormal findings: pseudoepitheliomatous hyperplasia with dilated lymphatic spaces in the dermis, accompanied by chronic inflammation and fibroblast proliferation. The term elephantiasis nostras (nostras means “from our region”) has traditionally been used to differentiate temperate zone disease from the classic disease process, elephantiasis tropica, which is defined by chronic filarial lymphatic obstruction caused by Wuchereria bancrofti, Wuchereria malayi, or Wuchereria pacifica. We present a case report of elephantiasis nostras verrucosa arising as a result of lymphedema praecox.

Journal of the American Podiatric Medical Association Online.

Elephantiasis nostras verrucosa: an institutional analysis of 21 cases.

Dean SM, Zirwas MJ, Horst AV.


Department of Cardiovascular Medicine, Ohio State University College of Medicine, Columbus, Ohio 43210, USA.



Previous reports regarding elephantiasis nostras verrucosa (ENV) have been typically limited to 3 or fewer patients.


We sought to statistically ascertain what demographic features and clinical variables are associated with ENV.

METHODS: A retrospective chart review of 21 patients with ENV from 2006 to 2008 was performed and statistically analyzed.


All 21 patients were obese (morbid obesity in 91%) with a mean body mass index of 55.8. The average maximal calf circumference was 63.7 cm. Concurrent chronic venous insufficiency was identified in 15 patients (71%). ENV was predominantly bilateral (86%) and typically involved the calves (81%). Proximal cutaneous involvement (thighs 19%/abdomen 9.5%) was less common. Eighteen (86%) related a history of lower extremity cellulitis/lymphangitis and/or manifested soft-tissue infection upon presentation. Multisegmental ENV was statistically more likely in setting of a higher body mass index (P = .02), larger calf circumference (P = .01), multiple lymphedema risk factors (P = .05), ulcerations (P < .001), and nodules (P < .001). Calf circumference was significantly and proportionally linked to developing lower extremity ulcerations (P = .02). Ulcerations and nodules were significantly prone to occur concomitantly (P = .05). Nodules appeared more likely to exist in the presence of a higher body mass index (P = .06) and multiple lymphedema risk factors (P = .06).


The statistical conclusions were potentially inhibited by the relatively small cohort. The study was retrospective.


Our data confirm the association among obesity, soft-tissue infection, and ENV. Chronic venous insufficiency may be an underappreciated risk factor in the genesis of ENV.


2010 American Academy of Dermatology, Inc. Published by Mosby, Inc.

Elephantiasis nostras verrucosa on the abdomen of a Turkish female patient caused by morbid obesity.

Aug 2010

Buyuktas D, Arslan E, Celik O, Tasan E, Demirkesen C, Gundogdu S.

Source Division of Endocrinology and Metabolism, Department of Internal Medicine, Cerrahpasa Medical School, University of Istanbul, Istanbul, Turkey.


Elephantiasis Nostras Verrucosa is a rare disorder of an extremity or a body region, which is associated with chronic lymphedema. There are 7 reported cases of abdominal elephantiasis in the medical literature. Here we report a morbidly obese female patient with elephantiasis nostras verrucosa on the abdominal wall.


Elephantiasis Nostras Verrucosa (ENV) is a rare, chronic, deformative, dermatological disorder that is characterized by dermal fibrosis and hyperkeratotic, verrucous, and papillomatous lesions. Chronic non-filarial lymphatic obstruction plays an important role in its pathogenesis [1]. Although it can affect any body region, it usually involves the lower extremities and the external genitalia. Elephantiasis Nostras Verrucosa involving the abdominal wall is uncommon. This report is about a morbidly obese woman who had elephantiasis nostras verrucosa lesions on the abdominal wall.

A 33-year-old woman with morbid obesity who suffered from progressive deformative edema and fibrosis of the abdominal wall was referred to our department. She reported one episode of cellulitis of her left leg 5 years prior to presentation; she had been suffering from abdominal lesions for 4 years. Her medical history was negative for filariasis, congestive heart failure, liver or renal disease, surgery, radiation therapy, and neoplastic disorders. She had no family history of familial lymphedema. The abdominal wall and legs were edematous. The body mass index was 72 kg/m². She had cobblestone-like, thickened, hyperpigmented and fissured plaques on the abdomen (Figure 1). A biopsy was performed from the abdominal skin. Histopathological examination showed dermal fibrosis, acanthosis of the epidermis, and vessel proliferation, which are characteristic of ENV (Figure 2).

She was evaluated for conditions other than obesity, which can lead to ENV. There were no abdominal masses (that could cause lymphatic obstruction) noted with abdominal ultrasonography. There was no sign of hepatic, renal, or thyroid disease by laboratory analysis. She had no signs of cardiac failure clinically or by echocardiography.

Treatment for obesity was initiated. Surgical treatment could not be performed considering the high risk of morbidity and mortality caused by her morbid obesity and obstructive sleep apnea.

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elephantiasis_nostras_verrucosa.txt · Last modified: 2012/10/16 14:40 (external edit)