Necrobiosis lipoidica of the glans penis

Pentoxifylline in dermatology

BACKGROUND

Pentoxifylline was initially marketed for use in patients with intermittent claudication due to chronic occlusive arterial disease of the extremities but has since been shown to have several off-label uses in dermatology.

AIMS

The aim of this review is to increase awareness of the several applications of pentoxifylline in the field of dermatology.

METHODS

A comprehensive PubMed search was conducted in May 2022 using the following phrases "dermatology" AND "pentoxifylline." Our search period spanned 34 years from 1988 to 2022. All available literature was reviewed. Reference lists of identified articles were included. Studies were excluded if they were not in English and if the study was out of scope. Eighty-one articles were included in this review.

RESULTS

Pentoxifylline has been used to treat various dermatological conditions including peripheral vascular disease, vasculitis and vasculopathies, chilblains, pigmented purpuric dermatosis, granuloma annulare, necrobiosis, keloids, lichen sclerosis et atrophicus, scars, radiation-induced fibrosis, vitiligo, alopecia areata, leishmaniasis, and leprosy.

CONCLUSIONS

Pentoxifylline's use in dermatology is growing. However, there are limited larger studies and randomized control trials on the use of pentoxifylline in dermatology and more investigation is needed to evaluate its use for many dermatologic conditions. Pentoxifylline's unique mechanism of action as well as its good tolerability, cost-effectiveness, and minimal drug interactions make it a convenient primary or adjunctive option in many dermatological conditions.

Truncal necrobiosis lipoidica diabeticorum: A first case report

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Necrobiosis lipoidica is a rare chronic dermatitis found in diabetic patients.

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These skin lesions affect 0.3–1.2% of patients with diabetes mellitus.

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Our patient developed necrobiosis lipoidica on the trunk, an unusual location.

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Treatment of necrobiosis lipoidica is difficult, related to good glycemic control.

Introduction

Necrobiosis lipoidica (NL) is a known chronic rare granulomatous dermatitis. NL typically occurs in the lower extremity, there have only been previously reported cases of NL on the face, scalp, forearms, and dorsum of the hands. However, truncal NL is not a typical location.

Presentation of case

A 67-year-old man known to have diabetes type 2, presented with a 3-year history of painful and itchy skin lesions on the right lateral chest wall. On clinical examination, he had a red discolored patch with superficial capillaries and yellow discoloration at the center. Based on the histological examination, necrobiosis lipoidica was confirmed. Initial treatment with clobetasol propionate, tacrolimus, and topical corticosteroid cream was unsuccessful, and further NL lesions developed on the lower limb.

Discussion

NL rash is characterized by its location in the lower limbs and rarely involves fingers, hands, scalp, or face. It is noteworthy that the patient presented with NL skin lesions bon the trunk, which is outside the usual presentation. The prevalence of NL ranges from 0.3% to 1.2% among patients with diabetes mellitus. The treatment of NL is usually difficult. Initial management includes smoking cessation and proper diabetes control. In addition, intralesional and topical corticosteroids might be effective. In this case report, there was no improvement in NL despite the use of topical corticosteroids.

Conclusion

Immediate diagnosis and treatment of NL may prevent disease progression; therefore, the diagnosis of NL should be considered, even in an unusual location.

Diabetes mellitus and the skin

Several dermatoses are routinely associated with diabetes mellitus, especially in patients with chronic disease. This relationship can be easily proven in some skin disorders, but it is not so clear in others. Dermatoses such necrobiosis lipoidica, granuloma annulare, acanthosis nigricans and others are discussed in this text, with an emphasis on proven link with the diabetes or not, disease identification and treatment strategy used to control those dermatoses and diabetes.

Necrobiosis Lipoidica

Necrobiosis lipoidica is a granulomatous condition presenting as indolent atrophic plaques, often on the lower extremities. There is a multitude of case reports suggesting possible associations and documenting different therapeutic alternatives with varied success. Important complications include ulceration and the development of squamous cell carcinoma. The disease course is often indolent and recurrent despite treatment. This article reviews the etiopathogenesis, clinical presentations, and evidence for treatment alternatives of this condition.

Pentoxifylline: An effective therapy for necrobiosis lipoidica

Necrobiosis lipoidica (NL) is a rare chronic inflammatory granulomatous skin disorder that remains challenging to treat. Here we report three patients at different stages of disease successfully treated with pentoxifylline, a haemorrheological and anti-inflammatory agent. We demonstrate for the first time that early stage NL may be completely reversible with this treatment. Our findings are also consistent with previous isolated reports showing the effectiveness of pentoxifylline in treating ulcerative NL.

Ocorrência simultânea de necrobiose lipoídica ulcerada e granuloma anular em um paciente: relato de caso

Ocorrência simultânea de granuloma anular e necrobiose lipoídica é rara. Sete casos dessa associação foram encontrados na literatura, sendo somente um de necrobiose lipoídica ulcerada. Relata-se caso de concomitância de granuloma anular e necrobiose lipoídica ulcerada, não associada a diabetes mellitus, em paciente masculino de 39 anos, com confirmação histopatológica.

Granuloma annulare of the penis: a uncommon location for an usual disease

The subcutaneous clinical variant of granuloma annulare (GA) is rare and tends to present more frequently in children, in locations unusual for conventional GA. Involvement of the penis is exceptional and has been rarely reported. Most cases are located in the shaft of the penis and tend to persist without spontaneous remission. Diagnosis is done only after biopsy, and surgical resection of the lesions is not unusual. We report a new case of subcutaneous GA of the penis in a 13-year-old boy with lesions persistent for the past year. Surgical excision of one of them allowed the correct diagnosis. No further treatment was done, and the condition has not remitted 1 year later. We stress the importance of clinical recognition of unusual presentations of GA to avoid overtreatment of lesions that do not need an aggressive approach.