Dermatophyte resistance - on the rise.

Dermatophytes are group of filamentous fungi which have adapted to living on the skin of humans and other animals. In the last decade, reports have emerged from Asia of new dermatophyte strains showing resistance to the commonly used antifungal agent terbinafine and others. The spread of these resistant strains has been noted in many other countries globally. Little is known about the mechanisms or management of this emerging problem. Urgent research and changes to current practice are required if the spread of the infection is to be contained and managed effectively.

The treatment of plantar warts using microwave-A review of 85 consecutive cases in the United States.

BACKGROUND: Plantar warts (verrucae plantaris) are a common source of pain for patients and are often refractory to treatment. Previous work has shown a high clearance rate of verrucae using a surface-based microwave device (Swift®). AIMS: To assess the efficacy, defined as the complete visible clearance of warts, in patients with verrucae plantaris receiving microwave treatment. PATIENTS: We undertook a retrospective review and identified records of 85 patients who underwent a course of microwave treatment at a single US-based podiatry centre. Efficacy was analyzed on the basis on intention-to-treat. RESULTS: In patients who received ≥1 session there was a complete clearance rate of 60.0% (51/85) (intention-to-treat; 59 patients completed treatment, 26 lost to follow-up) and 86.4% (51/59) per treatment completion; no significant differences in clearance rates of children and adults were observed (61.0% [25/41] vs. 59.1% [26/44]). There were 31 patients who received three sessions of microwave therapy with a clearance rate of 71.0% (22/31) as per intention-to-treat (27 patients completed treatment, 4 lost to follow-up). An average of 2.3 sessions (SD: 1.1; range: 1-6) was required for the complete clearance of plantar warts. Complete clearance was also observed in some patients with recalcitrant warts following additional treatment sessions (42.9% [3/7]). A significant reduction in wart related pain was reported for all patients undergoing treatment. Some patients continued to report a reduced amount of pain post-therapy compared with pretherapy. CONCLUSIONS: Microwave treatment of verrucae plantaris appears to be a safe and effective procedure.

Successful Treatment of Hard Corns in Two Patients Using Microwave Energy.

Corns are a common foot problem accounting for nearly half of all problems seen within podiatry and chiropody clinics. Hard corns are concentrated areas of hyperkeratosis within the stratum corneum, typically found on the weight-bearing (plantar) surfaces of the feet. For many patients, they are a source of pain and have been shown to negatively affect a patient's activity and quality of life. Most of the currently available treatments are short-lived in their effectiveness, with corns frequently being recurrent, requiring repeated visits to remove the painful lesions. The use of handheld microwave devices indicated for surface applications has demonstrated effectiveness in clearing recalcitrant plantar warts and significantly reducing the pain associated with them. The authors report 2 cases of patients with persistent and painful plantar corns who underwent microwave treatment of their plantar corns with a successful, lasting reduction in pain levels after the intervention. Further work is required to fully assess the potential of this treatment modality in the management of painful plantar corns.

The mystery of the COVID toes - turning evidence-based medicine on its head.

The recent and rapid emergence of COVID-19 infection has led to a flood of publications describing all aspects of the disease and its presentation. The appearance of chilblain-like lesions, in children and young adults has particularly caught the attention of healthcare professionals with an interest in the foot. With such a novel infection, demand for information is high at a time when evidence is scarce. Consequently, there has been a renaissance in the publication of case studies. This type of research, previously relegated from many mainstream journals, as a low level source of evidence, has permitted the rapid reporting, publication and dissemination of much needed clinical data which can be used as a foundation to inform further research and investigations about a new global infection.

The effectiveness of lasers in the treatment of onychomycosis: a systematic review.

BACKGROUND: Onychomycosis is a common nail pathology which has proven to be a treatment challenge to healthcare professionals. Antifungal drugs have been the mainstay of therapy for many years. Recently, laser technologies have been introduced as a treatment for onychomycosis avoiding the disadvantages of systemic and topical drug therapies, offering a rapid treatment for an often persistent nail condition. The purpose of this study was to review published evidence regarding the effectiveness of laser technologies in the treatment of onychomycosis. METHODS: The primary question for this review was "what evidence is there for the use of lasers in the treatment of onychomycosis"? A systematic literature search of published papers indexed on Pubmed and Web of Science® was undertaken in June 2014 for original, published research. The primary outcome measures for efficacy were mycological cure and clearance of the affected nail (clinical cure). RESULTS: This review returned a total of twelve eligible published studies evaluating the use of lasers in the treatment of onychomycosis. Two were randomised controlled trials, four were comparative design studies (with no placebo/control groups) and the remainder were case series. The level of evidence was generally low level reflecting predominantly small sample size and lack of control groups. The results from studies were conflicting and follow up periods for patients in studies were generally short. Many studies excluded patients with severe or dystrophic onychomycosis. CONCLUSIONS: The evidence pertaining to the effectiveness of laser treatment of onychomycosis is limited and of poor methodological quality. Future studies using a randomised controlled trial designs with larger study populations and clear procedures are required to permit a full evaluation of this emerging technology.

Pitted keratolysis: a clinical review.

BACKGROUND: Pitted keratolysis is a bacterial infection that affects the plantar epidermis. Despite the condition being reported in many countries affecting both shod and unshod populations, there is little guidance for clinicians providing evidence or best practice guidelines on the management of this often stubborn infection. METHODS: Using a structured search of a range of databases, papers were identified that reported treatments tested on patients with the condition. RESULTS: Most of the literature uncovered was generally of a low level, such as case-based reporting or small case series. Studies were focused mainly on the use of topical antibiotic agents, such as clindamycin, erythromycin, fusidic acid, and mupirocin, often in combination with other measures, such as hygiene advice and the use of antiperspirants. From the limited evidence available, the use of topical antibiotic agents shows some efficacy in the treatment of pitted keratolysis. However, there is currently no suggestion that oral antibiotic drug therapy alone is effective in managing the condition. CONCLUSIONS: Currently, there is no consensus on the most effective approach to managing pitted keratolysis, but a combination of antimicrobial agents and adjunctive measures, such as antiperspirants, seems to demonstrate the most effective approach from the current literature available.

Dermatology within the UK podiatric literature: a content analysis (1989-2010).

BACKGROUND: Although dermatology, as a medical subject, has been a facet of the training and education of podiatrists for many years, it is, arguably, only in recent years that the speciality of podiatric dermatology has emerged within the profession. Some indication of this gradual development may be identified through a content analysis of the podiatric literature in the UK, spanning a 21 year timeframe. METHOD: 6 key professional journals were selected for content analysis in order to provide a picture of the emergence and development of podiatric dermatology over a period extending from 1989 to 2010. Both syntactical and thematic unitization were deployed in the analysis, revealing both manifest and latent content. Categories were devised using a prior coding, a codebook produced to define relevant concepts and category characteristics, and the coding scheme subject to an assessment of reliability. RESULTS: 1611 units appeared in the 6 journals across a 21 year timeframe. 88% (n = 1417) occurred in one journal (Podiatry Now and its predecessors). Modal categories within all journals included course adverts (n = 673), commercial adverts (n = 562) and articles by podiatrists (n = 133). There was an overall rise from 40 per annum in 1989, to over 100 in 2010. A wider range of dermatological topics were addressed, ranging from fungal nail infections to melanoma. CONCLUSIONS: It is evident from this analysis that there has been an increasing focus on dermatology as a topic within the main podiatric journals in the UK over the last 21 years, primarily reflecting a rise in commercial advertising and an increase in academic dermatology related publications. Whilst earlier publications tended to focus on warts and fungal infections, more recent publications address a broader spectrum of topics. Changes in prescribing rights may be relevant to these findings, as may the enhanced professional and regulatory body requirements on continuing professional development.

Clinical guidelines for the recognition of melanoma of the foot and nail unit.

Malignant melanoma is a life threatening skin tumour which may arise on the foot. The prognosis for the condition is good when lesions are diagnosed and treated early. However, lesions arising on the soles and within the nail unit can be difficult to recognise leading to delays in diagnosis. These guidelines have been drafted to alert health care practitioners to the early signs of the disease so an early diagnosis can be sought.

Development of a practical guide for the early recognition for malignant melanoma of the foot and nail unit.

BACKGROUND: Malignant melanoma is a rare but potentially lethal form of cancer which may arise on the foot. Evidence suggests that due to misdiagnosis and later recognition, foot melanoma has a poorer prognosis than cutaneous melanoma elsewhere. METHODS: A panel of experts representing podiatry and dermatologists with a special interest in skin oncology was assembled to review the literature and clinical evidence to develop a clinical guide for the early recognition of plantar and nail unit melanoma. RESULTS: A systematic review of the literature revealed little high quality data to inform the guide. However a significant number of case reports and series were available for analysis. From these, the salient features were collated and summarised into the guide. Based on these features a new acronym "CUBED" for foot melanoma was drafted and incorporated in the guide. CONCLUSIONS: The use of this guide may help clinicians in their assessment of suspicious lesions on the foot (including the nail unit). Earlier detection of suspicious pedal lesions may facilitate earlier referral for expert assessment and definitive diagnosis. The guide is currently being field tested amongst practitioners.

Dermoscopy as a technique for the early identification of foot melanoma.

Malignant melanoma is the most common primary malignant tumour arising on the foot. Where improvements in the prognosis have been observed for patients with melanoma elsewhere on the skin, pedal lesions are still frequently delayed in presentation through neglect or misdiagnosis. Detection of foot melanoma relies on the health care practitioner's skills and observations in recognising early changes. Recent publications have documented the use a dermoscopy as a tool to improve recognition of such suspicious lesions. This paper reviews current literature with a special emphasis of its potential applications on plantar and nail unit melanoma. Data from these studies suggest that the technique is a useful and significant adjunct to clinical examination, which ultimately may lead to earlier recognition of this aggressive tumour.

Acral lentiginous melanoma of the foot and ankle: A case series and review of the literature.

BACKGROUND: Acral lentiginous melanoma (ALM) is an uncommon, cutaneous malignant tumour which may arise on the foot. Its relative rarity, atypical appearance and late presentation frequently serve as poor prognostic indicators. METHODS: At a tertiary skin tumour centre, a retrospective review was undertaken of all patients diagnosed with the tumour at the level of ankle or below. RESULTS: Over a six year period, 27 cases (20 female, 7 male) were identified with positive histology confirming the disease. The age ranged from 35-96 years of age (mean 62.7 years). The majority of the cohort were white (59%) with plantar lesions (62%). 33% of patients were initially were diagnosed incorrectly. The average time taken from the point of recognition, by the patient, to the lesion being correctly diagnosed was around 13.5 months. CONCLUSION: Earlier diagnosis of ALM requires education at both a patient and practitioner level.

Topical and oral combination therapy for toenail onychomycosis: an updated review.

Although effective, oral antifungal therapy is still not completely successful. Recent studies have shown that combination therapy with oral and topical agents offers an increased cure rate for patients. We review the main drug combinations that have been tested. Additional measures, such as mechanical intervention, may help improve response rates further.