[Atypical involvement of purpuric syndrome caused by parvovirus B19. Case report in a 12-year-old female]. / Síndrome purpúrico de distribución atípica por parvovirus B19 en una adolescente.

Parvovirus B19 is the cause of a variety of exanthematous diseases during childhood and adolescence, such as erythema infectiosum and papular purpuric gloves and socks syndrome. This is an unusual, benign and acute acrodermatitis. Aphtous stomatitis, fever and other systemic symptoms can be associated with the eruption of the purpuric rash. Uncommon patterns such as asymmetrical distribution or erythematous involvement llave recently been described as additional features of PVB19-associated purpuric petechial eruption. This is a case report of a 12-year-old female with an atypical involvement of a papular-purpuric syndrome caused by human parvovirus B19.

Síndrome purpúrico de distribución atípica por parvovirus B19 en una adolescente / Atypical involvement of purpuric syndrome caused by parvovirus B19: case report in a 12-year-old female

Resumen El parvovirus B19 es causante de una variedad de enfermedades exantemáticas durante la infancia y adolescencia, como el eritema infeccioso y el síndrome papular purpúrico en guante y calcetín. Este último es una acrodermatitis aguda, inusual y benigna, que puede asociarse a aftas orales, fiebre y otros síntomas constitucionales. Existen casos atípicos como la púrpura febril en otras localizaciones, sin cumplir la distribución característica en guante y calcetín de forma simétrica o con un mayor componente de eritrodermia. Presentamos el caso de una adolescente de 12 años con un síndrome papular purpúrico de distribución atípica por parvovirus B19.

Abstract Parvovirus B19 is the cause of a variety of exanthematous diseases during childhood and adolescence, such as erythema infectiosum and papular purpuric gloves and socks syndrome. This is an unusual, benign and acute acrodermatitis. Aphtous stomatitis, fever and other systemic symptoms can be associated with the eruption of the purpuric rash. Uncommon patterns such as asymmetrical distribution or erythematous involvement llave recently been described as additional features of PVB19-associated purpuric petechial eruption. This is a case report of a 12-year-old female with an atypical involvement of a papular-purpuric syndrome caused by human parvovirus B19.

Toe Web Infection: Epidemiology and Risk Factors in a Large Cohort Study.

INTRODUCTION: Toe web infection (TWI) is a bacterial infection of the interdigital space. In most cases, the infection is caused by gram-negative bacteria, secondary to a chronic fungal infection (dermatophytosis). The typical presentation includes macerations and erosions in the interdigital space. Predisposing factors include interdigital tinea, hyperhidrosis, and humidity. OBJECTIVE: The aim of this study was to characterize the TWI patient population and identify associated risk factors. METHODS: We conducted a retrospective study of patients diagnosed with TWI from 2006 to 2020 at Sheba Medical Center, Israel. Collected data included patients' demographics (age, sex, weight, and occupation), smoking pack-years, comorbidities, medications, and course of disease. RESULTS: A total of 200 patients were diagnosed with TWI. The median age at diagnosis was 51 years. The majority of the patients were men (72.5%). The most common comorbidities were dyslipidemia, hypertension, diabetes, and ischemic heart disease. We found that 71.2% of patients were smokers, and 46.4% of patients had occupations that required closed-toe shoes. TWI incidence did not increase seasonally. Bilateral TWI was found in 50% of the patients, 33% had recurrent infections, and 20% had secondary cellulitis. CONCLUSIONS: Smoking and diabetes were more prevalent among TWI patients than in the general population, and there was a correlation between smoking and TWI recurrences. We identified risk factors for TWI to identify at-risk populations.

[Painful nodules on the soles in a pediatric patient: A diagnostic challenge]. / Nodulos plantares dolorosos tras ejercicio intenso en paciente pediátrica: Un reto diagnóstico.

INTRODUCTION: Idiopathic Palmoplantar Eccrine Hidradenitis (IPPH) is a rare neutrophilic derma tosis, with painful erythematous nodules of sudden onset in the plantar or palmoplantar region, in children without other underlying diseases. OBJECTIVE: To present a case that shows the main clinical and histological characteristics of this entity. CLINICAL CASE: 11-year-old girl with a 48-hours history of painful erythematous-violaceous nodules on the right foot plant associated with fever of up to 38.2 °C, with no history of interest except hyperhidrosis and intense exercising on previous days. Given the clinical suspicion of IPPH, a skin biopsy was performed, which showed inflammatory neutrophil infiltration around eccrine sweat glands and neutrophilic abscesses, confirming the diagnosis. Oral NSAIDs and rest were prescribed, with resolution of the lesions in 7 days. CONCLUSIONS: This case demonstrates the most important aspects of this entity, in many cases underdiagnosed, since it can be confused with other pathologies that occur with painful acral nodules, but have different pathogenic and therapeutic implications. To properly identify the IPPH allows preventing an unnecessary alarm, both patients and their parents, as in dermatologists and pediatricians themselves.

Nodulos plantares dolorosos tras ejercicio intenso en paciente pediátrica: un reto diagnóstico / Painful nodules on the soles in a pediatric patient: a diagnostic challenge

Resumen: Introducción: La Hidradenitis palmoplantar ecrina idiopática (HPPI) es una dermatosis neutrofílica infrecuente, que cursa con nódulos eritematosos dolorosos de comienzo brusco en regiones plantares o palmoplantares, en niños que no tienen otra enfermedad subyacente. Objetivo: Presentar un caso que ilustra las principales características clínicas e histológicas de la HPPI. Caso Clínico: Niña de 11 años evaluada por nódulos eritematovioláceos dolorosos en planta de pie derecho de 48 horas de evo lución y fiebre de hasta 38,2 °C, sin antecedentes de interés salvo hiperhidrosis y práctica intensa de ejercicio en los días previos. Ante la sospecha clínica de HPPI se realizó biopsia cutánea, que mostró infiltrado inflamatorio neutrofílico alrededor de glándulas sudoríparas ecrinas y abscesos de neutrófilos, confirmando el diagnóstico. Se indicaron antiinflamatorios no esteroidales orales y reposo, con resolución de las lesiones en 7 días. Conclusiones: Este caso demuestra los aspectos más importantes de la HPPI. Esta entidad en muchos casos es infradiagnosticada, dado que puede confundirse con otras patologías que también cursan con nódulos acrales dolorosos, pero tienen distintas implicacio nes patogénicas y terapéuticas. Identificar apropiadamente la HPPI permite evitar la alarma innece saria, tanto en pacientes y sus padres, como en los propios dermatólogos y pediatras.

Abstract: Introduction: Idiopathic Palmoplantar Eccrine Hidradenitis (IPPH) is a rare neutrophilic derma tosis, with painful erythematous nodules of sudden onset in the plantar or palmoplantar region, in children without other underlying diseases. Objective: To present a case that shows the main clinical and histological characteristics of this entity. Clinical Case: 11-year-old girl with a 48-hours history of painful erythematous-violaceous nodules on the right foot plant associated with fever of up to 38.2 °C, with no history of interest except hyperhidrosis and intense exercising on previous days. Given the clinical suspicion of IPPH, a skin biopsy was performed, which showed inflammatory neutrophil infiltration around eccrine sweat glands and neutrophilic abscesses, confirming the diagnosis. Oral NSAIDs and rest were prescribed, with resolution of the lesions in 7 days. Conclusions: This case demonstrates the most important aspects of this entity, in many cases underdiagnosed, since it can be confused with other pathologies that occur with painful acral nodules, but have different pathogenic and therapeutic implications. To properly identify the IPPH allows preventing an unnecessary alarm, both patients and their parents, as in dermatologists and pediatricians themselves.

Elephantiasis nostras verrucosa in the setting of lymphoedema tarda and neurofibromatosis type 1.

Elephantiasis nostras verrucosa (ENV) comprises an uncommon skin disease characterised by dermal fibrosis with hyperkeratotic, verrucous and papillomatous lesions that usually occur after chronic lymphoedema. We describe the case of a 56-year-old-man with neurofibromatosis type 1, no known surgical history, no chronic medication and no travel history, presenting with worsening non-pitting oedema and impressive foul-smelling mossy plaques and cobblestone-like nodules in both legs and feet, especially on the right, compatible with the diagnosis of ENV.

Onychocryptosis and asymptomatic external urethritis as complications of oral isotretinoin therapy.

This case report presents a patient who, while undergoing oral isotretinoin therapy for acne vulgaris, developed onychocryptosis and asymptomatic external urethritis. These uncommon adverse events are not well-documented in medical literature. While his urethritis spontaneously resolved, his onychocryptosis symptoms necessitated surgical intervention. This report illustrates both cosmetic and functional adverse effects of isotretinoin and provides insight into the progression of these reactions over time.

Topical Tavaborole in the Treatment of Onychomycosis Complicated by Dermatophytoma: A Post-hoc Assessment of Phase II Subjects.

Dermatophytoma is a little-known, difficult to treat fungal infection that complicates onychomycosis. First described by Roberts and Evans in the late 1990's, dermatophytoma presents as a dense concentration of fungal hyphae within or under the nail plate and is generally white or yellow/brown in color, and linear (streaks) or round (patches) in shape; primary etiologic organisms are dermatophytes. Oral antifungals have limited success in treating dermatophytoma owing to difficulties accessing and penetrating what is hypothesized to be a fungal biofilm. In this respect, dermatophytoma is generally treated with a combination therapy approach, often including both surgical and pharmacologic intervention for improved outcomes. A post-hoc assessment of Phase II tavaborole onychomycosis studies was conducted in order to assess the prevalence of dermatophytoma and outcomes in patients treated with topical tavaborole. Of the 366 subjects enrolled in the Phase II onychomycosis studies, we identified 102 cases of dermatophytoma; 21 of 86 (24.4%) subjects treated with tavaborole were able to achieve complete resolution of dermatophytoma by day 180, while no subjects on vehicle obtained resolution. Similarly, 23 of 86 subjects (26.7%) treated with tavaborole solution had complete resolution of dermatophytoma by day 360, while only 1 of 16 subjects (6.3%) on vehicle obtained resolution. Moreover, 13 of 19 subjects (68.4%) treated with tavaborole solution were able to sustain resolution, while only 6 of 19 (31.6%) had reoccurrence, of dermatophytoma during the 180-day washout period (day 360). We present 5 cases of dermatophytoma identified in Phase II trials that responded in a positive manner following treatment with tavaborole solution for onychomycosis of the great toenail. Although not representative of all subject outcomes, these findings provide insight into the use of topical tavaborole for dermatophytoma, a condition previously thought to respond only to oral or combination therapy.

J Drugs Dermatol. 2018;17(3):347-354.

Impact of the mechanical hyperkeratotic lesions and its association with quality of life: An observational case-control study.

BACKGROUND: Mechanical hyperkeratotic lesions (MHL) are common condition amongst population of all ages. Such problems may be associated with pain, reduction in mobility, changes of gait and risk of falls and is believed to affect the quality of life (QoL), general health and optimal foot health. OBJECTIVE: The main aim of this study was to describe and compare both foot and general health-related QoL in two groups of participants: (i) with MHL and (ii) healthy controls. METHOD: A total sample of 150 patients, mean age 49.50 ± 36.50 years, was recruited from an outpatient clinic. Demographic data, medical history and clinical characteristics of overall health were determined, and the obtained values were compared by the Foot Health Status Questionnaire (FHSQ). RESULTS: The FHSQ scores of the sample with MHL showed lower scores than control subjects in sections one and two for footwear, general and foot health, foot pain, foot function and physical activity (P < 0.01), but not for social capacity and vigour (P > 0.01). CONCLUSIONS: People with MHL showed a decrease in QoL, based on FHSQ scores, regardless of gender.

Toenail onychomycosis by Trichophyton rubrum and concurrent infestation with Tyrophagus putrescentiae.

A remarkable case of onychomycosis by Trichophyton (T.) rubrum combined with nail infestation by Tyrophagus (T.) putrescentiae in an elderly diabetic farmer is described and discussed. Large numbers of eggs and mites in all development stages were present in nail debris, reflecting active reproduction on site. Treatment with ivermectin 0.1% cream and environmental decontamination cleared the mite infestation, while onychomycosis responded well to oral terbinafine and ciclopirox 8% nail lacquer. Such a combination of onychomycosis and mite infestation of the same nail is an exceptional finding reported only twice in the literature.