Historical Situatedness of Categories' Meanings in Medicine.

Dichotomies in medicine are real, and the boundaries that define them are constantly shifting. Radical antitheses such as healthy versus ill, reconstructive versus aesthetic, or medical dermatology versus cosmetic dermatology can be more clearly understood by considering the cultural context of medicine. This essay examines the latter two antitheses and asks whether medical dermatology should be a category limited to somatic illness. It also examines how the tendency to create and endorse dichotomies distorts the meaning and delivery of surgical procedures as well as reimbursement practices in contemporary medicine.

Proposed global drooping and wrinkles classification and scoring system for aging face with validation and experience on 54 Indian subjects.

BACKGROUND: Aging is an inevitable biological change, but understanding the process of aging of face is important to customize the treatment options for facial rejuvenation. Evidence-based estimation of global facial aging is necessary for the validation of various treatment modalities. AIMS: Classification and implementation of a scoring system for aging face based upon volume loss and surface changes as evident by drooping of different areas of the face and appearance of fine and deep wrinkles, respectively, and to apply this drooping-wrinkles classification on 54 participants to evaluate and understand the validity of scoring. METHODS: An observational study was conducted, and scores were calculated based on 13 parameters (7 areas of drooping and 6 areas of wrinkles on the face) at Aura Skin Institute, Chandigarh, India. Accordingly, age was divided in different age groups followed by clinical estimation of facial age and calculation of scores. RESULTS: According to our classification and scoring system, 61% (33 out of 54) of the participants were correlated with their chronological age group. Out of the remaining 21 (39%) participants who were aging faster, 13 (24%) were in the age group of 25-35 years. Approximately one-fourth of the patients in the age groups 36-45 and 46-55 years were aging faster. Only 1 patient had scores showing younger age in comparison to chronological age. Overall, there was a good correlation between the calculated score and the chronological age of patients. Moreover, a gradual increase in scores was noticed with increasing age groups. CONCLUSIONS: This is a new clinical classification and scoring system for facial age which is much easier to apply in daily clinical practice for easy calculation of baseline scores and customizing their antiaging treatment options. Moreover, it will also make it easier to compare the efficacy of treatment in their future follow-ups. The limitation of this study is that it has been proposed for all skin types but validation has been done only for Indian participants.

Skin Type Classification: A Decennial Perspective.

The intent of this brief communication is to revisit the Roberts Skin Type Classification System published by Journal of Drugs in Dermatology (JDD) in 2008 with a 2018 lens and provide additional information for its wider acceptance and implementation.

Metronidazole thermogel improves retention and decreases permeation through the skin

ABSTRACT Metronidazole (MTZ) is widely used as the standard antibiotic for the treatment of rosacea and, more recently, is being used off label in Brazilian hospitals for the treatment of wounds. Following oral administration, minimal amounts of active agent reaches the skin and side effects are strongly induced. Consequently, MTZ is currently being applied topically in order to improve the therapeutic efficacy with reduced side effects, with Rozex(r) (RZ) (an MTZ gelled formulation) being the only marketed product. This study examined whether the use of MTZ 0.75% from thermogel formulations could improve drug retention and reduce dermal exposure compared to that by Rozex(r). Following a 21 h permeation study, the highest total amount of MTZ permeated through the rat healthy and disturbed skin was seen with Rozex(r), but similar to all formulations regardless of the skin condition. On the other hand, the amount retained in the epidermis/dermis was larger for thermogel formulations; at least 4 fold that of Rozex(r), when the stratum corneum was present as a barrier. In conclusion, thermogel formulations can be favorable alternatives to Rozex(r) for the topical application of MTZ with improved efficacy and reduced side effects.

Guava: phytochemical composition of a potential source of antioxidants for cosmetic and/or dermatological applications

ABSTRACT Guava (Psidium guajava L.) is a native fruit of the American tropics with commercial applications for its taste, flavor and aroma. Numerous pharmacological uses have been described for it, such as the antiseptic effect of its leaves, the use of the fresh fruit and tea from its leaves for the treatment of diarrhea, dysentery, diabetes mellitus, and others. However, considering its rich composition, the guava also is a potential source of antioxidants to be used in the development of new formulations for cosmetic and/or dermatological applications, the main focus of this research. Herein, we describe the study of the phytochemical composition and the antioxidant activity of a guava extract prepared with non-toxic solvents aiming its use at biological applications. High performance liquid chromatography and mass spectrometry were employed to identify the major components, while thermoanalytical measurements and hot stage microscopy were used to assess the chemical stability of guava fruit extract. The antioxidant activity was also evaluated assessing the SOD-like activity and ABTS free radical scavenger. The results show that the extract is a rich source of phenolic compounds, such as quercetin, kaempferol, schottenol, among many others. All of the components found in guava extract exhibit biological effects according to the literature data, mainly antioxidant properties.

Resolución de granuloma anular diseminado con fototerapia UVB de banda estrecha / Successful Treatment of Disseminated Granuloma Annulare With Narrowband UV-B Phototherapy

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SVM-RFE based feature selection and Taguchi parameters optimization for multiclass SVM classifier.

Recently, support vector machine (SVM) has excellent performance on classification and prediction and is widely used on disease diagnosis or medical assistance. However, SVM only functions well on two-group classification problems. This study combines feature selection and SVM recursive feature elimination (SVM-RFE) to investigate the classification accuracy of multiclass problems for Dermatology and Zoo databases. Dermatology dataset contains 33 feature variables, 1 class variable, and 366 testing instances; and the Zoo dataset contains 16 feature variables, 1 class variable, and 101 testing instances. The feature variables in the two datasets were sorted in descending order by explanatory power, and different feature sets were selected by SVM-RFE to explore classification accuracy. Meanwhile, Taguchi method was jointly combined with SVM classifier in order to optimize parameters C and γ to increase classification accuracy for multiclass classification. The experimental results show that the classification accuracy can be more than 95% after SVM-RFE feature selection and Taguchi parameter optimization for Dermatology and Zoo databases.

Misnomers in dermatology: time to change and update.

Most of the misnomers encountered in dermatology have arisen from lack of understanding of the underlying etiopathogenesis, histopathology and/or concepts. Some misnomers are due to imprecise translations from word of origin, etymological bungles and/or factual errors. It is very important for the residents and practitioners of dermatology to update and change the old misnomers with relevant names to avoid confusion and misunderstanding. In this article, we have listed all the misnomers in dermatology and suggested the appropriate names as indicated.

[Should all dermatologists still be considered 'dermato-venereologists' in the year 2013?]. / Dermatoloog anno 2013 nog altijd dermato-venereoloog?

This commentary primarily focuses on the appropriateness of the predicate 'venereologist' for dermatologists in the Netherlands. If the quantity of care delivered were to be the most important factor needed for the qualification 'venereologist', the answer to the title question would undoubtedly be 'no' because more than 70% of sexually transmitted disease (STD) care is delivered in primary care centres. After the reorganisation of STD care in the Netherlands in 2006, 8 coordinating municipal STD centres were allocated for the primary care of pre-defined risk groups. By utilizing multidisciplinary guidelines, the Dutch Society of Dermatologists and Venereologists plays an important coordinating and supervisory role in current primary and in-hospital STD care.

[Parapsoriasis--to be or not be (mycosis fungoides)].

Mycosis fungoides (MF) is the most prevalent cutaneous lymphoma, characterized by uncontrolled growth of T cells within the skin. The diagnosis in the early stages may be difficult, since, in these stages, the disease can imitate benign inflammatory processes, both clinically and histologically. One of the difficulties in determining diagnostic criteria for early MF is the existing terminology of parapsoriasis. There is disagreement concerning the exact definition and whether it is a chronic benign condition with similar clinical and histological characteristics as MF, or rather it is part of the disease spectrum itself. There is a need for uniformity in the definition for treatment decisions, for epidemiological purposes and for clinical and experimental research. This article reviews the different approaches to parapsoriasis as part of MF over the years.

Bibliometrics, dermatology and contact dermatitis.

Although the fields of bibliometrics and citation analysis have existed for many years, relatively few studies have specifically focused on the dermatological literature. This article reviews citation-based research in the dermatology journals, with a particular interest in manuscripts that have included Contact Dermatitis as part of their analysis. Overall, it can be seen that the rise of bibliometrics during the mid-20th century and its subsequent application to dermatology has provided an interesting insight into the progression of research within our discipline. Further investigation of citation trends and top-cited papers in skin research periodicals would certainly help complement the current body of knowledge.