The limited value of sentinel lymph node biopsy in lentigo maligna melanoma: A nomogram based on the results of 29 years of the nationwide dutch pathology registry (PALGA).

Background: Lentigo maligna melanoma (LMM) predominantly presents in the head and neck of the elderly. The value of sentinel lymph node biopsy (SLNB) for LMM patients remains to be determined, as the reported average yield of positive lymph nodes is less than 10%. In this nationwide cohort study, we wanted to identify LMM patients with an increased risk of SLNB-positivity.

The use of specific antihypertensive medication and skin cancer risk: A systematic review of the literature and meta-analysis.

Background: The use of hydrochlorothiazide has recently been linked to skin cancer in observational studies. This may be explained by its photosensitizing properties, but photosensitivity has also been reported for other antihypertensive drugs. We conducted a systematic review and meta-analysis to compare skin cancer risk among antihypertensive drug classes and individual blood pressure lowering drugs.

Elevating the Standard of Care for Patients with Psoriasis: 'Calls to Action' from Epicensus, a Multistakeholder Pan-European Initiative.

Introduction: Despite advances in treatment options and the management of patients with psoriasis, considerable unmet needs remain. Our objective was to identify ways to elevate the standard of care for patients with psoriasis by combining the perspectives of three important stakeholders: patients, clinicians and payors, and define 'Calls to Action' designed to achieve the identified changes.

Methods: Eight themes relevant to elevating the standard of care were identified from an insights-gathering questionnaire completed by all three stakeholder groups.

A cohort analysis of surgically treated primary head and neck lentigo maligna (melanoma): Prognostic value of melanoma subtype and new insights in the clinical value of guideline adherence.

Background: Knowledge about lentigo maligna (melanoma) (LM/LMM) and its associated prognostic clinicopathological characteristics are limited compared to that of non-LM/LMM subtypes. The current study aimed to determine the clinical relevance of the LM/LMM subtype and its influence on recurrence and survival outcomes.

Methods: All consecutive cases of primary cutaneous head and neck LM/LMM treated by wide local excision over a ten-year period were retrospectively reviewed and compared to non-LM/LMM.

International eDelphi Study to Reach Consensus on the Methotrexate Dosing Regimen in Patients With Psoriasis.

Importance: A clear dosing regimen for methotrexate in psoriasis is lacking, and this might lead to a suboptimal treatment. Because methotrexate is affordable and globally available, a uniform dosing regimen could potentially optimize the treatment of patients with psoriasis worldwide.

Objective: To reach international consensus among psoriasis experts on a uniform dosing regimen for treatment with methotrexate in adult and pediatric patients with psoriasis and identify potential future research topics.

Handheld reflectance confocal microscopy: Personalized and accurate presurgical delineation of lentigo maligna (melanoma).

Background: The surgical treatment of lentigo maligna melanoma is associated with high rates of local recurrence. Handheld reflectance confocal microscopy (HH-RCM) allows for in vivo presurgical detection of subclinical lentigo maligna (melanoma) (LM/LMM).

Methods: A single-center retrospective study from December 2015 to July 2017.

Enhanced topical cutaneous delivery of indocyanine green after various pretreatment regimens: comparison of fractional CO laser, fractional Er:YAG laser, microneedling, and radiofrequency.

Different devices have been used to enhance topical drug delivery. Aim of this study was to compare the efficacy of different skin pretreatment regimens in topical drug delivery. In six ex vivo human abdominal skin samples, test regions were pretreated with fractional CO and Er:YAG laser (both 70 and 300 μm ablation depth, density of 5%), microneedling (500 μm needle length), fractional radiofrequency (ablation depth of ± 80-90 μm), and no pretreatment.

Comparison of Two Different Immunohistochemical Quadruple Staining Approaches to Identify Innate Lymphoid Cells in Formalin-fixed Paraffin-embedded Human Tissue.

Lack of specific markers for innate lymphoid cells (ILCs) limit our knowledge on their spatial organization in situ. We compared two quadruple-color staining protocols for detection of the three principal human ILC subsets in formalin-fixed paraffin-embedded specimens. ILC subset-associated archetypical transcription factors (TFs) T-bet, GATA3, and RORγt were used as positive identifiers in combination with lymphoid lineage markers to exclude non-ILCs.

Author Correction: c-Kit-positive ILC2s exhibit an ILC3-like signature that may contribute to IL-17-mediated pathologies.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

c-Kit-positive ILC2s exhibit an ILC3-like signature that may contribute to IL-17-mediated pathologies.

Here we identify a group 2 innate lymphoid cell (ILC2) subpopulation that can convert into interleukin-17 (IL-17)-producing NKp44 ILC3-like cells. c-Kit and CCR6 define this ILC2 subpopulation that exhibits ILC3 features, including RORγt, enabling the conversion into IL-17-producing cells in response to IL-1β and IL-23. We also report a role for transforming growth factor-β in promoting the conversion of c-Kit ILC2s into RORγt-expressing cells by inducing the upregulation of IL23R, CCR6 and KIT messenger RNA in these cells.

Drug penetration enhancement techniques in ablative fractional laser assisted cutaneous delivery of indocyanine green.

Background And Objectives: Topical drug delivery can be increased by pretreatment of the skin with ablative fractional laser (AFXL). Several physical penetration enhancement techniques have been investigated to further improve AFXL-assisted drug delivery. This study investigated the influence of three of these techniques, namely massage, acoustic pressure wave treatment, and pressure vacuum alterations (PVP) on the distribution of the fluorescent drug indocyanine green (ICG) at different depths in the skin after topical application on AFXL pretreated skin.

Patient reported outcomes for intensified versus conventional NB-UVB treatment in non-segmental vitiligo.

Treatment of non-segmental vitiligo (NSV) remains a challenge. Efficacy of NB-UVB treatment may increase with more frequent use or in combination with topical agents. Currently, data on the most effective treatment regimen lacking.

Parameters in fractional laser assisted delivery of topical anesthetics: Role of laser type and laser settings.

Background And Objectives: Efficacy of topical anesthetics can be enhanced by pretreatment of the skin with ablative fractional lasers. However, little is known about the role of parameters such as laser modality and laser density settings in this technique. Aims of this study were to compare the efficacy of pretreatment with two different ablative fractional laser modalities, a CO laser and an Er:YAG laser, and to assess the role of laser density in ablative fractional laser assisted topical anesthesia.

Research Techniques Made Simple: High-Throughput Sequencing of the T-Cell Receptor.

High-throughput sequencing (HTS) of the T-cell receptor (TCR) is a rapidly advancing technique that allows sensitive and accurate identification and quantification of every distinct T-cell clone present within any biological sample. The relative frequency of each individual clone within the full T-cell repertoire can also be studied. HTS is essential to expand our knowledge on the diversity of the TCR repertoire in homeostasis or under pathologic conditions, as well as to understand the kinetics of antigen-specific T-cell responses that lead to protective immunity (i.

Discovery of skin lymphocytes was a game changer in experimental dermatology.

A substantial part of ongoing research in experimental dermatology focuses on skin T cells-for that reason, we find important to highlight the pioneering work of Jan D. Bos et al. from 1987 (The skin immune system (SIS): Distribution and immunophenotype of lymphocyte subpopulations in normal skin) https://www.

Psoriasiform Eruption and Worsening of Pustulosis Palmoplantaris After Treatment with Two Anti-TNF-α Inhibitors, Followed by Successful Treatment with Ustekinumab.

Introduction: Tumor necrosis factor (TNF)-α inhibitors are widely used for the treatment of inflammatory diseases. One of the side effects of TNF-inhibitors is the development of a psoriatiform eruption, also known as paradoxical psoriasis. In this case report, we describe a patient with this side effect after treatment with adalimumab and etanercept.