JAAD InternationalPub Date : 2026-02-01Epub Date: 2025-10-28DOI: 10.1016/j.jdin.2025.10.008
Chang Chuen Tan , Krystal Valerie Soh , Eugene Wang , Ellie Ci-En Choi MBBS, MMed, MRCP, MCI
{"title":"The brain-skin connection: A narrative review of neuroendocrine and immune pathways","authors":"Chang Chuen Tan , Krystal Valerie Soh , Eugene Wang , Ellie Ci-En Choi MBBS, MMed, MRCP, MCI","doi":"10.1016/j.jdin.2025.10.008","DOIUrl":"10.1016/j.jdin.2025.10.008","url":null,"abstract":"<div><h3>Background</h3><div>Stress is a well-established trigger for many skin diseases; yet its biological mechanisms are poorly understood.</div></div><div><h3>Objective</h3><div>To synthesize current evidence on brain-skin pathways, emphasizing key mediators and feedback loops that explain how stress exacerbates skin disease and vice versa.</div></div><div><h3>Methods</h3><div>A comprehensive search through August 25, 2025, using terms related to brain-skin communication, psychodermatology, and stress-related pathophysiology included both in-vivo and in-vitro animal and human studies.</div></div><div><h3>Results</h3><div>159 articles were included and synthesized. Key findings highlight a bidirectional brain-skin axis involving the brain and pituitary, adrenal glands, peripheral nerves and skin. Stress triggers the brain and pituitary to release corticotropin-releasing hormone and adrenocorticotropic hormone; adrenal glands to secrete cortisol, catecholamines and androgens; and peripheral nerves to release neuropeptides such as Substance P and calcitonin gene-related peptide. These are implicated in skin inflammation while skin-derived mediators (cytokines, chemokines, neurotrophins) may disrupt and cross the blood-brain barrier, amplifying neuroinflammation, and psychiatric symptoms. Together, these form a self-sustaining feedback perpetuating both dermatologic and psychological disease.</div></div><div><h3>Limitations</h3><div>Much of the mechanistic understanding is derived from animal models; high-quality human data remain limited.</div></div><div><h3>Conclusion</h3><div>Understanding the brain-skin axis identifies therapeutic targets and guides future research on stress-related skin disease.</div></div>","PeriodicalId":34410,"journal":{"name":"JAAD International","volume":"24 ","pages":"Pages 112-123"},"PeriodicalIF":5.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
JAAD InternationalPub Date : 2026-02-01Epub Date: 2025-11-27DOI: 10.1016/j.jdin.2025.11.016
Alexander R. Gomez-Lara BA, BS , Adam Zakaria MD, MAS , Maria Elena Sanchez-Anguiano BS , Erin H. Amerson MD
{"title":"Rosacea prevalence, severity, and phenotype by race, ethnicity, and gender: A cross-sectional study of a diverse patient cohort within a primary care population","authors":"Alexander R. Gomez-Lara BA, BS , Adam Zakaria MD, MAS , Maria Elena Sanchez-Anguiano BS , Erin H. Amerson MD","doi":"10.1016/j.jdin.2025.11.016","DOIUrl":"10.1016/j.jdin.2025.11.016","url":null,"abstract":"","PeriodicalId":34410,"journal":{"name":"JAAD International","volume":"24 ","pages":"Pages 338-341"},"PeriodicalIF":5.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
JAAD InternationalPub Date : 2026-02-01Epub Date: 2025-11-03DOI: 10.1016/j.jdin.2025.10.015
Benjamin D. Hu BS , Brandon R. Block BA , Grace Rabinowitz BA , Raphaella Lambert BA , Andrew Zhu MSc , Hannah Verma BA , Jón Gunnlaugur Jónasson MD , Bardur Sigurgeirsson MD, PhD , Shane Meehan MD , Jonathan Ungar MD , Jesse M. Lewin MD , Nicholas Gulati MD, PhD , Jonas A. Adalsteinsson MD, PhD
{"title":"Relative survival analysis of Merkel cell carcinoma across intersectional demographics using the Surveillance, Epidemiology, and End Results (SEER) database","authors":"Benjamin D. Hu BS , Brandon R. Block BA , Grace Rabinowitz BA , Raphaella Lambert BA , Andrew Zhu MSc , Hannah Verma BA , Jón Gunnlaugur Jónasson MD , Bardur Sigurgeirsson MD, PhD , Shane Meehan MD , Jonathan Ungar MD , Jesse M. Lewin MD , Nicholas Gulati MD, PhD , Jonas A. Adalsteinsson MD, PhD","doi":"10.1016/j.jdin.2025.10.015","DOIUrl":"10.1016/j.jdin.2025.10.015","url":null,"abstract":"","PeriodicalId":34410,"journal":{"name":"JAAD International","volume":"24 ","pages":"Pages 126-128"},"PeriodicalIF":5.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145615323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Supporting evidence and recommendations for the management of patients with systemic-eligible atopic dermatitis: A Canadian consensus document","authors":"Kerri Purdy MD , Melinda Gooderham MD , Mohannad Abu-Hilal MD , April Armstrong MD , Rachel Asiniwasis MD , Gurbir Dhadwal MD , Carolyn Jack MD , Perla Lansang MD , Fiona Lovegrove MD , Julien Ringuet MD , Shanna Spring MD","doi":"10.1016/j.jdin.2025.06.009","DOIUrl":"10.1016/j.jdin.2025.06.009","url":null,"abstract":"<div><h3>Background</h3><div>Atopic dermatitis is a chronic, relapsing, and remitting inflammatory skin disease. Multiple systemic therapeutic options are available to treat atopic dermatitis.</div></div><div><h3>Objective</h3><div>To provide evidence-based recommendations on the use of systemic therapies for atopic dermatitis in Canada that consider the nuances of the Canadian healthcare system and provide guidance for populations of clinical interest.</div></div><div><h3>Methods</h3><div>A panel of 14 experts, including 11 dermatologists from Canada and 3 from the United States, reviewed available literature on systemic therapies for atopic dermatitis. The published evidence, along with clinical expertise and opinion, was used to draft a concise set of statements to guide healthcare providers in Canada on systemic treatment of atopic dermatitis.</div></div><div><h3>Results</h3><div>During 3 rounds of virtual meetings with all 14 experts voting in all meetings, a total of 29 statements reached the 75% agreement required for consensus.</div></div><div><h3>Limitations</h3><div>The consensus statements are based on expert opinions and consensus in the absence of evidence-based clinical research for patient outcomes. The statements represent considerations for patient management and not specific guidelines for patient treatment.</div></div><div><h3>Conclusion</h3><div>The recommendations and statements provided serve to guide Canadian healthcare providers on the practical aspects of managing systemic-eligible patients with atopic dermatitis.</div></div>","PeriodicalId":34410,"journal":{"name":"JAAD International","volume":"24 ","pages":"Pages 31-49"},"PeriodicalIF":5.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145398514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
JAAD InternationalPub Date : 2026-02-01Epub Date: 2025-12-04DOI: 10.1016/j.jdin.2025.11.020
Alyssa M. Roberts BS , Charlotte Jeong BS , Peichi Chou BA , Elaine J. Ma BA , Abigail Katz BA , Matthew J. Yan BS, BA , Nicole Johnsen BS , Yvonne Nong MD , April W. Armstrong MD, MPH
{"title":"Association between out-of-pocket costs and treatment patterns in psoriasis and psoriatic arthritis: A claims-based cohort study","authors":"Alyssa M. Roberts BS , Charlotte Jeong BS , Peichi Chou BA , Elaine J. Ma BA , Abigail Katz BA , Matthew J. Yan BS, BA , Nicole Johnsen BS , Yvonne Nong MD , April W. Armstrong MD, MPH","doi":"10.1016/j.jdin.2025.11.020","DOIUrl":"10.1016/j.jdin.2025.11.020","url":null,"abstract":"","PeriodicalId":34410,"journal":{"name":"JAAD International","volume":"24 ","pages":"Pages 332-334"},"PeriodicalIF":5.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145920638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
JAAD InternationalPub Date : 2026-02-01Epub Date: 2025-11-21DOI: 10.1016/j.jdin.2025.11.009
Jinjin Zhu MD , Chunhui Xie PhD , Yan Li MD , Xue Wang MD , Ziqiong Cheng MD , Yunqi Li PhD , Juan Tao MD, PhD
{"title":"Predicting outcomes of port-wine stains treated with hematoporphyrin monomethyl ether photodynamic therapy (HMME-PDT): An observational study using multimodal deep learning","authors":"Jinjin Zhu MD , Chunhui Xie PhD , Yan Li MD , Xue Wang MD , Ziqiong Cheng MD , Yunqi Li PhD , Juan Tao MD, PhD","doi":"10.1016/j.jdin.2025.11.009","DOIUrl":"10.1016/j.jdin.2025.11.009","url":null,"abstract":"","PeriodicalId":34410,"journal":{"name":"JAAD International","volume":"24 ","pages":"Pages 320-322"},"PeriodicalIF":5.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
JAAD InternationalPub Date : 2026-02-01Epub Date: 2025-12-17DOI: 10.1016/j.jdin.2025.11.027
Dezhao Bi MMed , Songmao Hua MMed , Yunyao Hu MMed , Jinrui Zhang MMed , Haolong Ran MMed , Lei Han MMed , Jin Tong Tey MMed , Shun Guo MD
{"title":"Global, regional, and national burden of alopecia areata from 1990 to 2021: An analysis from the Global Burden of Disease Study 2021","authors":"Dezhao Bi MMed , Songmao Hua MMed , Yunyao Hu MMed , Jinrui Zhang MMed , Haolong Ran MMed , Lei Han MMed , Jin Tong Tey MMed , Shun Guo MD","doi":"10.1016/j.jdin.2025.11.027","DOIUrl":"10.1016/j.jdin.2025.11.027","url":null,"abstract":"","PeriodicalId":34410,"journal":{"name":"JAAD International","volume":"24 ","pages":"Pages 326-328"},"PeriodicalIF":5.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}