Japanese Dermatological Association Guidelines: Outlines of Guidelines for Cutaneous Squamous Cell Carcinoma 2020

In consideration of the development treatment options for squamous cell carcinoma (SCC), Japanese Skin Cancer Society issued first guidelines SCC in 2007 and revised them 2015. Here, we report English version 2020 edition guidelines. The half this article is an overview including actinic keratosis Bowen’s disease, second discusses three clinical questions: (i) keratosis; (ii) determination resection margin primary lesion; (iii) radically incurable cases, as contemporary problems encountered treating SCC. these evaluations, all processes were implemented according to Grading Recommendations, Assessment, Development, Evaluation system. Also, items recommendation concerning each question determined by a multidisciplinary expert panel consisting dermatologists, plastic/reconstructive surgeons, radiologists, oncologists through comprehensive literature search systematic reviews.