Dr. M.D. Njoo achieved his medical degree at the Rijksuniversiteit in Groningen in 1995. Subsequently, he worked 8 months as a senior house officer at the Department of Dermatology, University Hospital Dijkzigt, Rotterdam. Betweeen november 1995 and october 1999 he worked as a senior house officer at the Netherlands Institute for Pigmentary Disorders, in Amsterdam where he has developed a great affinity towards the treatment of pigmentary skin problems. In 2000 he achieved his PhD degree on the theses “Treatment of vitiligo ” at the University of Amsterdam. In 2004 he finished his training as a dermatologist. Since 1 april 2004 dr. M.D. Njoo is working as a dermatologist at the Department of Dermatology of the Ziekenhuisgroep Twente, location Hengelo (Ov.), the Netherlands. Dr. M.D. Njoo has published more than 50 scientific papers in both national and international journals. Furthermore he is medical editor of the popular website www.huidarts.com and chief editor of the medical journal Kompakt Dermatology. His favourite topics in dermatology are oncology, flebology, psoriasis, pigment disorders and photo- and lasertherapy. Dr Njoo is also an expert in minimal invasive procedures of facial aesthetic dermatology (www.davidnjoo.nl). The main goal in his profession is to achieve optimal patient satisfaction using innovative dermatological treatment and patient care technologies.