Engin Şenel1, Yasemin Yuyucu Karabulut2. 1. Hitit University Faculty of Medicine, Department of Dermatology, Çorum, Turkey. 2. Mersin University Faculty of Medicine, Department of Pathology, Mersin, Turkey.
Below is the answer to the quiz by Dr. Şenel et al presented in the previous issue of Dermatology Practical & Conceptual [2014;4(4):13].Diagnosis: Kaposi sarcoma.Kaposi sarcoma (KS) was first described by Kaposi in 1872. There are four clinical types of the disease: classic, endemic, epidemic and iatrogenic [1]. Iatrogenic KS develops in patients taking immunosuppressive treatment. Bluish-reddish coloration is seen in 84% of KS lesions in dermatoscopy. Rainbow pattern and scaly surface are other dermatoscopic features of KS (36% and 15%, respectively) [2]. Multicolored rainbow pattern is the most diagnostic appearance of KS in dermatoscopic evaluation and is associated with vascular lumen-rich histological sub-type [3]. This pattern can be rarely seen in the dermatoscopy of melanoma [4].Congratulations to Dr. Arina Vashkevich (aavashk@mail.ru), who was the first to send us the correct answer!