RT Book, Section A1 Burgin, Susan SR Print(0) ID 1175057973 T1 Color as a Diagnostic Determinant T2 Guidebook to Dermatologic Diagnosis YR 2021 FD 2021 PB McGraw-Hill Education PP New York, NY SN 9780071738750 LK accessmedicine.mhmedical.com/content.aspx?aid=1175057973 RD 2024/03/28 AB As we have seen, the characteristics of primary lesions, and sometimes, secondary lesions as well, can be used to create, or narrow, differential diagnoses. This chapter focuses on color as a diagnostic determinant. Color is a powerful tool that can be harnessed to create differential diagnoses. Pink, red, brown, and white are the most common colors of primary and secondary lesions that are manifest in the skin. But the skin may house other colors as well, including yellow, orange, purple, maroon, gray, blue, green, and black. In this chapter, comprehensive differential diagnoses will be discussed for each color using the wheel of diagnosis. Additionally, the causes of generalized color changes will be outlined. While tattoo artists may introduce any of these colors into the skin, this chapter will focus only on those color changes that are endogenously produced or acquired through disease states.