TY - CHAP M1 - Book, Section TI - Cyanosis A1 - Kasper, Dennis L. A1 - Fauci, Anthony S. A1 - Hauser, Stephen L. A1 - Longo, Dan L. A1 - Jameson, J. Larry A1 - Loscalzo, Joseph PY - 2016 T2 - Harrison's Manual of Medicine, 19e AB - Bluish discoloration of the skin and/or mucous membranes are usually due to elevated quantity of reduced hemoglobin (>40 g/L [>4 g/dL]) in the capillary blood vessels. Findings are most apparent in the lips, nail beds, ears, and malar eminences. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/29 UR - accessmedicine.mhmedical.com/content.aspx?aid=1128782364 ER -