TY - CHAP M1 - Book, Section TI - Clinical Stages of Syphilis A1 - Philip, Susan S. A2 - Papadakis, Maxine A. A2 - McPhee, Stephen J. A2 - Rabow, Michael W. A2 - McQuaid, Kenneth R. Y1 - 2023 N1 - T2 - Current Medical Diagnosis & Treatment 2023 AB - ESSENTIALS OF DIAGNOSISPainless ulcer on genitalia, perianal area, rectum, pharynx, tongue, lip, or elsewhere.Fluid expressed from ulcer contains T pallidum by immunofluorescence or darkfield microscopy.Nontender enlargement of regional lymph nodes.Serologic nontreponemal and treponemal tests may be positive. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/10/14 UR - accessmedicine.mhmedical.com/content.aspx?aid=1193137189 ER -