Lichen planus (skin, oral or genital): hepatitis C and lipid profile

Laboratory tests

• Hepatitis C serology (if never screened)
• Wording to put on the request: "perform HCV RNA as a matter of course if anti-HCV antibodies are positive".
• Hepatitis B serology (HBsAg, anti-HBc, anti-HBs)if neededThe association between lichen planus and hepatitis B remains uncertain ^[2]. Combined HBV, HCV and HIV screening is recommended by AFEF ^[3].
• HIV serology (combined screening, if never done)if neededThe association between lichen planus and hepatitis B remains uncertain ^[2]. Combined HBV, HCV and HIV screening is recommended by AFEF ^[3].
• Lipid profile (if not done recently)
• TSH (if clinical signs of thyroid dysfunction)if needednon-French guidelineThyroid diseases are more frequent in oral lichen planus ^[1]; European recommendations do not ask for routine thyroid tests ^[1].
• ASTif needednon-French guidelineThe American Family Physician (2011) has HCV risk factors looked for and asks for anti-HCV antibodies and liver enzymes in every patient with lichen planus ^[4]. The European recommendation does not provide for this test ^[1], and the French sources cited do not ask for it ^[3,5].
• ALTif needednon-French guidelineThe American Family Physician (2011) has HCV risk factors looked for and asks for anti-HCV antibodies and liver enzymes in every patient with lichen planus ^[4]. The European recommendation does not provide for this test ^[1], and the French sources cited do not ask for it ^[3,5].