Borsari's sign

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Borsari's sign
Differential diagnosisScarlet fever

Borsieri's sign or Borsieri's line is a dermatological sign that consists of pressure by a sharp object (such as a fingernail) producing a white line on the skin that quickly turns red. It is present in scarlet fever.[1][2] It was first described by French physician Giovanni Battista Borsieri [it].[2]


  1. Patel LM, Lambert PJ, Gagna CE, Maghari A, Lambert WC (2011). "Cutaneous signs of systemic disease". Clin. Dermatol. 29 (5): 511–22. doi:10.1016/j.clindermatol.2011.01.019. PMID 21855727.
  2. 2.0 2.1 Physical signs in medicine and surgery : an atlas of rare, lost and forgotten physical signs : includes a collection of extraordinary papers in medicine, surgery and the scientific method. White, Fred Ashley. [Ocala, FL]: Museum Press. 2009. ISBN 9781441508287. OCLC 427059573.{{cite book}}: CS1 maint: others (link)