Shamroth sign

external

• Synonyms

  • Loss of obtuse angle at nail fold

• Causes

  • Fingernail clubbing

• Parents

  • Nail sign

• Description

  • "Individuals without clubbing display a diamond-shaped window at the base of the nail beds when the dorsum of 2 fingers from the opposite hands are opposed. In individuals with digital clubbing
  • the diamond window is obliterated."