Thinker's sign.

  title={Thinker's sign.},
  author={Sandeep M. Patel and Jay H Ryu and Hiroshi Sekiguchi},
  journal={Internal medicine},
  volume={50 22},
A 65-year-old man was admitted for a COPD exacerbation. Physical examination was notable for a dyspneic, barrel-chested, Caucasian man leaning forward on a table (Picture 1). Lung auscultation revealed bilateral wheezes with a prolonged expiratory phase. Dermatologic examination demonstrated hyperpigmentation and hyperkeratosis of both elbows that was non-tender and cool to palpation (Picture 2). Thinker’s sign [also known as Dahl’s sign (1)] was first described in a patient with severe COPD in… CONTINUE READING