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- Dahl's_sign abstract "Dahl's sign (also Thinker's sign or Target sign) is a clinical sign in which areas of hyperpigmentation are seen on the skin of the lower thighs and elbows. It occurs in patients with longstanding severe chronic obstructive pulmonary disease.The sign occurs because patients with COPD tend to sit forwards with their arms resting on their thighs, leading to chronic erythema of the skin at the points of contact. Over time, haemosiderin released from red blood cells trapped in the skin is released causing a brown discolouration of the skin.Air trapping in the lungs of COPD patients causes the diaphragm to be pushed down and flattened, which reduces the effect of contraction of the diaphragm during inspiration. Sitting forwards pushes the abdominal contents upwards, increasing the curvature of the diaphragm and improving its effectiveness.Bilateral cubital tunnel syndrome may also be found in patients with Dahl's sign.Dahl's sign was described by K.V. Dahl in 1970.".
- Dahl's_sign wikiPageID "22169024".
- Dahl's_sign wikiPageRevisionID "545610017".
- Dahl's_sign hasPhotoCollection Dahl's_sign.
- Dahl's_sign subject Category:Medical_signs.
- Dahl's_sign type Abstraction100002137.
- Dahl's_sign type Clue106643763.
- Dahl's_sign type Communication100033020.
- Dahl's_sign type Evidence106643408.
- Dahl's_sign type Indication106797169.
- Dahl's_sign type MedicalSigns.
- Dahl's_sign type Sign106646243.
- Dahl's_sign comment "Dahl's sign (also Thinker's sign or Target sign) is a clinical sign in which areas of hyperpigmentation are seen on the skin of the lower thighs and elbows. It occurs in patients with longstanding severe chronic obstructive pulmonary disease.The sign occurs because patients with COPD tend to sit forwards with their arms resting on their thighs, leading to chronic erythema of the skin at the points of contact.".
- Dahl's_sign label "Dahl's sign".
- Dahl's_sign label "علامة داهل".
- Dahl's_sign sameAs m.05q969m.
- Dahl's_sign sameAs Q5208858.
- Dahl's_sign sameAs Q5208858.
- Dahl's_sign sameAs Dahl's_sign.
- Dahl's_sign wasDerivedFrom Dahl's_sign?oldid=545610017.
- Dahl's_sign isPrimaryTopicOf Dahl's_sign.