Other names: mallet toes, pachyakrie
Like clubbing refers to the extension of the last of the phalanges of the hands and feet, nail them is spherical, its shape is described as an hour-glass shaped.
Probably arise due to the opening of vascular coupling between arterial and venous system.
Clubbing may occur due to circulatory insufficiency, for example with congenital heart defects orwith chronic lung diseases. Disease must be longer, so that this flag could develop.
Clubbing also occur in people with liver disease, but also may arouse suspicion of cancer. Some tumors is released into the circulation of the various secretions and can cause changes even at remote locations (ie. Paraneoplastic syndromes).
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