醫學二：100題 ( 包括生理學,生化學,藥理學,病理學等科目及其臨床相關知識 )題庫下載題庫

Spider angioma/spider telangiectasia: If you press down on this, the little tentacles will go away (therefore it blanches)–called spider angioma.   It is due to hyperestrinism.   This is normal in pregnancy.  If a male has spider angioma, he has cirrhosis (MCC cirrhosis = alcohol).  Why would a male have a spider angioma? B/c if you have cirrhosis, you cannot metabolize estrogen – so it builds up, leading to gynecomastia, warm skin, palmer erythema, and spider angioma related to hyperestrinism. Another reason would be b/c they  cannot metabolize 17 ketosteroids  either, therefore they ...

Spider angioma/spider telangiectasia: If you press down on this, the little tentacles will go away (therefore it blanches)–called spider angioma.   It is due to hyperestrinism.   This is normal in pregnancy.  If a male has spider angioma, he has cirrhosis (MCC cirrhosis = alcohol).  Why would a male have a spider angioma? B/c if you have cirrhosis, you cannot metabolize estrogen – so it builds up, leading to gynecomastia, warm skin, palmer erythema, and spider angioma related to hyperestrinism. Another reason would be b/c they  cannot metabolize 17 ketosteroids  either, therefore they will be aromatized those in the adipose tissue into estrogen. So, they are 2 ways of getting hyperestrinism in cirrhosis.  So, how is this different from petechia? It looks diff; also, it will blanch when you press it in b/c it’s an AV fistula – in other words, the blood goes directly from arteriole to a venule and is bypassing the capillaries.