試題詳解

50.成人健檢時發現血小板高達1500×10⁹ /L，腹部超音波顯示脾臟腫大。醫師懷疑是真性血小板增多症（essential thrombocythemia），下列何種基因異常較不常見？
(A)JAK2 (Janus-associated kinase 2) gene mutation
(B)MPL (thrombopoietin receptor) gene mutation
(C)PDGFRA (platelet-derived growth factor receptor A) gene mutation
(D)CALR (calreticulin) gene mutation