9. 當腫瘤之病理組織(pathology)檢查結果,呈現單調式的,小型圓形藍色細胞(monotonous, small, round, blue cells)時,應將下列的可能性列入主要的"鑑別診斷",何者除外?
(A) 小細胞上皮癌 (small-cell carcinoma)
(B) 惡性淋巴瘤 (lymphoma)
(C) Ewing 氏惡性肉瘤 (Ewing's sarcoma)
(D) 惡性胃腸間質瘤 (GISTs, gastrointestinal stromal tumors)
(E) 胚胎橫紋肌肉瘤 (embryonal rhabdomyosarcoma)