6. 低劑量胸腔CT掃描發現單一肺結節(solitary pulmonary nodule)，下列何者為真?
(A) About 70% of incidentally found pulmonary nodules are benign.
(B) A lobulated and irregular contour is more indicative of malignancy than a smooth one.
(C) Ground-glass nodules should be benign.
(D) Multiple nodules indicate malignant disease.
(E) Absence of growth over a period of 6-12 months is sufficient to determine whether it is benign.

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統計： A(6), B(43), C(2), D(1), E(0) #1522060