精制蛋白衍化物（PPD）皮试显示：良性病变强阳性反应占42％，恶性病变阴性反应占48％。
PPD test showed that intense positive reaction was 42% in the benign cases, but negative response was 48% in the malignant cases.
精制蛋白衍化物（PPD）皮试显示：良性病变强阳性反应占42％，恶性病变阴性反应占48％。
PPD test showed that intense positive reaction was 42% in the benign cases, but negative response was 48% in the malignant cases.
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