22.下列何者為神經纖維瘤症（neurofibromatosis）最典型的皮膚特徵？
(A)linear hypopigmentation
(B)cherry red spots
(C)port-wine stain
(D)café-au-lait spots

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統計： A(3), B(2), C(4), D(171), E(0) #1623565