狼疮：蝴蝶斑(颊疹)

图示典型颊疹，狼疮比其它自身免疫性疾病的颊疹更为典型,但不是最特异的。

Here is a more subtle malar rash. Such a rash is more typical for lupus than other autoimmune diseasease, but is not entirely specific for it.