A<unk>  (from Latin ‘jaw, cheek-bone’), also called butterfly<unk> , is a medical sign consisting of a characteristic form of facial<unk> . It is often seen in lupus erythematosus. More rarely, it is also seen in other diseases, such as pellagra, dermatomyositis, and Bloom syndrome. A<unk>  of lupus is red or purplish and mildly scaly. It has the shape of a butterfly, and involves the bridge of the nose. Notably, the<unk>  spares the nasolabial folds of the face, which contributes to its characteristic appearance. It is usually macular with sharp edges, and not itchy. There are may conditions which can cause<unk> es with a similar appearance to a<unk> . A<unk>  is present in approximately 46–65% of people with lupus.
Malar rash
Road rash
Onycholysis
Broken finger
Leukoedema
Petechia
Maculopapular rash
Palmar erythema