<unk>  is a chronic raised indurated (hardened) lesion of the skin, often purplish in color. It is seen on the nose, ears, cheeks, lips, and forehead. It is pathognomonic of sarcoidosis. The name<unk> " is a misnomer, as microscopically this disease shows granulomatous infiltration and does not have features of either<unk>  or<unk> .<unk>  is associated with poor outcomes and lower rates of resolution.<unk>  and erythema nodosum are cutaneous manifestation of sarcoidosis, may suggest this disease as a cause of an associated dilated cardiomyopathy, especially with heart block, intraventricular conduction delay, or ventricular tachycardia.
Lupus pernio
Vitiligo ponctué
Porphyria cutanea tarda
Vitiligo
Vogt–Koyanagi–Harada disease
Phakomatosis pigmentovascularis
Arcus senilis
Gestational pemphigoid