Noncutaneous LE is a chronic inflammatory disease of connective tissue. This autoimmune condition is sometimes exacerbated after exposure to sunlight. The discoid form causes well-defined lesions. These scaly patches are found on the head and neck. The subacute form causes papulosquamous or polycyclic lesions around the neck, the outer aspects of the arms, and the trunk.
Papulosquamous lesions are red elevated areas.
Polycyclic lesions show up as patches of many, rounded lesions. The lesions caused by the subacute form of lupus erythematosus are milder than in the discoid form. The lesions of the subacute form also heal without scaring or atrophy. However, in some individuals, UVA plays a greater role. People who suffer from LE should use a broad-spectrum sunblock and avoid exposure to the sun.