<unk>  is a type of erythema (redness of the skin or mucous membranes) involving pink rings on the torso and inner surfaces of the limbs which come and go for as long as several months. It is found primarily on extensor surfaces. An association with bradykinin has been proposed in the case of hereditary angioedema.
Erythema marginatum
Granulomatous slack skin
Pachyderma
Hypodermyasis
Nodular lichen myxedematosus
Ichthyosis linearis circumflexa
Hypertrichosis cubiti
Erythema induratum