circumscribed myxedema

cir·cum·scribed myx·e·de·ma

(sĭr'kŭm-skrībd mik'sĕ-dē'mă) Nodules and plaques of mucoid edema of the skin, usually in the pretibial region, occurring in some patients with hyperthyroidism.
Synonym(s): pretibial myxedema.