Eyelash loss associated with hyperthyroidism. 
To describe a patient with eyelash loss as the presenting feature of hyperthyroidism.  Case report.  A 19-year-old woman presented with right upper eyelid eyelash loss.  Thyroid function studies confirmed hyperthyroidism.  She subsequently lost further eyelashes and a patch of scalp hair.  Once the hyperthyroidism was treated, the eyelashes and scalp hair regrew.  Eyelash loss may be an early sign of the hyperthyroid state.