DISCOVERING A DYS-COVERING LID

A patient with a large pituitary adenoma presenting with signs of prim ary aberrant regeneration of the left oculomotor nerve is reported. Th e proposed pathophysiological mechanisms involved in this syndrome are discussed and the known lesions causing it are listed. The various pr esentations of a pituitary adenoma, common and less common, are review ed. Although neuroimaging is readily available, predicting the site of the lesion based on a meticulous clinical examination remains a chall enge for ophthalmologists. (C) 1997 by Elsevier Science Inc. All right s reserved.