Buphthalmos in neurofibromatosis: is it an expression of regional giantism?

A case of buphthalmos and regional giantism in neurofibromatosis with the characteristics of the Francois syndrome is reported. Difficulties of early diagnosis are emphasized. A discussion of the mechanisms which may produce buphthalmos in neurofibromatosis is presented. We propose that buphthalmos in neurofibromatosis may be primarily an expression of regional giantism rather than a consequence of uncontrolled intraocular pressure.