A 57-year-old woman with Crow-Fukase syndrome presented thiamine defic
iency and pulmonary hypertension of unknown etiology, After oral admin
istration of prednisolone and thiamine, echocardiogram showed marked i
mprovement of the pulmonary hypertension, To our knowledge, this is th
e first case of this syndrome associated with thiamine deficiency and
precapillary pulmonary hypertension, which may play a role in the path
ogenesis of polyneuropathy and heart failure of this syndrome.