to clarify salient issues pertaining to histiocytosis x -- a syndrome that includes letterer-siwe disease , hand-schuller-christian disease , and eosinophilic granuloma -- the authors review the epidemiologic data and the histologic , morphologic , and clinical bases for diagnosis and prognosis .
C0019621
hand-schuller-christian disease
C0014461
eosinophilic granuloma