Langerhans cell histiocytosis
Proliferative disorder of monocytes
Variants include:
Hand-Schuller-Christian disease
-Skull lesions
-Exophthalmos
-Diabetes insipidus
-Mostly in patients older than 2
Letterer-Siwe syndrome
-Hepatosplenomegaly
-Anemia/hemorrhage
-Patients usually under 2
Histiocytosis X
-solitary eosinophilic granuloma
-bone lesions
-older children (over 2)
-may be observed if asymptomatic
-RT given for lesions recurrent after surgery or refractory to steroids/chemo
-10Gy gives good local control, over 80%
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