Fig. 28
![Fig. 28](http://media.springernature.com/full/springer-static/image/art%3A10.1007%2Fs13244-015-0401-5/MediaObjects/13244_2015_401_Fig28_HTML.gif)
Langerhans cell histiocytosis in a 6-year-old girl with headaches and diabetes insipidus. Coronal T1WI shows a lesion involving the upper pituitary gland and stalk which has intermediate signal (a). The lesion shows prominent enhancement on post-contrast coronal T1WI (b)