Fig. 3

Axial T1-weighted image (a) demonstrated a big LCH lesion with isointensity. It shows heterogeneous on T2 fat-saturation MR image for intratumoral hemorrhage (arrow in b).On enhanced MR image, it shows heterogenous and avid enhancement (c). Hematoxylin–eosin staining (× 400) (d) of LCH demonstrates Langerhans cell mixed with eosinophils and multi-nucleated giant cells. Immunohistochemical (× 400) (e) demonstrates positive staining for CD1a of the same LCH sample