Fig. 1
From: Rosai-Dorfman-Destombes (RDD) disease presenting as palindromic rheumatism
Contrast-enhanced maxillofacial MRI demonstrates left ethmoid sinus lesion. a Enhancing infiltrative lesion in the left anterior ethmoidal sinus in the Gadolinium-enhanced sequence (White arrow). b This lesion is hypointense in the T2-weighted sequence. c, d The lesion is hypointense in the apparent diffusion coefficient (ADC) sequence and mildly hyperintense in the diffusion-weighted imaging (DWI) sequence, likely due to hypercellularity