The spectrum of the clinical presentation of oral cGVHD includes (a) erythema of the oral mucosa and tongue, (b) lichenoid lesions that occur on the buccal mucosa, lips and other areas of the oral cavity, (c) oral ulcerations, (d) mucoceles on the hard palate and occasionally lower labial mucosa, and (e) peri-oral sclerosis that limits mouth-opening.