Solitary Hard Palate Langerhans Cell Histiocytosis Demonstrated on PET/CT Scan in an Adult.

Langerhans cell histiocytosis (LCH) is rare in adults. Oral and maxillofacial LCH commonly affects the bones of the skull and jaws. Here we report a case of a 57-year-old man with a painless oral mass evaluated by F-FDG PET/CT. PET/CT showed a solitary F-FDG-avid tumor in his left hard palate. LCH was confirmed after surgery. This case reminds us that LCH should be considered in an adult with hypermetabolic hard palate lesion on F-FDG PET/CT.