Fluorrine-18-fluorodeoxyglucose positron emission tomography/computed tomography of adult liver Langerhans cell histiocytosis.

OBJECTIVE: Adult liver Langerhans cell histiocytosis (LCH) is an extremely rare desease. This paper reports a 40 years old male patient who was diagnosed as liver LCH though ultrasound-guided liver biopsy. The initial Fluorrine-18- fluorodeoxyglucose positron emission tomography/ computed tomography (18F-FDG PET/CT) showed multiple nodular low-density lesions in liver without obvious elevated 18F-FDG uptake. Four years later, the follow-up 18F-FDG PET/CT showed the liver multiple lesions with slightly elevated 18F-FDG uptake. CONCLUSION: We describe this case, to highlight the importance of 18F-FDG PET/CT in differential diagnosis for the primary disease and the multiple liver nodules.