The results of this study demonstrated that FDG-PET is a useful technique for the assessment of MM and the correlation between SUVmax and plasma cell ratios in bone marrow biopsy may avoid repeated bone marrow biopsies in the follow-up period.

Our study suggests that PET-CT may be an effective tool for the differentiation of benign and malignant pleural diseases. We believe that PET/CT may prevent redundant surgical procedures in young patients who are SUVmax negative.

The involvement of breast tissue with Hodgkin's lymphoma (HL) has been reported in very few cases up to date. We report a 33-year-old woman who had been treated and followed up with nodular sclerosing HL for 7 years, and admitted with recurrent disease. The fluorine-18 fluorodeoxyglucose positron emission tomography (FDG PET) images revealed disseminated disease with the involvement of bilateral breast tissues showing FDG uptake. In this case, the breast involvement of HL was confirmed by histopathological results.

Vasculitis is defined as inflammation and necrosis with leukocytic infiltration of the blood vessel wall. Takayasu arteritis is a chronic inflammatory arteritis that primarily involves the aorta and its main branches. A 64-year-old female patient with a 2-month history of fever of unknown origin was presented to our clinic for F-18 FDG PET/CT imaging. Baseline PET/CT images demonstrated intense F-18 FDG uptake in the aorta, bilateral subclavian and brachiocephalic arteries consistent with Takayasu arteritis. After 2 months of immunosuppressive therapy, she was asymptomatic and follow-up FDG PET/CT scan showed almost complete disappearance of large vessels’ F-18 FDG uptake. FDG PET/CT is a sensitive technique for assessing presence of large-vessel vasculitis such as Takayasu arteritis, extent of large-vessel inflammation and disease activity after therapy.Conflict of interest:None declared.

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