NUT midline carcinoma (NMC) is a newly defined and lethal cancer with aggressive course. It mostly affects children and young adults. Diagnosis is confirmed with the evidence of BRD4-NUT mutation on the chromosome 15q14 by fluorescence in situ hybridization. Use of (18)F-FDG PET/CT in NMC patients is very limited in the literature. In this report, we describe a 7-year-old boy with the diagnosis of NMC who was scanned with (18)F-FDG PET/CT for staging and treatment response evaluation after the chemotherapy. It was disseminated and had moderate FDG avidity in the initial scan and showed progression after 4 cycles of chemotherapy. We also reviewed the literature related to (18)F-FDG PET/CT in staging and assessment of chemotherapy response of NMC.
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