Fig. 4
From: 18F-FDG PET/CT findings of intermediate bone tumors of the spine
(A,B) A 37-year-old woman with LCH; (A) Axial CT reveals low-density osteolytic bone destruction shadow on the left vertebral plate of the first thoracic vertebra, without sclerotic rims (arrow); (B) The PET/CT fusion image of the corresponding area shows obviously increased 18F-FDG uptake (arrow), with a SUVmax of 8.9, suggesting that the lesion is in an active phase. (C–F) A 23-year-old woman with LCH; (C), Axial CT revealed low-density osteolytic bone destruction in the third lumbar vertebrae (arrow), without the formation of soft tissue masses; (D), The PET/CT fusion image of the corresponding area shows mildly increased 18F-FDG uptake (arrow), with a SUVmax of 3.5; and sagittal images (E CT; F PET/CT) revealed lesions with osteosclerotic rims (arrows), suggesting that the lesion may be in remission. LCH = langerhans cell histiocytosis.
