PMC3687434_01
Coronal (A) positron emission tomography/computed tomography with the use of 18F-fluorodeoxyglucose (FDG PET/CT) images of the trunk and transverse (B) FDG PET/CT images of the abdominal cavity showing abnormal mass. Focal FDG uptake in the tumour (Nuclear Medicine Department, The Oncology Center, Bydgoszcz). FDG - 18F-fluorodeoxyglucose; PET/CT - positron emission tomography/computed tomography
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Positron emission tomography/computed tomography with the use of 18F-fluorodeoxyglucose (FDG PET/CT) imaging revealed the presence of an uneven lesion, 42 mm x x 30 mm x 52 mm in size, located at the level of the lower half of the right kidney, in front of the kidney, as well as an elevated glucose metabolism focused in this area, 34 mm x 43 mm x 37 mm in size (Fig. 1).
Histological features of a schwannoma. This is a spindle-cell lesion (A), magnification 10x. The cells express S-100 protein (B) and vimentin (C), magnification 10x; are CD117 negative (D), magnification 20x
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The pathology report showed the presence of spindle-shaped cells with nuclear palisading (Fig. 2A). Immunohistochemically, the tumour cells were diffusely positive for S-100 protein (Fig. 2B) and vimentin (Fig. 2C) but negative for smooth muscle actin (SMA), CD 117, Ki67, desmin, CK MNF and CD 34 (Fig. 2D).