Clinical History A 70-year-old man was admitted to our department with a 4-month history of intermittent abdominal discomfort. Physical examination revealed a palpable mass in the left side of abdomen. Imaging Findings Abdominal computed... more
Clinical History A 70-year-old man was admitted to our department with a 4-month history of intermittent abdominal discomfort. Physical examination revealed a palpable mass in the left side of abdomen. Imaging Findings Abdominal computed tomography (CT) images show a large calcified mass (19x16 cm in size) in the left retroperitoneal space, containing both solid and fatty components, involving the perirenal adipose tissue and the left kidney [Fig.1]. The mass causes anterior displacement of the left kidney and descending colon, right displacement of the jejunum and inferior and superior mesenteric vessels, showing no evidence of infiltration of these structures [Fig. 2-3]. No enlargement of loco-regional lymph nodes was demonstrated. Surgical excision was performed and the post-operative histopathological result was a calcified dedifferentiated liposarcoma (DDLPS) arising from well-differentiated liposarcoma (WDLPS).
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PURPOSE In case of suspicion of locally recurrent rectal cancer, the use of MRI with diffusion-weighted MRI or [18F]-fluorodeoxyglucose (FDG) PET/CT still remains debated. Our purpose was to compare the two imaging modalities in the... more
PURPOSE In case of suspicion of locally recurrent rectal cancer, the use of MRI with diffusion-weighted MRI or [18F]-fluorodeoxyglucose (FDG) PET/CT still remains debated. Our purpose was to compare the two imaging modalities in the discrimination between local recurrence and post-treatment scar tissue. METHOD AND MATERIALS Since september 2010, all patients treated with neo-adiuvant chemio-radiation therapy and surgical resection for rectal cancer were referred, in case of high suspicion of local recurrence during follow-up, for MRI and PET/CT.25 patients were enrolled (17M, 8F; mean age: 64) and the mean time of the diagnostic evaluation after surgical resection was 14 months. MRI was performed with 1,5T superconductice magnet with TSE T2-w. scan on sagittal, axial and coronal planes, DWI axial scans (b values:50,400,800) and post-contrast fat saturated Flash 2D T1-w. axial scans. All exams were reported by two radiologists in consensus. Total-body PET/CT images were aquired 60 mi...