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  • Title: CT imaging of primary pleuropulmonary synovial sarcoma.
    Author: Zhang WD, Guan YB, Chen YF, Li CX.
    Journal: Clin Radiol; 2012 Sep; 67(9):884-8. PubMed ID: 22516187.
    Abstract:
    AIM: To evaluate the computed tomography (CT) imaging findings of primary pleuropulmonary synovial sarcoma. MATERIALS AND METHODS: Five cases of synovial sarcoma confirmed by histopathology and cytogenetic study were retrospectively analysed. All patients had undergone chest radiography and unenhanced and contrast-enhanced CT examinations, and three had also undergone multiphase CT enhancement examinations. Image characteristics, including shape, size, margin, and attenuation of each lesion before and after contrast enhancement, were analysed. RESULTS: The chest radiographs of the five patients showed well-defined or partly well-defined masses, which were homogeneous and without associated calcification or lymphadenopathy. Pneumothorax was present in one patient. The unenhanced CT images showed well-defined, heterogeneous masses with patchy low density in all five patients. The contrast-enhanced CT images showed heterogeneous enhancement in all cases, three of which demonstrated cystic and necrotic areas. The tumour showed no prolonged or delayed enhancement in three cases using multiphase CT. There were small pleural effusions in four cases. No calcification was observed in any of the cases. There was no evidence of hilar or mediastinal lymphadenopathy. CONCLUSIONS: In these five patients, primary pleuropulmonary synovial sarcoma presented as a well-defined mass with patchy low density and heterogeneous enhancement, with no evidence of regional lymphadenopathy. It should be included in the differential diagnosis of regional tumours.
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