Imaging findings of extrapulmonary metastases of osteosarcoma

Clinical Imaging
Seung Ja KimHeung Sik Kang

Abstract

To review imaging findings of extrapulmonary metastasis from osteosarcoma and to evaluate them for any consistent pattern and correlation between imaging findings. This study was retrospectively conducted in 13 patients with extrapulmonary metastasis of pathologically confirmed osteosarcoma. We evaluated the radioisotope (RI) scans (n=16), ultrasonography (USG) (n=4), computed tomography (CT) scans (n=10), MRIs (n=6), clinical records, and pathological reports for assessment of imaging findings and correlation between radiologic findings and RI uptake of the lesions. Points evaluated were the following: uptake on RI scans, presence of mineralization on CT, and MRI, size, enhancement pattern, attenuation on CT, signal intensity (SI) on MRI, and echogenicity on USG. Extrapulmonary metastatic sites were diverse, including another bone other than the primary site (n=6), lymph node (n=4), pleura (n=2), liver (n=2), pancreas (n=1), kidney (n=1), peritoneum (n=1), muscle (n=1), and subcutaneous fat layer (n=1). One patient had tumor growth within the pulmonary artery and jejunum. Among 21 metastatic sites in 13 patients, bone scan was performed in 16 cases and RI uptake was detected in 10 lesions. Calcification was detected in eight l...Continue Reading

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