Table 3: Comparison between previous and current study.

YearAuthorNo. of casesMetastatic rateExtrapulmonary metastatic ratePulmonary metastatic rateCommon sites of the extrapulmonary metastases

2007Schwab JH23031%17%14%Bone, Soft tissue, Abdomen
1999Spillane AJ5020%Abdomen, Retroperitoneum
1997Pearlstone DB10232%30%2% Retroperitoneum, Chest wall
1996Kilpatrick SE9535% Retroperitoneum, Abdomen, Chest wall
2010Current study5819%14%5%Bone, Soft tissue