title: Primary retroperitoneal teratoma in adults: presentation of two cases and review of the literature.
abstract: Retroperitoneal teratomas are rare in adults; they are malignant in 25.8% of cases. The authors report two benign cases in which radiologic examination was essential in establishing the diagnosis. Irregular calcifications, which are visible in 61.5% of reported cases, cannot be considered a sign of benignity, since 12.5% of calcified tumors were malignant. Because of the indeterminate course of the disease, surgical removal is indispensable.
mesh_terms: D000328:Adult; D000792:Angiography; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D012186:Retroperitoneal Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging*; D013724:Teratoma / Q000098:blood supply / Q000000981:diagnostic imaging*