title: Ultrasonography and computed tomography in the diagnosis of homogeneous masses.
abstract: Ultrasonography can demonstrate the homogeneity, while CT can demonstrate the density of a mass lesion. If a mass appears echo-free at ultrasonography, but is denser than water at CT, a solid tumor with grossly uniform cellular structure (usually a lymphoma or sarcoma), or a hematoma or hemorrhagic cyst is likely. However, if the mass has water density at CT, a cystic lesion is confirmed. One case for each category is presented.
mesh_terms: D000328:Adult; D005260:Female; D005350:Fibroma / Q000175:diagnosis / Q000000981:diagnostic imaging; D018219:Histiocytoma, Benign Fibrous / Q000175:diagnosis / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D010181:Pancreatic Cyst / Q000175:diagnosis / Q000000981:diagnostic imaging; D010190:Pancreatic Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography