Ultrasonographic evaluation of the retrocaval region.
D000310:Adrenal Gland Neoplasms / Q000175:diagnosis; D006801:Humans; D007680:Kidney Neoplasms / Q000175:diagnosis / Q000556:secondary; D008107:Liver Diseases / Q000175:diagnosis; D008113:Liver Neoplasms / Q000175:diagnosis / Q000556:secondary; D008207:Lymphatic Metastasis; D008223:Lymphoma / Q000175:diagnosis; D009362:Neoplasm Metastasis; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D012187:Retroperitoneal Space; D013131:Spine / Q000002:abnormalities; D014463:Ultrasonography; D014682:Vena Cava, Inferior