ABSTRACT
Imaging features of metastases to the urinary system may closely mimic primary urinary tract tumors, and differential diagnosis by imaging alone may be problematic or even impossible in some cases. The main purpose of this article was to familiarize radiologists with imaging findings of metastasis to the urinary system on cross-sectional imaging, with an emphasis on abdominal and pelvic computed tomography and magnetic resonance imaging. In addition, we review the clinical importance and implications of metastases to the urinary tract and provide information on diagnostic work-ups.
Subject(s)
Diagnosis, Differential , Kidney , Magnetic Resonance Imaging , Neoplasm Metastasis , Ureter , Urethra , Urinary Bladder , Urinary TractABSTRACT
Malignant kidney neoplasms are the most frequently encountered solid kidney masses. Although renal cell carcinoma is the major renal malignancy, other solid malignant renal masses should be considered in the differential diagnosis of solid renal masses that do not contain a macroscopic fatty component. In this pictorial essay, we present the imaging findings of a primitive neuroectodermal tumor, primary liposarcoma of the kidney, primary neuroendocrine tumor, leiomyosarcoma, synovial sarcoma, malignant fibrous histiocytoma, sclerosing fibrosarcoma and renal metastasis of osteosarcoma.
Subject(s)
Humans , Middle Aged , Bone Neoplasms/secondary , Carcinoma, Renal Cell/pathology , Diagnosis, Differential , Fibrosarcoma/diagnostic imaging , Histiocytoma/diagnostic imaging , Kidney Neoplasms/pathology , Leiomyosarcoma/pathology , Magnetic Resonance Imaging , Neuroectodermal Tumors, Primitive/pathology , Osteosarcoma/pathology , Sarcoma , Sarcoma, Synovial/diagnostic imaging , Tomography, X-Ray ComputedABSTRACT
A 39-year-old female patient presented to our hospital with epigastric pain lasting for two months. Laboratory results showed impaired glucose tolerance. Ultrasonography of the patient showed a hypoechoic, diffusely enlarged pancreas. CT revealed a large pancreas, with multiple calcifications. On MRI, a diffusely enlarged pancreas was seen hypointense on both T1- and T2-weighted images with heterogeneous enhancement after gadolinium administration. A biopsy of the pancreas revealed primary amyloidosis of islet cells. Decreased signal on T1-weighted images without inflammation findings on CT and MRI were clues for the diagnosis.
Subject(s)
Adult , Female , Humans , Amyloidosis/diagnosis , Contrast Media , Diagnosis, Differential , Diagnostic Imaging , Glucose Tolerance Test , Islets of Langerhans/pathology , Pancreatic Diseases/diagnosisABSTRACT
Persistent sciatic artery PSA represents the persistence of the sciatic vessel in adult life that is responsible for the major blood supply to the lower limb in early embryologic development. The incidence of PSA has been estimated as low as 0.025-0.04%. We present 2 cases of PSA, one of which was complicated by an aneurysm that led to a life-threatening hemorrhage