Objective:To evaluate the value of multi-slice computed tomography(CT) in differential diagnosis of renal clear cell carcinoma and renal papillary carcinoma.Methods: The CT images of 47 patients with renal cell carcinoma(RCC) were reviewed.The RCC patients were divided into 2 groups pathologically,including 37 cases of clear cell RCC and 10 cases of papillary RCC.Plain scan and three phase(corticomedullary,nephrographic and excretory phases) CT were performed in all patients.Age and sex of patients,tumor size,enhancement degree and pattern(homogeneous,heterogeneous and predominantly peripheral),the presence of calcification or cystic degeneration(necrotic or hemorrhagic areas within the tumor) and tumor spreading(including perinephric change,venous invasion and lymphadenopathy) were compared between the 2 subtypes.Results: The degrees of enhancement were significantly different between the 2 subtypes in the corticomedullary,parenchymal and excretory phases(P

OBJECTIVE: To discuss the application of spiral CT imaging of temporal bone in diagnosing the chronic otitis media with cholesteatoma. METHOD: The clinical data and spiral CT manifestation of 104 cases of chronic otitis media with cholesteatoma were retrospectively analyzed. All the diagnoses were confirmed by operation and pathology. RESULT: Spiral CT imaging could accurately show the signs of soft-tissue occupancy and bony-erosion of by cholesteatoma in middle ear which originated from various sites and of various sizes. Comparing the CT imaging before surgery and the findings during the operation, the consistency in bone erosion was 89.1%, in soft-tissue occupancy was 94.4% and in invasion of ossicle chain was 89.3%. CONCLUSION Spiral CT imaging plays an important role in diagnosing cholesteatoma and especially the bony-erosion and the soft-tissue occupancy, which can provide crucial information for the surgery.
Adolescent ; Adult ; Aged ; Child ; Child, Preschool ; Cholesteatoma, Middle Ear ; diagnosis ; diagnostic imaging ; Female ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Tomography, Spiral Computed ; Young Adult