title: Small renal cell carcinoma: pathologic and radiologic correlation.
abstract: The authors correlated the radiologic and pathologic findings of 36 patients with small renal cell carcinoma (less than or equal to 3 cm in diameter). Tumors were discovered incidentally or by means of mass surveys with ultrasound (US). Computed tomography (CT) and angiography were performed before surgery. Of the 36 tumors, 24 were of solid (alveolar) architecture, five were of papillary architecture, three were of tubular architecture, and four were of multilocular cystic architecture. Cell arrangement was closely correlated with radiologic appearance, especially in regard to tumor vascularity and echogenicity. Histologically homogeneous tumors of solid architecture were hypoechoic at US and hypervascular at angiography and contrast medium-enhanced CT. Tumors of papillary, tubular, and multilocular cystic architecture were hyperechoic at US and hypovascular at angiography. There was no correlation of cell differentiation and cell architecture with echogenicity or tumor vascularity. Tumors with hemorrhage showed marked hyperattenuation at CT. A tumor capsule was observed in 25 patients (69%); this was demonstrated as a rim at US or angiography.
authors.affiliation: Department of Radiology, Kumamoto University School of Medicine, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamashita
authors.forename: M
authors.initials: M
authors.lastname: Takahashi
authors.forename: O
authors.initials: O
authors.lastname: Watanabe
authors.forename: S
authors.initials: S
authors.lastname: Yoshimatsu
authors.forename: S
authors.initials: S
authors.lastname: Ueno
authors.forename: S
authors.initials: S
authors.lastname: Ishimaru
authors.forename: M
authors.initials: M
authors.lastname: Kan
authors.forename: S
authors.initials: S
authors.lastname: Takano
authors.forename: N
authors.initials: N
authors.lastname: Ninomiya
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002292:Carcinoma, Renal Cell / Q000000981:diagnostic imaging* / Q000473:pathology; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D007668:Kidney / Q000000981:diagnostic imaging / Q000473:pathology*; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D011859:Radiography; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography