Biomedical subjects
Publications and source records attributed to M A Matzinger.
Ultrasonography is the modality of choice in differentiating between cystic and solid renal lesions. It is somewhat less effective in demonstrating renal calculi. We report here a patient referred for investigation of a calcified renal mass, in whom ultrasonography permitted the diagnosis of milk of calcium in a calyceal diverticulum.
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A previously unreported pattern of enhancement of the liver on CT in a 7-month-old female with cirrhosis is illustrated. Precontrast scans showed the liver to have a normal homogeneous density throughout. Scans performed immediately after rapid bolus injection of contrast showed an uneven enhancement of the entire liver. Bands of enhancing tissue (thought to represent vascular fibrous tissue) surrounded more extensive areas that enhanced less markedly. Delayed post-injection scans revealed again an even level of density throughout the liver.
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An enlarged Column of Bertin is a frequent cause of renal pseudotumor. In a retrospective study of the ultrasound findings in 11 patients with columnar hypertrophy, we have attempted to establish objective sonographic criteria of this entity. Columnar hypertrophy appears as a renal mass with the following characteristics: (1) indents the renal sinus laterally; (2) clearly defined from the renal sinus; (3) largest dimension of less than 3 cm; (4) continuous or contiguous with the renal cortex; and (5) Echogenicity close to that of the cortex. Two minor criteria are also presented, and the present appropriate use of the criteria is suggested.