Renal Fibrolipomatosis

Abstract

Four patients with renal fibrolipomatosis are presented. The clinical and radiological features are discussed, attention being drawn to the diagnostic appearances seen on the excretion pyelogram. It is suggested that the condition be classed into primary and secondary varieties. A relationship between infection, hilar lymphatic obstruction and fibro-fatty overgrowth is postulated.

Renal Sinus Lipomatosis: A Report of Twenty-Six Cases

“…Age Incidence.-Both in our series and in the combined series the maximum incidence is found in the sixth decade. Causes.-The following have been stated to be aetiologically related to renal sinus lipomatosis (Kutzmann, 1931;Roth and Davidson, 1938;Faegenburg et al, 1964;Kreel et al, 1966):…”

“…Diagnostic Criteria.-As renal sinus lipomatosis is not known to produce symptoms distinct from those of any underlying disease (Kreel et al, 1966) or, as is more frequent nowadays, by the radiologist. The radiological diagnostic criteria used in this study are based on the work of Windholz (1951), Olsson andWeiland (1963), Faegenburg et al (1964), and Kreel et al (1966).…”

“…Faegenburg et al (1964) have stated that in some cases the renal substance, measured from the peripheral aspect of the calycine cup to the periphery, may be less than 1.2 cm. Kreel et al (1966) have suggested that in all cases outward displacement of the minor caiyces, that is diminution in the renal substance thickness, is the most characteristic finding. In none of our cases, however, did we find a renal substance thickness of less than 1.2 cm.…”

“…Renal sinus lipomatosis is the condition where there is an increase in the amount of fat in the renal sinus. The following terms have also been used to describe the condition: renal fibrolipomatosis (Olsson and Weiland, 1963;Kreel et al, 1966), replacement lipomatosis of the kidney (Kutzmann, 1931 ;Exley and Devereaux, 1935;Frumkin, 1947), renal lipomatosis (Kutzmann, 1931 ;Peacock and Balle, 1936;Priestley, 1938), fatty transformation of the kidney (Rickards, 1883), fatty replacement of the kidney, lipomatous paranephritis, and lipoma diffusum renis (Faegenburg et al, 1964). Of these terms, renal fibrolipomatosis is probably the most commonly employed at present, but as an increase in fibrous tissue is not invariably present, we prefer the term renal sinus lipomatosis.…”

Renal Hilus Lipomatosis Simulating Carcinoma of the Kidney

“…It is usually asymptomatic [12] and discovered mainly as a chance radiological finding [11]. The main sign is microscopic [9] and rarely macroscopic haematuria. The aetiology is unknown, although reflux, artherosclerosis, recurrent urinary tract infections and obesity have been suggested as predisposing factors [2,3], The most common type is replacement lipomatosis where the excess of adipose tissue replaces renal tissue destroyed by renal parenchymal diseases [1].…”