Biomedical subjects
D Rossignol
Publications and source records attributed to D Rossignol.
The increase in the number of liver sinusoidal pit cells in four patients with primary or metastatic cancer of the liver.
Four patients with liver carcinoma (case 1: hepatocellular carcinoma; cases 2 and 3: metastases; case 4: adenocarcinoma possibly of hepatic origin) underwent a wedge liver biopsy taken at some distance from the tumor. Liver histology was normal in cases 2 and 3. Sinusoids were dilated in case 4. Fibrosis formed bridges between portal tracts in case 1. In all 4 cases, sinusoids contained lymphocytic cells. By electron microscopy (perfusion-fixation with glutaraldehyde) numerous lymphocytes could be identified as pit cells with characteristic dense granules and occasional rod-cored vesicles. The majority of the pit cells were luminal cells in contact with endothelial or Kupffer cells; some were in the Disse space. It is now accepted that pit cells are resident large granular lymphocytes with natural killer activity. The increase in the number of pit cells in liver carcinoma compared to the number observed in the control group (uncomplicated gallbladder lithiasis) could be hypothetically interpreted as a defense mechanism against tumor extension.
[Direct urinary antibiotic sensitivity studies. A rapid method of therapeutic orientation in a urology department (author's transl)].
Two hundred and thirty antibiotic sensitivity studies performed directly on urine in a urology department were compared with the results of cytological and bacteriological examinations of the same urine in the laboratory. The direct sensitivity study proved valid in 65% of cases. This method, which shortens the time in which results are obtained, is thus useful in a urology department.
[Nephretic colic in patients with arrhythmia (author's transl)].
The authors relate one case of obstruction by emboly in the renal artery. The diagnosis were too late for conservative surgery. In this case, they insist on the particulary signs of that nephretic colic and they show the diagnosis measures which are able to permit a conservative surgery in urgency.