[Detection of RAS genes mutation using the Cobas method in a private laboratory of pathology: Medical and economical study in comparison to a public platform of molecular biology of cancer].

In France, determination of the mutation status of RAS genes for predictive response to anti-EGFR targeted treatments is carried out by public platforms of molecular biology of cancer created by the French National Cancer Institute. This study aims to demonstrate the feasibility of these analyses by a private pathology laboratory (MEDIPATH) as per the requirements of accreditation. We retrospectively studied the mutation status of KRAS and NRAS genes in 163 cases of colorectal metastatic cancer using the Cobas technique.

Immunostaining by complement C9: a tool for early diagnosis of myocardial infarction and application in forensic medicine.

Before the first 12 hours, diagnosis of early myocardial infarctions is always difficult for forensic pathologists. We tested complement C9 expression in 121 formalin-fixed and paraffin-embedded heart samples by an immunohistochemical procedure. The heart specimens were separated into four groups: 33 cases in group 1 with typical ischemic damages histologically located, 20 cases in group 2 with death related to myocardial infarction on the basis of ischemic presentation on electrocardiogram but no obvious histological ischemic damage, 35 cases in group 3 with severe coronary disease without cause of death found at the autopsy, and 33 cases in group 4 without sign of myocardial infarction and without coronary disease.

[Destruction of tattoo by ruby laser].

The originality of tattoo destruction by ruby laser is to selectively treat the tattooed areas without injuring the surrounding normal cells, in order to obtain better healing. Therefore, we selected a red laser (ruby, emitting at 694.3 nm), with very short flashes (100 ns with self Q switched ruby laser).

[The value of ultrasound-guided cyto-biopsy in the study of livers with abnormal ultrasonograms].

This retrospective study considers the diagnostic reliability of 97 cyto-biopsies performed with a fine needle and guided by ultrasonography in 92 patients with one or several suspicious liver lesions. The results of the cyto-biopsy were compared with the final diagnosis obtained by histological examination or by the evolution. In 65 confirmed malignant tumors, fine needle biopsy was concordant in 54 cases.

Value of sonographically guided fine needle aspiration biopsy in evaluating the liver with sonographic abnormalities.

This retrospective study was undertaken to evaluate the diagnostic usefulness of 97 sonographically guided fine needle aspiration biopsy cytologies in 92 patients with one or more hepatic lesions suspicious of malignancy. Results of the fine needle aspiration biopsy were then compared with the definitive results obtained by histologic examination, or with the subsequent course of the patient. A final diagnosis of malignancy was established in 65 cases, of which fine needle aspiration biopsy cytology revealed a concordant diagnosis in 54 cases.