[Early detection of synchronous thyroid carcinoma and malignant melanoma by fluorodeoxyglucose positron emission tomography]. / Detection précoce d'un carcinome thyroïdien et d'un mélanome malin synchrones par une tomographie par emission de positron a la fluorodeoxyglucose: cas clinique.

Functional tumor imaging using Fluorodeoxyglucose positron emission tomography (FDG-PET) is a new method in clinical oncology. The 18 FDG, is a glucose analog that accumulates in cells in proportion to the rate of glucose metabolism, and increased carbohydrate metabolism has been recognized as a feature of malignant cells versus normal cells. In addition, it permits the detection of metastases or synchronous tumours not discovered by anatomic imaging. Although detection of the primary site of disease is usually accomplished well with conventional techniques, the performance of FDG-PET may be useful to determine tumours that are not clinically evident. The authors describe a case of early detection of synchronous thyroid carcinoma by FDG-PET in a young patient opereted on for a malignant melanoma on his arm.

[Emergency computed tomography in a general hospital center]. / Scanner en urgence dans un centre hospitalier général.

This retrospective study was performed to precise indications of emergency CT in a general hospital over a 30 months period. We tried to determine, with help of prior studies, the indications for CT of the brain in the management of acute meningitis, acute headache, and in the management of head injury. In acute meningitis, there is no evidence to recommend CT of the brain before lumbar puncture, except to identify patients at increased risk of cerebral herniation. The imaging study of choice in subarachnoid hemorrhage is non enhanced CT scan. This exam has to be performed in case of acute headache. The CT evaluation of patients with minor head injury remains controversial.