[Leiomyosarcoma of Meckel's diverticulum in cystic form]. / Léiomyosarcome du diverticule de Meckel à forme kystique.

BACKGROUND: Leiomyosarcoma is an uncommon small bowel tumor. About 60 cases of a Meckel's diverticulum localization have been reported. We present a very rare form of leiomyosarcoma arising in a Meckel's diverticulum, mimicking a very large abdominal cyst. CASE REPORT: Abdominal ultrasound evidenced a voluminous cystic mass in the abdomen of a 37-year-old man consulting for abdominal discomfort. Computed tomography visualized a tissular component with contrast uptake. Laparotomy was performed with resection of a 4 liter cyst on the Meckel's diverticulum. Histology reported leiomyosarcoma. DISCUSSION: Leiomyosarcoma of the small bowel mainly develops in an extraluminal localization. Necrotic remodeling explains the cyst formation. Computed tomography with contrast injection can be most helpful for diagnosis. Surgery provides the only possible cure in still localized forms. Other treatments have failed to demonstrate any benefit. Prognosis is mainly related to the histological grading according to the mitotic index.

[Chronic non-aneurysmal rupture of the infrarenal aorta. Report of a case]. / Rupture chronique non anévrysmale de l'aorte sous-rénale. A propos d'une observation.

We report a case of chronic rupture of the infra-renal aorta into the left psoas 6 years after implantation of an aorto-bifemoral prosthesis. There was no aneurysm nor false anastomotic aneurysm. The initially suspected diagnosis was acute sigmoiditis. We emphasize the polymorphous nature of clinical manifestations of chronic contained ruptures of the infra-renal aorta. Abdominal CT-scan is important for diagnosis. Strongly suspected, but not proven, sepsis led us to perform extra-anatomic revascularization after resection of the earlier prosthesis and ligature of the infra-renal aorta.