Left Ovarian Cyst With Overlying Sigmoid Colon.

Ovarian cysts are usually asymptomatic and self-resolvable, but large cysts can increase the risk of ovarian torsion or rupture and may be indicated for surgical intervention. We present the case of a large left ovarian cyst in which laparoscopic left salpingo-oophorectomy was challenged by an overlying sigmoid colon with dense adhesions. A 47-year-old female patient presented to the emergency department with abdominal pain in the right lower quadrant.

Arachidonic acid metabolism of rat peritoneal macrophages after passive sensitization and allergen challenge.

The aim of our work was to evaluate the effect of passive sensitization of rat peritoneal macrophages (treatment of cells by an anti-ovalbumin IgE-rich serum) on arachidonic acid (AA) metabolism and the impact of specific antigen (ovalbumin) on this process. Compared to a control treatment without serum, the atopic serum and a serum without IgE, used on [3H]AA-labeled macrophages, increased cyclooxygenase and lipoxygenase eicosanoid production. Sera, used prior to [3H]AA incorporation, induced a decrease of 3H-labeled membrane phospholipids and an increase of lipoxygenase metabolites in the [3H]AA incorporation medium.

Possible implication of arachidonic acid metabolism in the decrease of chemiluminescence production after exposure of murine peritoneal macrophages to diethylnitrosamine and tumour promoter, 12-O-tetradecanoylphorbol-13-acetate.

The effect of the carcinogen diethylnitrosamine (DEN) on prostaglandins (PGs), leukotrienes (LTs) and reactive oxygen intermediates production by murine peritoneal macrophages was assessed. In vitro exposure to DEN (0.8, 1.

The lavage fluid from a patient with alveolar proteinosis inhibits the in vitro chemiluminescence response and arachidonic acid metabolism of normal guinea pig alveolar macrophages.

Pulmonary alveolar proteinosis is characterized by the accumulation of a lipoproteinaceous material within the alveoli of the lung. It is well established that patients with pulmonary alveolar proteinosis have a high incidence of complicating pulmonary infections possibly resulting from defects of antibacterial functions of alveolar macrophages. Moreover, for unclear reasons, an inflammatory response in the airways is frequently absent.

[Effects of cotrimoxazole on some macrophage functions: microbicide, tumoricide, production of free oxygen radicals, prostaglandins and leukotrienes].

In order to demonstrate an immunomodulating effect of cotrimoxazole, we investigated its influence on some macrophage (M phi) functions in culture: P815 tumor cells killing, Toxoplasma gondii killing, production of free oxygen radicals by luminol-dependent chemiluminescence, prostaglandins and leukotrienes secretion evaluated after incorporation of tritiated arachidonic acid. In vitro, cotrimoxazole inhibited in a dose-dependent fashion the chemiluminescence of murine resident peritoneal or guinea pig alveolar M phi. Production of prostaglandin (PG) 6-keto-F1 alpha, PGF2 alpha, and 5-hydroxyeicosatetraenoic acid by resident peritoneal M phi was also inhibited.