[Recurrence of common truncus arteriosus. Prenatal diagnosis of a case report].

We report a case of isolated truncus arteriosis diagnosed prenatally which recurred during a subsequent pregnancy. This observation would suggest an increased risk of recurrent single trunk malformation as compared with other congenital heart diseases, in agreement with our understanding of the genetic processes involved. A prenatal screening can be achieved with a systematic examination of the fetal morphology.

Efficacy and safety of a perioperative enoxaparin regimen in total hip replacement under various anesthesias.

Four trials in which enoxaparin, a low-molecular-weight heparin, was used in patients having hip surgery are reported. In the first two trials, enoxaparin was given before general anesthesia. The protocol consisted of 40 mg of enoxaparin, 4,000 anti-factor Xa IU, subcutaneously 12 hours before surgery, followed by the same dose 12 hours after surgery and then once daily.

Once-daily dosing of enoxaparin (a low molecular weight heparin) in prevention of deep vein thrombosis after total hip replacement.

The main results of three successive prospective clinical trials which represent the successive steps in the definition of once-daily dosing of enoxaparin in elective hip surgery are demonstrated. In the first trial, a dose of 40 mg/day (4000 anti-Factor Xa IU), in one or two subcutaneous injections, was preferred to a dose of 60 mg because it gave the same efficacy with a better tolerance. In a second, randomized double-blind trial, the two modes of administration of a dose of 40 mg, in one or two injections daily, were found to be equivalent with regard to tolerance and efficacy.

[A rare tumour: paravesical pelvic haemangiopericytoma (author's transl)].

Haemangiopericytomas are vascular tumours derived from Zimmerman's pericytes, the cells surrounding blood capillaries which correspond to the smooth muscle cells in the arterial and venous walls. This rarely observed tumour is usually found in the limbs (more than 50 p. cent of cases) or the face.