[Postoperative pseudo-diverticulum of the small intestine as a cause of digestive hemorrhage (author's transl)]

Investigations in a 38-year-old woman with recurrent digestive hemorrhages demonstrated the presence of two diverticular images close to each other at the end of the ileum. Operation revealed distention of two blind loops at either end of a laterolateral anastomosis of the small intestine. This type of surgical procedure, now abandoned, may produce local complications. A history of surgical treatment on the small intestine should suggest this possibility, and confirmation is obtained by radiological examination.

[Left intertracheo-oesophageal pulmonary artery (author's transl)]

The authors report on case of this vascular malformation in an infant aged eight months, and describe its most interesting features known at the present time: embryology, variability of radiological signs, differential diagnostic problems, and more particularly the indications for therapy, tracheobronchial malacia lesions playing an essential role in the prognosis.

[Twisted pedunculated pleuro-pericardial cyst (author's transl)]

An unusual case of a pleuro-pericardial cyst is reported. The mobile character of its shadow in thoracic chest x-rays and the sudden onset of the unilateral chest pain suggested that the cyst was pedunculated and twisted. This was confirmed by operation.

[Intra-uterine gestational age. The value of calcification of dental crowns (author's transl)]

Calcification in the first decidual molar tooth first appears at the 33-34th week of gestation; and the second at the 36-37th week. It is therefore a stable and precise index of gestational age. It can be estimated in over two-thirds of films of the intra-uterine contents chosen at random. The search for this sign can complement or take the place of looking for epiphyseal centres in the knee. It gives information about gestational age in pathological conditions where bony maturation is abnormal.

[Ureteral compression by an aneurysm of the hypogastric artery. Two cases (author's transl)]

Aorto-iliac aneurysms produce ureteric obstrucation by different mechanisms: deviation, compression and, above all, encirclement by peri-aneurysmal fibrosis. Whilst it is rare to find this as the cause for apparently primary ureteric obstruction, individuals with aorto-iliac aneumrysms quite often show evidence of ureteral abnormalities. The two cases presented illustrate these two possibilities. Routine pre-operative urography, or seven better a urographic phase of arteriography, is therefore suggested.