[Echography in pyelocaliceal tumors].

In a study of over 32 pyelocaliceal tumors greater than 1 cm in diameter, the authors review retrospectively the reports of the pyelographic and sonographic documents obtained in these patients before the definitive diagnosis was confirmed by the pathological examination. They observed that pyelography has a much greater diagnostic accuracy than does sonography: 31 confirmed (27) or suspected (4) tumors whereas only one tumor was overlooked (silent kidney) on pyelography and 12 diagnosed tumors, 15 overlooked and 5 diagnostic errors on ultrasonography. However, it should be noted that the results of ultrasonography are much better when the results of the intravenous pyelogram are known than when the latter is performed first.

[Encysted renal tumor in adults. Apropos of an unusual ultrasonographic and anatomo-pathological case].

Ultrasound imaging in a 45 years old man with a one year history of bladder stone colic treated medically detected a partly encysted tumoral mass in the corticomedullary zone of upper pole of right kidney. Extemporaneous examination, requested because of the original macroscopic appearance of this tumor, prevented excision of right kidney. The atypical microscopic appearances, not found during a literature review, justify reporting of this case.

[Chance's fracture].

Described by Chance (1948) this fracture is induced by a mechanism of flexion distraction (seat belt fracture). The injury is characterized by the following (W.S.

[Tear drop fractures. Contribution to the study of the mechanism of osteo-disco-ligamentous lesions].

Since the original description by Schneider (1956), the tear drop fracture is designated as a flexion fracture. The C.A.