In utero diagnosis of agenesis of the ductus arteriosus in a twin pregnancy: an unusual case presentation.

Agenesis of the ductus arteriosus is a rare congenital cardiac anomaly which should be considered within the differntial prenatal diagnosis of hydrops fetalis.

Pregnancy complicated by emphysematous pyonephrosis.

Emphysematous pyonephrosis is a rare, rapidly progressive infection characterized by the presence of exudative material and fermentative gases within a dilated renal collecting system. This unusual clinical entity is noted almost exclusively in diabetic patients, often in conjunction with chronic urinary tract infection and obstruction. In most instances, E.