• Diffusion weighted magnetic resonance imaging (DWI) can confirm acute pyelonepritis. • DWI provided comparable results to gadolinium enhanced T1-W MRI in acute pyelonepritis. • Contrast medium injection could be avoided for diagnosing acute pyelonephritis by MRI. • MRI with T2-WI and DWI provide a fast and comprehensive diagnostic tool.

We report a case of Herlyn-Werner-Wunderlich syndrome diagnosed in the neonatal period. US revealed the classic association of a uterus didelphys with blind hemivagina and no ipsilateral kidney. The diagnosis was established by postnatal US and confirmed by MRI. Differential diagnoses are discussed. A trans-hymeneal resection of the vaginal septum was performed at 1 month of age. Intra operative endoscopy revealed no left hemitrigone but showed an atretic orifice in the ipsilateral blind hemivagina, probably corresponding to the insertion of an ectopic ureter. Follow-up was unremarkable.

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We present the case of a large yolk sac tumour of the ovary in a 14-year-old girl with high level of serum alpha-feto-protein (AFP). Multidisciplinary care is important to do appropriate surgical treatment with the aim of fertility preservation.