[Gitelman syndrome: a crucial role of laboratory medicine for the diagnosis].

We described a case of Gitelman syndrome. A 56-year-old healthy man presented with facial paralysis. Initial laboratory tests revealed hypokalemia.

[Kidney diseases in dystrophic epidermolysis bullosa: case report].

Dystrophic epidermolysis bullosa is a genetic skin disease of which the recessive subtype also named Hallopeau-Siemens is the most severe. It is due to lack of expression of type VII collagen which is essential for dermal anchoring. Severe obstructive uropathies of the urethral and bladder area may occur during the first years of life, in relation to local bullous activity.

[Renin-secreting tumour: about a new diagnosed case during pregnancy].

A 29 year-old female patient developed severe arterial hypertension in the beginning of her second pregnancy. Investigations performed at 16 weeks of amenorrhea showed hypokaliemia in relation to severe hyperreninism: plasma active renin was 25 fold normal value, 94% as prorenin (prorenin representing 94% of total renin). Radiological investigations including ultrasonography and MRI disclosed an homogenous and avascular tumor in the right kidney.