Efficacy of topical 0.05% retinaldehyde in skin aging by ultrasound and rheological techniques.

Background: The natural precursor of retinoic acid, i.e. retinaldehyde, has been proven to exert retinoid activities.

[Meningoencephalic and chorioretinal manifestations of toxoplasmosis in an immunodeficient patient].

With reference to a case of malignant toxoplasmosis in a patient with angioimmunoblastic lymphadenopathy, the following features are recalled: in compromised hosts, clinical manifestations of malignant toxoplasmosis are highly variable, with neurologic signs and fever being predominant; the occurrence of lesions of the fundus, such as chorioretinitis, is an essential clue to the diagnosis; serologic tests for toxoplasmosis should be performed routinely at each stage of the disease in order to ascertain seroconversion through comparison with baseline results.