[Spontaneous hemorrhage of the quadrigeminal plate: description of two cases].

Introduction: Spontaneous mesencephalic hemorrhages are very unusual, specially those located in the tectal region. Hypertension is a less important factor that in other classical locations. Other etiologies reported are arteriovenous malformations, coagulation disorder and trauma.

[Actinomyces as the etiology of empyema].

Thoracic actinomycosis represents 25% of all cases of the disease, whose presentation varies greatly. Pleural involvement is unusual and only rarely is it found as an isolated sign. We describe 2 cases of empyema due to actinomycosis; both cases responded well to surgical drainage and antibiotics.