MR and CT imaging in the Dyre-Davidoff-Masson syndrome: report of three cases and contribution to pathogenesis and differential diagnosis

Cerebral hemiatrophy of Dyke-Davidoff-Masson syndrome is a condition characterized by seizures, facial asymmetry, contralateral hemiplegia or hemiparesis, and mental retardation. These findings are due to cerebral injury that may occur early in life or in utero. The radiological features are unilateral loss of cerebral volume and associated compensatory bone alterations in the calvarium, like thickening, hyperpneumatization of the paranasal sinuses and mastoid cells and elevation of the petrous ridge. The authors describe three cases. Classical findings of the syndrome are present in variable degrees according to the extent of the brain injury. Pathogenesis is commented.

Esterotomografia para o diagnóstico e para a localizaçäo das lesöes encefálicas profundas / CT-guided stereotaxyc for biopsy and localization of deep brain lesions

Os autores descrevem a ténica de estereotomografia utilizada para biópsia estereotomográfica (14 doentes) e para a localizaçäo de malformaçäo arteriovenosa profunda, a fim de permitir o correto acesso cirúrgico (1 doente). Concluem pela simplicidade, maleabilidade, precisäo e segurança do método, em comparaçäo com a biópsia estereotáxica convencional