Behavioral & Cognitive Disorders
Aug. 18, 2022
Nearly 3,000 illustrations, including video clips of neurologic disorders.
Every article is reviewed by our esteemed Editorial Board for accuracy and currency.
Full spectrum of neurology in 1,200 comprehensive articles.
Listen to MedLink on the go with Audio versions of each article.
Classification system proposed by Delalande and Fohlen in 2003. Type I: Hypothalamic hamartoma lesion in which the horizontal plane of attachment is completely below the floor of the third ventricle. Type II: Hypothalamic hamartoma lesion in which there is a vertical plane of attachment to the walls of the third ventricle, completely above the floor of the third ventricle. Type III: Hypothalamic hamartoma lesion in which the plane of attachment is both above and below the floor of the third ventricle, and thereby possessing a plane of attachment that is both vertical (in the third ventricle) and horizontal (attached to the inferior surface of the hypothalamus). Type IV: characterized as “giant” hypothalamic hamartoma lesions, without clear criteria for the boundary between Types III and IV. (Used with permission from Barrow Neurological Institute.)