SPG11 and hereditary spastic paraplegia: In the HSP group, “ear of the lynx” and thinning corpus callosum are common and characteristic findings for SPG11 (case 11 and 12) and SPG15 (case 13), especially for SPG11 [5, 8], and non-specific white matter lesions (case 14/SPG35) and cerebellar atrophy (case 15/SPG46) have been described.