DO_rare_slim NCIthesaurus has material basis in disease has location MASA syndrome GARD:6986 2015-01-28T16:49:53Z disease_ontology NCI:C129930 A hereditary spastic paraplegia that is characterized by hydrocephalus, spasticity of the lower limbs, adducted thumbs, aphasia, seizures, agenesis of the corpus callosum and intellectual disability in the mild to moderate range. CRASH syndrome Gareis-Mason syndrome MIM:303350 ORDO:2466 DOID:0060246 L1 syndrome NT MGI. UMLS_CUI:C0795953 SNOMEDCT_US_2025_09_01:838441009 MESH:C536029 SPG1 X-linked complicated hereditary spastic paraplegia type 1 X-linked corpus callosum agenesis X-linked spastic paraplegia 1 hereditary spastic paraplegia 1 X-linked recessive disease hereditary spastic paraplegia brain disease X-linked recessive inheritance brain