Any autosomal dominant complex spastic paraplegia in which the cause of the disease is a mutation in the ALDH18A1 gene. The disease is Monarch Disease Ontology term MONDO_0015091 (autosomal dominant spastic paraplegia type 9). Also known as: ALDH18A1 autosomal dominant complex spastic paraplegia, SPG9, autosomal dominant complex spastic paraplegia caused by mutation in ALDH18A1, cataracts-motor neuropathy-short stature-skeletal anomalies syndrome, spastic paraparesis-amyopathy-cataracts-gastroesophageal reflux syndrome.