| A rare complex form of hereditary spastic paraplegia with the onset in early childhood of progressive spastic paraplegia associated with cerebellar signs, short stature, delayed psychomotor development, intellectual disability and less commonly, foot contractures, dysarthria, dysphagia, strabismus and optic hypoplasia. Caused by mutations in the DDHD2 gene (8p11.23) encoding phospholipase DDHD2. |