ICD-11 definition : GM1 gangliosidosis type 2 is a clinically variable, infancy or childhood-onset form
of GM1 gangliosidosis characterized by normal early development and psychomotor regression
between seven months and three years of age.;
GM1 gangliosidosis type 2 is a clinically variable, infancy or childhood-onset form
of GM1 gangliosidosis characterized by normal early development and psychomotor regression
between seven months and three years of age.