Ganglioside sialidase deficiency disease is a rare genetic disorder that affects the metabolism of gangliosides, a type of lipid found in the nervous system. Also known as sialidosis, this condition is characterized by the deficiency of an enzyme called ganglioside sialidase. Individuals with this disorder may experience a variety of symptoms including developmental delays, muscle weakness, and impaired vision. While "ganglioside sialidase deficiency disease" is the specific medical term for this condition, it is commonly referred to as sialidosis or gangliosidosis. These terms are often used interchangeably to describe this rare disorder that impacts the nervous system.