Autosomal recessive disorder caused by deficiency of the enzyme glucocerebrosidase featuring the pathological storage of glycosylceramide in mononuclear phagocytes; the most common subtype is the non-neuronopathic form, a slowly progressive condition characterized by hepatosplenomegaly and skeletal deformities; the neuronopathic forms are divided into infantile and juvenile forms; the infantile form presents at 4-5 months of age with anemia, loss of cognitive gains, neck retraction, dysphagia, and hepatosplenomegaly; the juvenile form features a slowly progressive loss of intellect, hepatosplenomegaly, ataxia, myoclonic seizures, and spasticity; the neuronopathic forms are characterized by neuronal loss with neuronophagia, and accumulation of glucocerebroside in neurons.