has material basis in has symptom glycogen storage disease IX autosomal recessive disease glycogen storage disease IXc disease_ontology A glycogen storage disease IX characterized by autosomal recessive inheritance of hepatomegaly, hypotonia, growth retardation, and liver dysfunction with onset in childhood and improvement of symptoms with age that has_material_basis_in homozygous and compound heterozygous mutation in the PHKG2 gene on chromosome 16p11. GSD type 9C GSD type IXc GSD9C ICD10CM:E74.0 DOID:0111043 MIM:613027 MESH:C567809 glycogen storage disease type 9C glycogen storage disease type IXc glycogenosis type 9C glycogenosis type IXc autosomal recessive inheritance hepatomegaly left upper quadrant abdominal rigidity