title: Infantile polymyositis: a case report.
abstract: A 10-month-old Japanese boy developed progressive muscle weakness and hypotonia at 3 months of age. Because of striking inflammatory cellular infiltration in his muscle biopsy, he was diagnosed as having infantile polymyositis and was placed on steroid and immunosuppressive medication when he was 10-month-old. His physical condition was not significantly altered, though serum creatine kinase (CK) level was normalized (1,500 iu/l----90 iu/l). These findings contrast with previous reports documenting improvement with steroid administration.
authors.affiliation: Department of Neurology, Tokyo Metropolitan Kiyose Children's Hospital, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nagai
authors.forename: T
authors.initials: T
authors.lastname: Hasegawa
authors.forename: M
authors.initials: M
authors.lastname: Saito
authors.forename: S
authors.initials: S
authors.lastname: Hayashi
authors.forename: I
authors.initials: I
authors.lastname: Nonaka
mesh_terms: D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D003402:Creatine Kinase / Q000097:blood; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009132:Muscles / Q000201:enzymology / Q000473:pathology; D009220:Myositis / Q000188:drug therapy / Q000201:enzymology / Q000473:pathology*
chemical_list: D000305:Adrenal Cortex Hormones; D003402:Creatine Kinase