title: [Deletion of the long arm of chromosome 18, primary hypothyroidism, Biermer's anemia and IgM hypogammaglobulinemia].
abstract: We report the case of an adolescent girl who presents with the 18q-syndrome, primary hypothyroidism, pernicious anemia and IgM hypogammaglobulinemia. Her karyotype was performed during infancy because of malformations and showed deletion of the long arm of chromosome 18. The patient had been treated with levothyroxine (Elthyrone) since age 13 when primary hypothyroidism was documented. A close hematological follow-up was then undertaken due to the presence of anti-parietal cell antibodies. A megaloblastic anemia of sudden offset led to the diagnosis of pernicious anemia by age 16, which was confirmed by a positive Shilling's test. Recently, the patient was found to have antimicrosome antibodies and moderate IgM hypogammaglobulinemia.
authors.affiliation: Département de Pédiatrie, Cliniques Universitaires Saint-Luc, Bruxelles, Belgique.
authors.forename: B
authors.initials: B
authors.lastname: Henrot
authors.forename: J
authors.initials: J
authors.lastname: Ninane
authors.forename: C
authors.initials: C
authors.lastname: Mercenier
authors.forename: C
authors.initials: C
authors.lastname: Vermylen
authors.forename: C
authors.initials: C
authors.lastname: Verellen
authors.forename: G
authors.initials: G
authors.lastname: Cornu
authors.forename: P
authors.initials: P
authors.lastname: Malvaux
mesh_terms: D000293:Adolescent; D000361:Agammaglobulinemia / Q000235:genetics*; D000752:Anemia, Pernicious / Q000235:genetics*; D002869:Chromosome Aberrations / Q000235:genetics; D002872:Chromosome Deletion; D025063:Chromosome Disorders; D002887:Chromosomes, Human, Pair 18; D005260:Female; D006801:Humans; D007037:Hypothyroidism / Q000235:genetics*; D007075:Immunoglobulin M / Q000172:deficiency
chemical_list: D007075:Immunoglobulin M
vernacular_title: Délétion du bras long du chromosome 18, hypothyroïdie primaire, anémie de Biermer et hypogammaglobulinémie de type IgM.